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Sub task 7.10
Phase 1 Final Draft Report
Juvenile AnadromoDs Fisb Study
on the Lower Su~ilna River
ADF&G I Su Hydro 1981
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ALASKA POWER AUTHORITY
SUSITNA HYDROELECTRIC PROJECT
RECEIVED
FEB?21988
library
Branch of Alaskan GeOlogy
\nchorage.Afask;"
Subtask 7.10
Pbase 1 Final Draft Report
Juvenile AnadromoDs Fish Sludy
on tbe Lower SU5i1na River
ADF&G I Su Hydro 1981
by
Alaska Department of Fish and Game
Susitna Hydro Aquatic Studies
2207 Spenard Road
Anchorage,Alaska 99503
for
Acres American Incorporated
Liberty Bank Building,Main at Court
Buffalo,New York 14202
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TABLE OF CONTENTS
Title
SUMMARY •••••••••••••••'•••••••••••••'•••••e .•••••••••••••'••••••
INTRODUCTION ....•.•..•.••••.•,e ••••••••••••••••••••••••••••••
SPECIES REPORTS -JUVENILE ANADROMOUS FISH ..•......•••.••...
3.1 CHINOOK SALMON JUVENILES ..........•..•••••........••.•.
3.1.1 Abstract '.
3.1.2 Introduction .
3.1.3 Methods ''.'.....•...................
3.1.4 Results and Discussion -Winter ••..••.........•.
3.1.4.1 Distribution and
Relative Abundance .••.••......•..•..•...
3.1.4.2 Age and Length Composition •••...•......••
3.1.5 Results and Discussion -Summer ...•••....•.....'.
3.1.5.1 Distribution and
Relative Abundance ..•..••••.....•..•••••
3.1.5.2 Age and Length Composition .•.....•.......
3.2 COHO SALMON JUVENILES •......••...•.....••••.••..•......
3.2.1 Abstract .............•.......................-.
3.2.2 Introduction .
3.2.3 Methods ..................................•......
3.2.4 Results and Discussion -Winter ...•••...........
3.2.3.1 Distribution and
Relative Abundance .•••.....•••.••.•••...
3.2.3.2 Age and Length Composition •.........•...•
3.2.5 Results and Discussion -Summer •...•....•.....••
3.2.5.1 Distribution and
Relative Abundance .....••••••......•....
3.2.5.2 Age and Length Composition ...•.•.•..•....
3.3 OTHER JUVENILE SALMON •..........••.•....•;.••.......•..
3.3.1 Abstract '.
3.3.2 Introduction .
3.3.3 Methods .....................................•...
3.3.4 Results and Discussion ........••.•...•...•....••
Page
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E-2-1
E-3-1
E-3-1
E-3-1
E-3-3
E-3-5
E-3-6
E-3-6
E-3-12
E-3-15
E-3-15
E-3-35
E-3-50
E-3-50
E-3-51
E-3-53
E-3-54
E-3-54
E-3-64
E-3-68
E-3-68
E-3-82
E-3-96
E-3-96
E-3-96
E-3-97
E-3-97
Title Page
3.3.4.1 Distribution and
Relative Abundance......................E-3-97
3.3.4.2 Age and Length Composition...............E-3-100
4.LITERATURE ·CITED.............................E-4-1
5.ACKNOWLEDGEMENTS.......................•.....................E-5-1
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•
Table E.2.1
Table E.2.2
Table E.2.3
Table E.2.4
Table E.3.1.1
Table E.3.1.2
Table E.3.1.3
Table E.3.1.4
Table E.3.1.5
Table E.3.1.6
Table E.3.1.7
LIST OF TABLES
Estuary to Little Willow Creek
Rustic Wilderness to Montana Creek
Mainstem near Parks Highway bridge to
Mainstem below Curry
Mainstem Susitna (opposite Curry)to
Portage Creek
Chinook salmon juveniles,catch per
unit effort at selected fish habitat
sites on Indian River and Portage Creek,
January through April,1981.
Chinook salmon juveniles,catch per
unit effort at habitat location sites
on the Susitna River between Talkeetna
and Devil Canyon,January through April,
1981.
Chinook salmon juveniles,catch per unit
effort at selected fish habitat sites
on the Susitna River between Talkeetna
and Devil Canyon January through April,
1981.
Chinook salmon juveniles,catch per unit
effort at habitat location sites on the
Susitna River between Cook Inlet and
Talkeetna,November,1980 to May,1981.
Chinook salmon juveniles,catch per unit
effort at selected fish habitat sites on
the Susitna River between Cook Inlet and
Talkeetna,November,1980 to May,1981.
Chinook Salmon (age 0+),catch per unit
effort at habitat location sites on the
Susitna River between Talkeetna and Devil
Canyon,June to September,1981.
Chinook salmon (age 1+),catch per unit
effort at habitat location sites on the
Susitna River between Talkeetna and Devil
Canyon,June to September,1981.
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Page
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E-2-6
E-2-7
E-2-8
E-3-8
E-3-9
E-3-1O
E~3-13
E-3-14
E-3-20
E-3-24
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Table E.3.1.8 Chinook salmon (age 0+),catch per unit E-3-28 I
effort at selected fish habitat sites on
Indian River and Portage Creek,June,IAugust,and October,1981.
Table E.3.1.9 Chinook salmqn juveniles,catch per unit E-3-32 Ieffortathabitatlocationsitesonthe
Susitna River between Cook Inlet and
Talkeetna,June to September,1981.ITableE.3.1.10 Chinook salmon juveniles,catch per unit E-3-34
effort at selected fish habitat sites on
the Susitna River between Cook Inlet and IDevilCanyon,June through September,
1981.
Table E.3.1.11 Chinook salmon juveniles,age-length E-3-38 Ifrequencyathabitat.location sites on
the Susitna River between Talkeetna and IDevilCanyon,June to September,1981.
Table E.3.2.1 Coho salmon juveniles,percent incidence E-3-56
at habitat location sites on the mainstem ISusitnaRiveranditstributarymouths
between Cook Inlet and Devil Canyon,
November,1980 to May,1981.ITableE.3.2.2 Coho salmon juveniles,catch per unit E-3-57
effort at habitat location sites on the ISusitnaRiverbetweenCookInletand
Talkeetna,November,1980 to May,19S1.
Table E.3.2.3 Coho salmon juveniles,catch per unit E-3-59 Ieffortatselectedfishhabitatsites
on the Susitna River between Cook Inlet
and Talkeetna,November,1980 to May,I1981.
Table E.3.2.4 Coho salmon juveniles,catch per unit E-3-61 Ieffortathabitatlocationsitesonthe
Susitna River between Talkeetna and
Devil Canyon,November,1980 to May,1981.
ITableE.3.2.5 Coho salmon juveniles,catch per unit E-3-62
effort at selected fish habitat sites
on the Susitna River between Talkeetna IandDevilCanyon,November,1980 to
May,1981.
Table E.3.2.6 Coho salmon juveniles,age-length E-3-67 'Ianalysisathabitatlocationsiteson
the Susitna River between Cook Inlet and
Devil Canyon,November,1980 to May,1981.I
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Table E.3.2.7
Table E.3.2.8
Table E.3.2.9
Table E.3.2.10
Table E.3.2.11
Table E.3.2.12
Table E.3.2.13
Table E.3.2.14
Table E.3.2.15
Coho salmon juveniles,percent incidence E-3-70
at habitat location sites on the mainstem
Susitna River and its tributary mouths
between Cook Inlet and Talkeetna,June to
September,1981.
Coho salmon juveniles,catch per unit E-3-72
effort at selected fish habitat sites
on the Susitna River between Cook Inlet
and Devil Canyon,June to September,1981.
Coho salmon juveniles,catch per unit E-3-73
effort at habitat locations on the
Susitna River between Cook Inlet and
Talkeetna,June to September,1981.
Coho salmon juveniles,percent incidence E-3-78
at habitat location sites on the mainstem
Susitna River and its tributary mouths
between Talkeetna and Devil Canyon,June
to September,1981.
Coho salmon (age 0+),catch per trap day E-3-79
at selected fish habitat location sites
on Indian River and Portage Creek,June,
August,and October,1981.
Coho salmon (age 0+),catch per unit E-3-80
effort at habitat location sites on the
Susitna River between Talkeetna and Devil
Canyon,June to September,1981.
Coho salmon (age I+),catch per unit E-3-81
effort at habitat location sites on
the Susitna River between Talkeetna and
Devil Canyon,June to September,1981.
Coho salmon (age 0+and I+),length E-3-90
analysis at habitat location sites
between Talkeetna and Devil Canyon,
June to September,1981.
Coho salmon juvenile,length analysis E-3-91
at habitat location sites on the Susitna
River between Cook Inlet and Talkeetna,
Talkeetna and Devil Canyon,and also
at selected fish habitat sites on
Indian River and Portage Creek,June to
October,1981.
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Table E.3.3.1
Table E.3.3.2
Pink,chum and sockeye juvenile catches
in the Susitna River between Cook Inlet
and Devil Canyon,November,1980 to
October,1981.
Pink,chum and sockeye juvenile length
composition in the Susitna River between
Cook Inlet and Devil Canyon,November,
1980 to September,1981.
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E-3-98
E-3-101
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LIST OF FIGURES
Resident and juvenile anadromous study,E-2-12
biological data form,1980-81.
Resident and juvenile anadromous study,tag E-2-13
and recapture form,1980-81.
Resident and juvenile anadromous study,E-2-10
catch and effort form,fixed gear,1980-
81.
E-3-22
E-3-17
E-3-21
E-3-16
E-3-25
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Length frequency composition of juvenile
chinook salmon captured at habitat
location and selected fish habitat
sites on the Susitna River between Cook
Inlet and Talkeetna r November,1980 to
May,1981.
Length frequency compos iti on of juvenil e
chinook salmon captured at habitat
location and selected fish habitat sites
on the Susitna River between Talkeetna
and Devil Canyon,November,1980 to
May,1981.
Numbers of juvenile chinook salmon cap-
tured per trap day at Whiskers Creek
Slough,Slough 6A,Slough 10,and Slough
20 on the Susitna River,June to Septem-
ber,1981.
Page
Map of the lower Susitna River study area E-2-2
from Cook Inlet to the proposed Devil Canyon
dam site.
Resident"and juvenile anadromous study,E-2-11
catch and effort form,movile gear,1980-
81.
Percent incidence of chinook salmon
(age 0+)at habitat location sites
on the mainstem Susitna River and
its tributary mouths between Talkeetna
and Devil Canyon,June to September,
1981.
Percent incidence of chinook salmon
(age 0+)captured at habitat location
sites on the Susitna River between
Talkeetna and Devil Canyon,June to
September,1981.
Figure E.3.1.2
Figure E.3.1.3
Figure E.3.1.4
Figure E.3.1.5
Figure E.2.1
Fi gure E.2.4
Fi gu re E.3 .1.1
Figure E.2.3
Figure E.2.5
Figure E.2.2
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Figure E.3.2.2
Figure E.3.2.3
Figure E.3.2.4
Figure E.3.2.5
Figure E.3.2.6
Figure E.3.2.7
Figure E.3.2.8
Figure E.3.2.9
Age-length frequency composition of E-3-66
juvenile coho salmon in the Susitna
River between Cook Inlet and Devil
Canyon,December,1980 to March,1981.
Age determined by scale analysis.Lengths
are total.
Percent incidence of coho salmon E-3-69
juveniles captured at habitat location
sites on the Susitna River between Cook
Inlet and Talkeetna,June to September,
1981.
Percent incidence of coho salmon (age 0+)E-3-76
captured at habitat location sites on the
Susitna River between Talkeetna and Devil
Canyon,June to September,1981.
Percent incidence of coho salmon (age I+)£-3-77
captured at habitat location sites on the
Susitna River between Talkeetna and Devil
Canyon,June to September,1981.
Age-length frequency composition of E-3-83
juvenile coho salmon in the Susitna
River between Cook Inlet and Devil
Canyon during August and early Septem-
ber,1981 determined by scale analysis.
Lengths are total.
Length frequency composition of E-3-86
juvenile coho salmon at habitat location
sites on the Susitna River between Cook
Inlet and Talkeetna,June to September,
1981.Lengths are total.
Length frequency composition of juvenile E-3-88
coho salmon at habitat location sites on
the Susitna River between Talkeetna and
Devil Canyon,June to September,1981.
Lengths are total.
Length frequency composition of juvenile E-3-93
coho salmon at habitat location sites and
selected fish habitat sites on Indian
River and Portage Creek,June to early
October,1981.Lengths are total.
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EB-1.1
EB-1.2
EB-1.3
EB-2.1
EB-2.2
EB-2.3
LIST OF APPENDIX TABLES EB
Chinook salmon juveniles,catch per unit effort at habitat
locations on the lower Susitna River between Cook Inlet and Devil
Canyon,November,1981 to October,1981.
Chinook salmon (age 0+),catch per unit effort at habitat
locations on the lower Susitna River between Cook Inlet and Devil
Canyon,November,1981 to October,1981.
Chinook salmon (age 1+),catch per unit effort at habitat
locations on the lower Susitna River between Cook Inlet and Devil
Canyon,November,1981 to October,1981.
Coho salmon juveniles,catch per unit effort at habitat locations
on the lower Susitna River between Cook Inlet and Devil Canyon,
November,1981 to October,1981.
Coho salmon (age 0+),catch per unit effort at habitat locations
on the lower Susitna River between Cook Inlet and Devil Canyon,
-Nqvember,1981 to October,1981.
Coho salmon (age 1+),catch per unit effort at habitat locations
on the lower Susitna River between Cook Inlet and Devil Canyon,
November,1981 to October,1981.
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1.SUMMARY
(l)This study was designed to gather information describing the presence,
abundance,geographical and seasonal distribution,age class composition,
length distribution,and smolt migration timing of juvenile salmon in the
Susitna River between Cook Inlet and Devil Canyon as part of a feasi-
bility study regarding the proposed Susitna Hydroelectric project.
(2)Field collection of data on juvenile salmon fish species took place from
November,1980 to October,1981.Sampling gear used included variable
mesh gillnets,minnow traps,beach seines,electrofishing units,and dip
nets.
(3)Five juvenile salmon species were captured during the course of this
study.
(4)Juveni 1e chinook salmon were captured throughout the study area.The
majority of juvenile chinook salmon captured during winter between Cook
Inlet and Devil Canyon occurred at slough and mainstem Susitna River
sites and in summer at tributary mouth sites.Two age classes (0+and
I+)were captured.Age I+were not captured after July between Talkeetna
and Devil Canyon and were not captured after August in the Cook Inlet to
Talkeetna reach.
(5)Juvenile coho salmon occurred throughout the study area.The majority of
juvenile coho salmon captured between Cook Inlet and Talkeetna during
winter and summer occurred at tributary mouth sites.Between Talkeetna
E-1-1
and Devil Canyon occurrence was greater at slough sites in winter and at
slough and tributary mouth sites in summer.Three age classes (0+,I+
and II+)were captured.Age II+were not captured after May in the
Talkeetna to Devil Canyon reach-and were not captured after mid June in
the Cook Inlet to Talkeetna reach.
(6)Relatively small numbers of juvenile pink,chum and sockeye salmon were
collected in 1980-1981.Sampling scheme bias imposed by gear types and
by location of effort can account for the 1imited numbers of these
juvenile salmon species encountered.Further seasonal distribution,
relative abundance,and biological information on these three juvenile
salmon species is needed to evaluate their life histories.
(7)Further information is needed on the winter distribution and habits of
all five species of juvenile salmon.
(8)Further information is needed on the timing of the smolt outmigration and
also on the incubation of embryos of all five juvenile salmon species.
E-1-2
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2.INTRODUCTION
The lower Susitna River extends 152 River Miles (RM)from Cook Inlet upstream
to the proposed Devil Canyon dam sfte (Figure E.2.1).The study area for the
1980-81 field work was limited to the mainstem Susitna River,its sloughs and
side channels,and those reaches of tributary streams directly influenced by
Susitna River stage fluctuations.Over its course from Devil Canyon to Cook
Inlet,the Susitna River loses nearly 950 feet of vertical elevation and
undergoes numerous morphological changes.
From Cook Inlet to Talkeetna,the first 98 river miles,the Susitna rises 350
feet in elevation and combines with three major tributaries;the Yentna (RM
30),Talkeetna (RM 98)and Chulitna (RM 98.5),all glacial rivers.The Cook
Inlet to Talkeetna reach includes the Susitna River Delta,the relatively
stable Susitna Station (RM 29)area,the Delta Islands (RM 40-61),and an
extensively braided area from the Kashwitna River (RM 61)upstream to Tal-
keetna (RM 97).
Major salmon and resident fish producing tributary streams such as Alexander
Creek,Willow Creek,Deshka River and Montana Creek flow into the Susitna
River in the Cook Inlet to Talkeetna reach.These streams provide a sub-
stantial contribution to Susitna River fish production and account for over
one hundred thousand man days of sport fishing effort annually in their multi-
species fisheries (Mills,1980).
E-2-1
17
-..-
I I _~L ====t.
SCALE
17 miles 0
J':lP(F,
$.1lI~
Cj)
~.~...
STATION
•SUNSHINE ST ATION
~
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VENTNA
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Figure E.2.1.Map of the lower Susitna River study area from Cook Inlet to the proposed Devil
Cqnyon dam site.
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Above Talkeetna,the Susitna river begins to gain elevation more rapidly as it
enters the foothills of the Talkeetna mountains.The river channel is rela-
tively stable restricted by the surrounding hills.However,numerous islands,
sloughs and braided areas still exist.
Streams tributary to the Susitna River in the Talkeetna to Devil Canyon reach
include Whiskers Creek,Lane Creek,Fourth of July Creek,Gold Creek,Indian
River and Portage Creek in addition to numerous smaller streams draining the
surrounding hillsides.These streams together with the mainstem Susitna
River,its side channels and sloughs combine to sustain substantial resident
and anadromous fish populations.
Access to the fisheries resources of the lower Susitna River may be gained by
various means 'including road,railroad,riverboat,and aircraft.
Prior to the initiation of 1980-81 Susitna Hydroelectric Aquatic Studies
juvenile anadromous fisheries data describing species composition,seasonal
distribution,relative abundance,migrational movement patterns and aspects of
species life history within the lower Susitna River study area,consisted of
various studies conducted within individual tributary streams and preliminary
Susitna Hydro environmental assessments.Engel and Watsjold (1978)an~
Delaney,Hepler and Roth (l981)researched juvenile salmon populations in
Willow Creek and the Deshka River.Barrett (l975a,b,c)and Riis and Friese
(1978),in documents prepared for the United States Fish and Wildlife Service,
reported preliminary environmental assessments of hydroelectric development on
the Susitna River.
E-2-3
For the purposes of this study,the lower Susitna River was divided into two
reporting reaches:Cook Inlet (RM 0)to Talkeetna (RM 98)and Talkeetna to
Devil Canyon (RM 152.0).Studies were conducted from November,1980 to
October,1981.The data collected beginning November,1980 and extending
through May,1981 will be reported as winter studies.This time period
included exploratory sampling as well as project development.In June,1981,
39 specific areas hereafter referred to as habitat locations were selected for
study along the Susitna River from Cook Inlet to Devil Canyon to represent the
available aquatic habitat.Habitat locations consisted of one to three
sampling sites and included many of the areas examined during the winter
studies.Additional areas identified in earlier studies and areas selected to
provide additional representation of unique aquatic habitats were also
included.These areas are referred to as selected fish habitat sites.Tables
E.2.1 to E.2.4 list the 39 habitat locations,44 sampling sites included
within these,and the corresponding river miles and geographic codes for each.
A sampling scheme was devised whereby each habitat location site would be
examined twice each month using standard fisheries sampling gear such as wire
mesh minnow traps,variable mesh gi11nets,beach seine,e1ectrofishing units,
dip nets and fish traps.Appendix Table EA presents a summary of sampling
effort by habitat location,sampling period,and gear type on the lower
Susitna River for the 1980-1981 season.
Minnow traps and set variable mesh gill nets were considered "fixed gear"and
fished for two consecutive 18 to 24 hour periods.The remaining gear types
including e1ectrofishing and beach seine,were considered mobile gear and were
utilized as river condition or gear availability permitted.Fish traps
E-2-4
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Table E.2.1.Estuary to Little Willow Creek
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Habitat Location.
Alexander Creek
Alexander Creek
Alexander Creek
Anderson Creek
Kroto Slough Mouth
Mainstem Susitna Slough
Mid Kroto Slough
Deshka River
Deshka River
Deshka River
Delta Islands
Little Willow Creek
Site
A
B
C
E-2-5
R.M.Geographic Location
10.1 15N 07W 06 OCA
10.1+2.0 16N 07W 32 CCB
10.1+4.0 16N 07W 30 ACO
23.8 17N 07W 29 DOD
30.1 17N 07W 01 DBC
31.0+2.5 17N 06W 05 CAB
36.3 18N 06W 16 BBC
40.6 19N 06W 35 BOA
40.6+1.0 19N 06W 26 BCB
40.6+3.5 19N 06W 14 BCA
44.0 19N 05W 19 ACB
50.5 20N 05W 27 MO
Total -12
Table E.2.2.Rustic Wilderness to Montana Creek
Habitat Location Site R.M.Geographic Location-
Rustic Wilderness 58.1 21N 05W 25 CBo
Kashwitna River 61.0 21N 05W 13 AAA
Caswell Creek 63.0 21N 04W 06 BOD
Slough West Bank 65.6 22N 05W 27 AoC
Sheep Creek Slough 66.1 22N 04W 30 BAB
Goose Creek .1 72.'0 23N 04W 31 BBC
Goose Creek 2 73.1 23N 04W 30 BBB
Mainstem Susitna West Bank 74.4 23N 05W 13 CCO
Montana Creek 77.0 23N 04W 07 ABA
Total - 9
E-2-6
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Table E.2.3.Mainstem near Parks Highway bridge to mainstem below Curry
Habitat Lo£ation Site R.M.Geographic Location--
Mainstem 1 84.0 24N 05W 10 DCC
Sunshine Creek 85.7 24N 05W 14 AAB
Birch Creek Slough 88.4 25N 05W 25 DCC
Birch Creek 89.2 25N 05W 25 ABO
Cache Creek Slough 95.5 26N OSW 35 ADC
Cache Creek 96.0 26N OSW 26 DCB
Whiskers Creek Slough 101.2 26N OSW 03 ADB
Whiskers Creek 101.4 26N 05W 03 AAC
Slough 6A 112.3 28N OSW 13 CAC
Lane Creek 113.6 28N OSW 12 ADD
Mainstem 2 114.4 28N 04W 06 CAB
Total -11_
E-2-7
Table E.2.4.Mainstem Susitna (opposite Curry)to Portage.Creek
Habitat Location
Mainstem Susitna -Curry
Susitna Side Channel
Mainstem Susitna -Gravel Bar
Slough 8A
Fourth of July Creek
Slough 10
Slough 11
Mainstem Susitna Gold Creek
Indian River
Slough 20
Mainstem Susitna -Island
Portage Creek
•
Site-
E-2-8
R.M.Geographic Location
120.7 29N 04W 10 BCD
121.6 29N 04W 11 BBB
123.8 30N 04W 26 000
125.3 30N 03W 30 BCD
131.1 30N 03W 03 OAC
133.8 31N 03W 36 AAC
135.3 31N 02W 19 000
136.9 31N 02W 17 COA
138.6 31N 02W 09 COA
140.1 31N 02W 11 BBC
146.9 32N 01W 27 OBC
148.8 32N 01W 25 COB
Total -12
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were experimental in nature and were only fished occasionally.Catch by
species and effort by gear type was recorded on field catch data collection
forms illustrated in Figures E.2.2 and E.2.3.
Biological data for juvenile salmon including date and location of catch,fork
length,sex,and a scale or otolith sample for age analysis were collected
from a subsample of all fish captured ..The biological data collection form is
illustrated in Figure E.2.4.
Winter field studies were carried out by three crews of three biologists each
operating from lodging facilities at Alexander Creek,Deshka River,Montana
Creek,Talkeetna and Gold Creek.Transportation was provided by pickup truck,
snow machine,helicopter,and fixed-wing ski plane.
The winter studies were considered to be an exploratory phase of the Resident
and Juvenile Anadromous project.A large number of sites were visited in an
attempt to achieve wide coverage and identify representative aquatic habitat.
This period from November,1980 to May,1981 was also used to obtain project
equipment and hire and train project personnel.
A total of eleven biologists,seven from the Resident and Juvenile Anadromous
project and four from the Aquati c Habitat project operated as four di stinct
crews to accompli sh the obj ect i ves of the summer (June -September)fi e 1d
program.The crews were based in semi -permanent tent camps located at the
Yentna,Sunshine and Talkeetna fishwheel stations and at Gold Creek.Each
crew util i zed a pi ckup truck,outboard jet powered riverboat and he 1 i copter
E-2-9
FII.No.03-81-7.10-2.71 Page 1 0'__
SUSITNA HYDRO RESIDENT &JUVENILE ANADROMOUS STUDY
FIXED GEAR CATCH DATA RJ 81-01
DATE:a ••,Sal _
Habllat Sampling River J I J ILocationSlIeMile__---'__.--'._--'__'--'._
ae.r PUlled ColleolorCd _
.!AIT CODE
.,Utlolal 1.II."•••••a
'Ih.r ..(.,.olly In 1111I.,1101
.PECIE.CODE
lIulllol .110
GlllnQolI Ot 410
cllinooll 1+4 11
cllu..IIlmon 4.0
Gollo Ot 430
00110 It 43'
00110 It 431
oollld 110
doUy warden .30
Ir.wUng lID
lIum,b.~1I
wlllletl.h .11
1.II.,rou'110
lon"noll .uollar 120
plnll ulmon 440
IIlnllow Iroul ....
round wllll.tI."••1
•••IIIoul.choll •I 1
.ocllowe O.420
.ocllow'..421
.IIolllob.oll 110
OEAR TYPE CODE
glll"ol 1
minnow 'rap •
Irol line 10
lIurlloi e.t lOa
TIM E CATCH -IPBCIEI COOl HO.REMARK8..t pllllad tot.'
---
•
-
--------I-----I-
1-------------
~\.
O~os
~~qO.,f~......."'i
tt .;-_:1 Jt1t;
qO
..0\
~bOo.Q
.-.
I 10
I--I-
II ..----,
-
-,
I ~I
...-
L 5 I
-
~--
",
I
N
I....o
Figure E.2.2.Resident and juvenile anadromous study.catch
and effort form.fixed ~earl 1980-1981.
-------- - -
- ------ --
---- -------------- -
Flte No.03-81-7.10-2.74 Paoe 1 01_
SUSITNA HYDRO RESIDENT &JUVENILE ANADROMOUS STUDY
MOBILE GEAR CATCH DATA RJ 81-04
__--1__--1_--1__--1_RiverMile _
ColleclorC.)--------------------
Samplingsu.
a ••r Pulled _
HabltalLocation _
DATE:aear Sal _
.REMARKS
"~,§/~'i'--;'ro+~/l'.+...it~'r---;:~.....-=---.,..----:C:=-A~T=.'=O':":li~--..-::8:-::P::-:E:-:O:-:I:-::E~8~O-=O~D:-::E="'":"N:-::O~.----n-----------.
Ii r1 q \"~'0..JT
.,1 1-1-1-1----1 1-11-1-1-1-1-1-1-1-1-1-11 1
-1-1--1-1-1-1-1 1-11-1--1-1-1-1-1-1-1--1-11 1,
'~=I I I 1-t=1 t=~=1 I t=1=1-I-I-'I-~:f:~-1I I
1=t=t=t=t:t=I-t=t=I.t=t=t=t=I=I=t-I~I~1I I I,-._._-._1_-1--'-1 I-II-I--I--I-'--I~--I-,-1-1--11 I
m
I
N
I........
1--1-1-1--1-1-1 I 11-1--1-1-1--1-1--1-1--1--11 1
t=1'I t=t=I=I=t=I-II-l I I I-I 1=1=1=t=II·I
1-1=~t=t=t=t=t=l=JI=J-I-I=I-I=t=t=t I tI I
0D2
1100
820
440
041
OU
011
420
421
••0
humpbec".,hlt.lI.h
I....lrou'
Ionono..IUOke'
pin"..Imon
,.,Inbow Irou'
round ..,htl.lIlh
Im.Il/.ul.chon
10C"'VI Ot
10C"'VI H-
IlIo..,.bac"
.PECIE.OODE
0110
410
41t
400
430
431
432
1110
030
110
•'alai IIml '0'Illioh IIlnl IIIUI.lllOlIolhoola and II ...11i &IInl",BAIT TYPI 0001
ar'lIIol.1 ,
lI.h I
'00'•
o'h"4
burbo'
ohlnoo"Ot
chInook,•
ohum ..Imon
ooho 0 t
ooho 1.
ooho 't
ooUld
doll""erdan
01l_Hn8
GEAn TYPE OODE
dllli lIlIIna',.
e'eollolhoo"a
b.lch ..lnl 3
hook &lin.II
olher Cap.clIr)0
Fi9ure E.2.3 Resident and juvenile anadromous study,catch and effort form,mobile gear,1980-1981.
SUSITNA HYDRO RESIDENT &JUVENILE ANADROMOUS STUDY
BIOLOGICAL DATA RJ 81-02
Figure E.2.4.Resident and juvenile anadromous study,biological
data fonn,l 980-1981.
E-2-12
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PaQe':""-of _
SPECIES CODE
580 ho.-....pb.c:t ",hit.raah sa
.410 tak.trOll!_550
.411 10....."0•••uck..;20
.&50 pn..••""011 ~
430 ,enbow trout 54t
~1 ,ound ...hi1.ftd Sail
.&32 am.lV.ulac.'-·511
.,0 aoc:i<.y.0+420
530 aock.y.1 +.&21
.10 a tW:J<taback eao
burbGI
chin......0+
chinook ,.
c:huft ••n-
coho 0+
coho 1.
coho 2+
cotlilldo'"...,d_
DraYlinO
Sampling RiverSit.Mile J"':_J_-I__.-I-
CoOectol'(a)_
GEAR TYPE COOE
be.da .....S
burtlOl'"10a.
cIriII ~,.
.~clro.hock 2
II......1
hoolr.l....•
",innow trail AS
trol ine 10
Fil.No._...;;0;.;::3;....-.;:;.8.:..'-...:.7.:.:.1;.;::O;....-=Z.:.:.7.:.~_
HabitatLocauon _
Date(s)ColleC1e~_
11 I I I I ,,I I
!2E I I
2;I II'127 .,
3;I I '.'.'I 2S 4 •II
~l i I I ~~I I I
51 I I p~I ,I I I
6 I ,I I 3~I I I I
71 !I 321 I I I I
al I I I I ~I ,,I
91 !I I I I I ~:I I I I
10 I ,,I I ~~I I I
111 I I I 3~I I I
12 I I I I I 37 f , ,,I
131 t I I :31:I
,"/i I I ~g I
15 I I I I
~q ,I ,
~61 I I 14~I I ,
.~7j I I 4~
ital 4::,I
~UI I I ....,"
!:zc I I I ~51 ,I
~11 ,I ~E .I
~21 f'7 I
23/4lS I
24 I I I 4Si1 I t
2~I I I 5q I I I I I
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for transportation and provided their own logistical support (i.e.gas,food).
The number of habitat location sites assigned to each crew consisted of:
Yentna-12,Sunshine-9,Talkeetna-II,and Gold Creek-12.
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3.SPECIES REPORTS -JUVENILE ANADROMOUS FISH
3.1 CHINOOK SALMON JUVENILES
3.1.1 Abstract
Juvenil e chinook salmon Oncorhynchus tshawytscha Wal baum were observed from
Alexander Creek {R.M.10.1}upstream to Portage Creek {R.M.148.8}during
studies conducted on the Susitna River from November,1980 through October,
1981.'Minnow traps were the primary collection 'technique for juvenile chinook
salmon in this study.Eighty seven habitat location and selected fish habitat
sites were surveyed from November through May,53'between Talkeetna and Devi 1
Canyon and 34 between Cook Inlet and Talkeetna.Seventy seven percent of the
707 juvenile chinook salmon recorded during the winter surveys were captured
between Talkeetna and Devil Canyon.The highest winter catch rate of 20 fish
per trap occurred at Slough 6A {R.M.112.3}during March.
Juvenile chinook salmon were observed at 43 of 44 {98%}habitat location sites
surveyed from June through October.A total of 6,579 juvenile chinook salmon
were captured during the summer surveys with a slough {R.M.136.9}recording
the highest catch rate of 32.0 fish per trap.Juvenile chinook salmon were
captured at selected fish habitat sites on Indian Riv,er {R.M.138.6}and
Portage Creek {R.M.148.8}during both summer and winter surveys.
Juvenile chinook salmon from the 1979 brood year {age I+}were observed
throughout the wi nter surveys and had a mean total 1ength of 77 mm and a.
length range from 54 mm to 110 mm.The first capture of 1980 brood year fish
{age O+}occurred April 18 at Indian River.Two age classes were present
E-3-1
until late July when no further captures of age I+fish were recorded between
Ta 1keetna and Devi 1 Canyon.Ana lys is of scales and 1ength frequency data
showed the presence of age I+chinook salmon in the reach between Cook Inlet
and Talkeetna through the end of August.The length of age 0+fish averaged
70 mm throughout the river by late September and ranged from 54 mm to 108 mm.
Juvenile chinook salmon populations varied in abundance and distribution by
river habitat type and seasonal period.Mainstem river and slough sites were
the most important winter rearing habitat type observed between Talkeetna and
Devil Canyon.Juvenile chinook salmon were captured at 88 percent of these
sites surveyed during the winter.Percent incidence in habitat location site
catches increased during the summer from 20 percent in late June to 88 percent
in early September.All juvenile chinook salmon captured at sites between
Talkeetna and Devil Canyon are believed to have migrated from associated
streams as no adult chinook salmon spawning in the mainstem river or slough
sites has been recorded to date.
Slough and mainstem Susitna River sites were found to be the most important
winter rearing area for juvenile chinook salmon of habitat sites located
between Cook Inlet and Talkeetna.Small numbers of juveni 1es were also
observed in the tributary mouth habitat locations in this reach.Juvenile
chinook salmon were observed at 60 to 93 percent of the tributary mouth
habitat location sites during summer surveys conducted between Cook Inlet and
Talkeetna.Tributary sites accounted for 95 percent of all juvenile chinook
salmon captured in this reach between June and October.Percent occurrence at
mainstem river and slough sites in this reach ranged from 27 percent in early
August to 88 percent in late September.
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3.1.2 Introduction
Chinook or king salmon Onchorhynchus tshawytscha Walbaum,the largest of the
five species of Pacific salmon,is an important target species for Alaskan
commercial,sport,and subsistence fishermen.The Susitna River drainage is
the major producer of chinook salmon in Cook Inlet and numerous studies have
been conducted on the adult phase of this species in the Susitna River
(Barrett 1974;Friese 1975;Kubik and Wadman 1978;Watsjold 1977).
The native range of chinook salmon in North America is from southern Cali-
fornia north to Point Hope,Alaska and extends from Siberia to Japan (Aro and
Shepard 1967).Numerous introductions of chinook salmon outside their native
range have been attempted,but a self-sustaining population has been success-
fully established only in New Zealand (Davidson and Hutchinson 1938).
The chinook salmon is an anadromous fish having a juvenile freshwater phase
and a marine growing phase with the mature adults returning to their natal
streams to spawn.Susitna River chinook salmon return to the streams as age
III to VII adults from May to July.Ages IV and V predominate (Adult Anadro-
mous Investigations,Alaska Department of Fish and Game Su Hydro Studies
1981).Spawning occurs from July to September and takes place in deeper water
and over larger substrate than the other salmon species (Scott and Crossman,
1973).Each female deposits an average of 7,000 eggs which incubate in the
gravel through the winter and hatch the following spring as water temperatures
begin to rise.The alevins remain in the nest a period of two to three weeks,
E-3-3
until the yolk sac is absorbed and then emerge from the gravel and become free
swimmi ng,feedi ng fry.The fry school at fi rst but become territori a1 and
aggressive as they grow (Scott and Crossman 1973).Terrestrial insects,
chironomid larvae,caddis flies,and small crustaceans are the major food
sources for juvenile chinook salmon (Riis and Friese 1978).
Chinook "salmon remain in freshwater up to two years before migrating to the
ocean as smolts.Adult Anadromous Investigations,Alaska Department of Fish
and Game Su Hydro Studies (l981)concluded from analysis of adult chinook
salmon scales that most Susitna River chinook salmon remained in freshwater
for one year before smolting.
Juvenile chinook salmon are characterized by six to 12 parr marks which are
broader than the interspaces,black spots on both lobes nf the caudal fin,an
unspotted dorsal fin,black gums along the base of the lower teeth,and spots
on all but the anterior portion of the adipose fin (McConnell and Snyder
1972).The smolting process is characterized by a loss of parr marks and a
change to a silvery color as the fish seek deeper water and avoid light (Scott
and Crossman 1973).
Studies of the juvenile life history of chinook salmon in upper Cook Inlet
tributary streams have been conducted by Kubik and Wadman (1978),Delaney and
Wadman (l979),and Delaney,Hepler,and Roth (l981).Barrett (l974)and
Friese (1975)have previously identified 28 clearwater sloughs and nine tribu-
taries as observed or potential rearing sites between Talkeetna and Devil
Canyon.
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3.1.3 Methods
Juvenile chinook salmon were collected from November,1980 through September,
1981.During the winter sampling,November through May,eleven habitat
locations located between Cook Inlet and Devil Canyon were surveyed on three
or more occasions.A large percentage of the sampling effort during this
period was exploratory to determine suitable survey sites.Beginning June 1,
sampling was essentially limited to 44 habitat location sites in the lower
Susitna River and was conducted on a bimonthly schedule as set forth
previously in this report.
Indian River (RM 138.6)and Portage Creek (RM 148.8)were surveyed at their
mouth habitat locations and upstream selected fish habitat sites from January
through April.Three selected fish habitat sites,determined by the stream's
interceptions with geological section lines and ease of access,were sampled
in both Indian River and Portage Creek in June,August,and October.
Indian River selected fish habitat Site 3 was relocated in August from Indian
River Mile 13.5 to Site 3A (Indian River RM 12.0)to provide better accessi-
bility.Portage Creek selected fish habitat Site 3 (Portage Creek RM 15.6)
was relocated in August from the east fork to the north fork Site 3A,(Portage
Creek RM 15.5)due to a hydraulic barrier below the east fork site,and
because of the presence of adult salmon observed in the north fork.
The primary collection technique for chinook salmon juveniles utilized 1/4
inch (6.4 mm)wire mesh minnow traps baited with preserved salmon roe sus-
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pended in a perforated container.Incidental catches were made using 1/8 inch
(3.2 mm)mesh beach seines,1/8 inch (3.2 mm)mesh minnow traps,and backpack
electrofishing units.
A representative sample of all juvenile chinook salmon were measured for total
length ·in millimeters (mm)and released.Age determinations were made by
length frequency analysis of measured fish and scale analysis of preserved
specimens.
3.1.4 Results and Discussion -Winter
3.1.4.1 Distribution and Relative Abundance
Juvenile chinook salmon were captured beginning with the first winter sampling
conducted in November,1980.Surveys conti nued through May and noted the
presence of rearing chinook salmon from Alexander Creek (RM 10.1)upstream to
Portage Creek (RM 148.8).
Eighty-seven habitat locations and selected fish habitat sites were sampled
duri ng the wi nter surveys,53 between Talkeetna and Devi 1 Canyon and 34
between Cook Inlet and Talkeetna.A total of 707 juvenile chinook salmon were
captured at 59%of the sites surveyed.Whiskers Creek accounted for 27.0%of
all juvenile chinook salmon captured during the winter surveys while the
Talkeetna to Devil Canyon reach provided 77.4%of the total winter captures.
E-3-6
Sampling was conducted at selected fish habitat sites on Indian River (RM
138.6)and Portage Creek (RM 148.8)from February through April,1981.Indian
River was surveyed from its mouth upstream to Indian River Mile 8.0 and
Portage Creek was surveyed from its "mouth upstream to Portage Creek River Mile
11.8.
Small numbers of juvenile chinook salmon,all from the 1979 brood 'class,were
observed in Indian River during March while April surveys showed the presence
of both 1979 and 1980 brood classes.The highest catch rate of 0.3 fish per
trap was recorded during March at River Mile 2.7 (Table E.3.1.1).Juvenile
chinook salmon,all from the 1979 brood cl ass,were observed in March at
Portage Creek.The highest catch rate of 0.7 fish per trap was recorded at
River Mile 9.5.
Juvenile chinook salmon were captured at eight of the 12 (75%)habitat
locations sampl ed between Talkeetna and Devi 1 Canyon from January through
April,1981 (Table E.3.1.2).Juvenile chinook salmon were collected at seven
of eight (88%)mainstem and slough habitat locations and one of four (25%)
tributary mouth habitat locations in this reach.The presence of rearing
chinook salmon was consistently noted at Slough 8A (RM 125.3),Slough 10 (RM
133.8),and Slough 20 (RM 140.1).Juvenile chinook salmon were captured at 18
of 30 (60%)selected fish habitat sites surveyed in this reach (Table
E.3.1.3).High catch rates were observed at Oxbow II (R.M.119.2)and Susitna
Side Channel (R.M.136.1).
Eleven of 18 (61%)habitat location sites sampled in the Cook Inlet to Tal-
keetna reach from November through May demonstrated the presence of juvenile
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Table E.3.1.1.Chinook salmon juveniles,catch per unit effort at selected
fish habitat sites on Indian River and Portage Creek,
February through April,1981.
INDIAN RIVER PORTAGE CREEK
River Catch per trap day River Catch per trap day
Mile Feb Mar Apr Mile Feb Mar Apr
0.5-1.2 0.0 0.1 3.0 0.0
2.7 0.0 0.3 5.5 0.0
4.0-7.0 0.1 6.5 0.0
7.0 0.0 0.0 9.5 0.0 0.7
8.0 0.0 10.0 -0.0
11.8 0.0 0.3
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Table E.3.1.3.Chinook salmon juveniles,catch per unit effort at selected
fish habitat sites on the Susitna River between Talkeetna and
Devil Canyon,January to April,1981.
Selected Fish River Catch per trap day
Habitat Site Mile Jan Feb Mar Apr
Mainstem Susitna at
Chul itna River 98.8-101.6 0.1 0.0 0.1
Oxbow II 119.2 2.5
Mainstem Susitna 121.0 0.0
Susitna Side Channel 125.0 0.1 0.0
Slough 8A (upper reach)126.1 0.0
Mainstem Susitna below
Slough 9 127.8 0.0
Slough 9 (lower reach)128.5 0.5 0.0 0.0
0.0
Slough 9 (middle reach)128.9 0.3
Slough 9 (upper reach)129.2 0.2
Susitna Side Channel 130.2 0.4
Mainstem Susitna 131.0 0.0 0.1 0.1
Susitna Side Channel 131.1 0.1 0.0
Beaver Stream above
Fourth of July Creek 131.4 0.0 0.1
Slough 9A (lower reach)133.3 0.0 0.0 0.1 1.0
Mainstem Susitna 133.4 .0.2 0.1 0.3
Mainstem Susitna below
Slough 10 133.6 0.0
Mainstem Susitna below
Slough 11 134.3 0.4
E-3-10
Table E.3.1.3 (Continued)
Selected Fish River
Habitat Site Mile
Susitna Side Channel 135.3
Slough 11 (headwaters)135.8
Slough 14 136.0
Susitna Side Channel 136.1
Mainstem Susitna 136.7
Gold Creek Confluence 136.7
Mainstem Susitna 136.8
Slough 16 137.7
Mainstem Susitna 138.6
Slough 17 138.9
Mainstem Susitna 139.3
Susitna Side Channel 141.3
Slough 21 141.8
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chinook salmon (Table E.3.1.4).Juvenile chinook salmon were collected at
four of six (67%)mainstem and slough habitat locations and seven of 12 (58%)
tributary mouth habitat location sites in this reach.Consistent catches were
observed at Sunshine Creek (RM 85~7)and Rustic Wilderness (RM 58.1).The
highest catch rate for juvenile chinook salmon in this reach occurred during
March at Rustic Wilderness where 2.7 fish per trap were captured.Juvenile
chinook salmon were observed at nine of 16 (56%)selected fish habitat sites
surveyed in this reach (Table E.3.1.5).
Juvenile chinook salmon were captured at 79 percent of the mainstem and slough
habitat location sites sampled between Cook Inlet and Devil Canyon during the
winter surveys,while only 50 percent of the tributary mouth habitat location
sites produced fish.The highest individual catch of juvenile chinook salmon
during winter sampling was observed in March in an open lead at Slough 6A
(R.M.112.3).Twenty fish were captured in a single trap set at this
location.
3.1.4.2 Age and Length Composition
Six hundred sixty eight juvenile chinook salmon(l62 fish collected between
Cook Inlet and Talkeetna,506 fish collected between Talkeetna and Devil
Canyon)were measured in millimeters for total length during the winter
sampling of Susitna River habitat location and selected fish habitat sites.
Six hundred fifty six (98.2%)of the fish measured were from the 1979 brood
year and were experiencing their first winter in freshwater.Fish collected
at Indian River (Rm 138.8)and Portage Creek (RM 148.8)habitat location and
selected fish habitat sites are included in the calculations.
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Table E.3.1.4.Chinook salmon juveniles,catch per unit effort at habitat I
location sites on the Susitna River between
Cook Inlet and Talkeetna,INovember,1980 to May,1981.
I
River Catch per trap day
Habitat Location Mile Nov Dec Jan Feb Mar Apr May I
Alexander Creek A 10.1 0.1 0.0 IAlexanderCreekB10.1 0.0
Deshka River A 40.6 0.0 I
Deshka River B 40.6 0.0 0.0
Deshka River C 40.6 0.1 I
Little Willow Creek 50.5 0.0 IRusticWilderness58.1 0.0 2.0 2.7 0.1
Kashwitna River 61.0 0.2 0.0 I
Caswell Creek 63.0 0.6 0.1
Sheep Creek Slough 66.1 0.2 0.0 I
Mainstem West Bank 74.4 0.0 IMontanaCreek77.0 0.5 0.0 0.0 0.0
Mainstem 1 84.0 0.0 0.0 0.0 0.0 I
Sunshine Creek 85.7 0.4 0.0 0.6 0.0 0.1 0.0 0.0
Birch Creek Slough 88.4 0.5 I
Bi rch Creek 89.2 0.1 0.0 0.0 ICacheCreekSlough95.5 0.0 0.1 0.0 0.1
Cache Creek 96.0 0.0 I
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E-3-13 I
Table E.3.1.5.Chinook salmon juveniles,catch per unit effort at selected
fish habitat sites on the Susitna River between Cook Inlet and
Talkeetna,November,1980 to May,1981.
Catch per trap day
0.0
0.1
0.0 0.0
0.0 0.0
0.0
0.1
0.0
1.4
0.0
0.2
0.1
0.0
0.2
0.2
0.1
0.0
0.0
0.0
0.4
Nov
E-3-14
83.2
96.7
97.8
84.2
60.0
River
Mile
49.3
40.6
59.0-62.0
43.2-43.9
49.3
77.7-80.0
78.6-79.2
66.8-68.0
91.9-94.8
9.5-10.8
39.0
Mainstem Susitna
Braided Channel
Mainstem Susitna
East Channel
Rolly Creek Mouth
Mainstem Susitna
near Sheep Creek
Rabideux Creek
Mainstem Susitna
below Cache Creek
Mainstem Susitna
above Montana Creek
Mainstem Susitna
West Channel
Beaver Slough
West Bank
Willow Creek Mouth
Mainstem Susitna
East Channel
Mainstem Susitna
below Sunshine Creek
Bi 11 ion Slough
Deshka River
Beaver Pond
Willow Creek at
Parks Highway
Selected Fish
Habitat Site
Gray Creek at
Parks Highway
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Figure E.3.1.1 provides the percent length frequency distribution for juvenile
chinook salmon collected from Talkeetna to Devil Canyon.Mean length for 1979
brood class fish collected during November,1980 through May,1981 was calcu-
lated to be 79.6 mm total length with a range of 55 mm to 108 mm.
The percent length frequency distribution for juvenile chinook salmon from the
Cook Inlet to Talkeetna reach is presented in Figure E.3.1.2.Chinook salmon
from the 1979 brood class in this reach ranged from 54 mm to 110 mm total
length and had a mean length of 77.3 mm.
Scale analysis conducted during the winter sampling on 34 juvenile chinook
salmon with a length range of 69 mm to 110 mm showed all specimens to be from
the 1979 brood year.
Twelve juvenile chinook salmon from the 1980 brood class were measured during
April and May,1981.The first captures of this age class were made April 18
at Indian River.The calculated mean length for these fish was 33.9 mm with a
range from 31 mm to 41 mm.
3.1.5 Results and Discussion -Summer
3.1.5.1 Distribution and Relative Abundance
Juvenile chinook salmon were captured at habitat location sites from Alexander
Creek (RM 10.1)upstream to Portage Creek (RM 148.8)during sampling conducted
from June 1 to September 30,1981.Selected fish habitat sites located in
E-3-15
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-------------------
r
-----"-·'1
12010080
~-
1979 Brood Yea
r--
f---
I--
.--
--
._J-.~
J J
--.----.---.,...-.-------r--------.---_..-----"---...-'-..--_.._-~_.'"_._--------I 20
o-+----T-----r---rIi-J
l'0 20 LI0 60
LENGTH (MMJ .
_______."......-.._._,_...._~.__.~.,~._.,.;_·__..~•._..........,..·~..~~.~O"_...,_.._.~'_..,...·!....,,~'-'"...'..'.~.·_•••"~'.'...,'_•.~·~.~,,.,.~>'.~.·...·.w_•••_••_.,....._·_.__'.4~~·'•._·.,~,_,,_._,,,
1980 Brood Year
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%15
F
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E 10Q
fTl U
I Ew
I N.....
m
I'?5
Figure E.3.1. 1.Length frequency composition of juvenile chinook salmon captured at habitat location
i and selected fish habitat sites on the Susitna River between Talkeetna and Devil
Canyon,November,1980 to May,1981.
ood Year
~0--1
100 120
I -_.
I
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I
...--
-1979 Br-
-
-
r--
-
.....--.r----<
I
oo--i I---r-r-ep-60 80
20 1.10 LENGTH (MMl
i ...'--
20
%15
1980 Brood Year
F
R
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Q 10
IT!U
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Y 5
Figure E.3.1.2.Length frequency composition of juvenile chinook salmon captured at habitat location
and selected fish habitat sites on the Susitna River between Cook Inlet and Talkeetna
November,1980 to May,1981.
'~
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Indian River (RM 138.6)and Portage Creek produced catches of juvenile chinook
salmon when sampled in June,August,and October.Chinook salmon juveniles
were not observed above Susitna River Mile 148.8 during the 1981 studies.
A total of 6,579 juvenile chinook salmon were captured during the summer
surveys at habitat location and selected fish habitat sites between Cook Inlet
and Devil Canyon.The reach between Talkeetna and Devil Canyon accounted for
34.2%of the total captures.Total numbers of juvenile chinook salmon cap-
tured by reach of river are:Cook Inlet to Willow Creek,1005 fish;Willow
Creek to Talkeetna,3,325 fi sh;Tal keetna to Devi 1 Canyon,1,893 fi sh;and
Indian River and Portage Creek,356 fish.
Juvenile chinook salmon were captured at 43 of 44 (97.8%)of the habitat
location sites surveyed between Cook Inlet and Devil Canyon during the summer
months.Kroto Slough mouth (RM 30.1)was the only habitat location site where
juveniles were not observed.
Beginning in April with the first captures of juvenile chinook salmon from the
1980.brood year,two age classes,age 0+and age I+,were present.Size
frequency distribution and scale analysis were utilized to determine the age
of the fish captured.It was possible to distinguish between age 0+and I+
chinook salmon in the Talkeetna to Devil Canyon reach and Indian River and
.Portage Creek,however separation of the two ages in the Cook Inlet to Tal-
keetna reach was not possible due to the extensive overlap in length ranges.
This situation will be detailed later in the discussion of length and age
composition.
E-3-18
The following discussion will differentiate age 0+and age I+chinook salmon
in the Talkeetna to Devil Canyon reach and Indian River and Portage Creek,
while both age classes will be combined for the discussion of the reach
between Cook Inlet and Talkeetna.
The catch per unit effort of chinook salmon age 0+at habitat location sites
in the Talkeetna to Devil Canyon reach ranged from a trace at Mainstem-Curry
(RM 120.7)throughout the season to a catch rate of 12.0 fi sh per trap
recorded at Fourth of July Creek (RM 131.1)in early August (Table E.3.1.6 and
Appendix Table EB-1.2).
An increase in catch per unit effort of age 0+fish was apparent as the season
progressed at most habitat location sites in this reach.This was most
obvious at Whiskers Creek Slough (RM 101.2),Slough 6A (RM 112.3),Slough 10
(RM 133.8),and Slough 20 (RM 140.1),where catches increased from 0.1 chinook
salmon age 0+per trap in the first two weeks of June to up to 11.7 fish per
trap at Slough 20 in the late September survey (Figure E.3.1.3).As none of
these sites are known spawning areas for chinook salmon,this seasonal change
indicates a redistribution of chinook salmon age 0+from areas of high post-
emergent density to more favorable conditions as size and season progressed.
This movement was also noted in the Deshka River (Delaney,Hepler,and Roth,
1981)the Little Susitna River (Delaney and Wadman,1979),and Montana Creek
(Riis and Friese,1978)and was observed as a predominantly downstream move-
ment.the percent incidence of age 0+chinook salmon in habitat location
catches in the Talkeetna to Devil Canyon reach increased from 15 percent of
the locations sampled in late June to 92 percent of the locations in early
September (Figure E.3.1.4).
E-3-19
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I Tab 1e E.3.1.6.Chinook salmon (age O+)~catch per unit effort at habitat location
sites on the Susitna River between Talkeetna and Devil Canyon,
I June to September,1981.
I Catch ~er trap day
River June June July Ju y Aug Aug Sept Sept
Habitat Location Mile 1-15 16-30 1-15 16-31 1-15 16-31 1-15 16-30
1-Whiskers Creek Slough 101.2 0.1 0.1 0.0 0.1 0.2 0.4 0.7 2.8
Whiskers Creek 101.4 0.0 0.0 0.2 0.7 0.8 0.0 0.3 2.0
I Slough 6A 112.3 0.0 0.0 0.0 0.2 0.0 0.1 3.1 2.4
I·Lane Creek 113.6 0.0 0.0 0.1 0.0 0.1 0.3 1.9 8.0
Mainstem 2 114.4 0.0 0.0 0.1 0.0 0.1 0.2 0.9 0.0
I Susitna Curry 120.7 0.0 0.0 0.0 0.0 0.0 0.0
Susitna Side Channel 121.6 0.0 0.0
0.0 0.0 0.1 0.1
I Susitna Gravel Bar 123.8 0.0 0.0 0.0 0.0 0.1 0.4
I Slough 8A 125.3 0.0 0.1 0.1 0.0 1.9 0.7
Fourth of July Creek 131.1 0.0 0.7 3.8 12.0 4.5 1.3 3.0
I Slough 10 133.8 0.0 0.0 0.5 1.5 1.8 0.7 5.5
Slough 11 135.3 0.1 0.0 0.0 0.0 2.3 0.1 1.9
I Susitna Gold Creek 136.9 0.0 0.0 0.0 0.0 0.8 0.1 0.2
I Indian River Mouth 138.6 0.1 0.1 0.5 1.6 0.2 8.0 6.5
Slough 20 140 0.0 0.0
0.1 0.1 1.2 4.1 11.7
I Susitna Island 146.9 0.1 0.1 0.0 0.0 0.0 0.0 0.0
Portage Creek Mouth 148.8 0.0 0.3 0.1 0.0 0.2 0.1 0.3
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15
F
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H
P 10
E ~----------..WHISI<ERS CREEK SLOlKiHA--------SLClJGH 6A
T l ----SLOUGH 10
SLaJGH 20R
'"I A 5.<f P
N......
I
0
A
Y I ,----
,/
0 I -~,/
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JUNE JULY AUGUST SEPTEMBER
I
Figure E.3.1.3.Numbers of juvenile chinook salmon captured per trap day at Whiskers Creek Slough,
Sloug~6A,Slough 10,and Slough 20 on }he Susitna River,June to September,1981.
-------------------
-------------------
----
~-----I I-.
-------.
-
I I I.I I I I I I
o
I 100~0+CHINOOK SALMON
p
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~75
E
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T
I 50
N
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Io
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N
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rr1
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Figure E.3.1.4.Percent incidence of chinook salmon (age 0+)captured at habitat location sites on the
Susitna River between Talkeetna and Devil Canyon,June to September,1981.
I
The chinook salmon age I+catch rates recorded during the summer in the
Talkeetna to Devil Canyon reach were low compared to those catch rates
observed in this reach during the winter surveys.Winter catch rates reached
a high of 20.0 fish per trap compared to a high of 0.4 fish per trap for
summer surveys.This reduction in catch rate indicates a majority of age I+
chinook salmon move out of the Talkeetna to Devil Canyon reach prior to the
initiation of sampling in early June (Table E.3.l.7 and Appendix Table
EB-1.3).A total of 44 chinook salmon age I+were captured in this reach
during the summer surveys.
Figure E.3.1.5 provides a comparison of the percent incidence of chinook
salmon age 0+in tributary mouth and mainstem slough habitat location sites
located between Talkeetna and Devil Canyon by two week period.Age 0+chinook
salmon catches were recorded at 80 to 100 percent of the tributary mouth
habitat locations surveyed from early July through late September.Mainstem
and slough habitat location catches indicated a net increase in percent
incidence as the season progressed from a low of 20.0 percent in late June to
a high of 87.5 percent in early September.Age 0+chinook salmon appear to
extend their distribution from tributary streams and stream mouth sites into
mainstem and slough sites as the summer progressed.Indian River mouth was
the only habitat location in this reach which produced chinook salmon age 0+
for 100 percent of the surveys.
Chinook salmon age I+were observed at 45 percent of the sites surveyed during
the first two weeks of June,decreasing through late July,and were completely
absent from the Talkeetna to Devil Canyon reach prior to the early August
E-3-23
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I Table E.3.1.7.Chinook salmon (age 1+),catch per unit effort
at habitat location sites on the Susitna River
I between Talkeetna and Devil Canyon,
June to September,1981.
I Catch per traR day
River June June July July ug Aug Sept Sept
Habitat Location Mile 1-15 16-30 1-15 16-31 1-15 16-31 1-15 16-30
I Whiskers Creek Slough 101.2 0.4 0.1 0.0 0.1 0.0 0.0 0.0 0.0
Whi skers Creek 101.4 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0
I Slough 6A 112.3 0.1 0.4 0.0 0.0 0.0 0.0 0.0 0.0
I Lane Creek 113.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Mainstem 2 114.4 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0
I Susitna Curry 120.7 0.1 0.0 0.0 0.0 0.0 0.0
Susitna Side Channel 121.6 0.0 0.0 0.0 0.0 0.0 0.0
I Susitna Gravel Bar 123.8 0.4 0.1 0.0 0.0 0.0 0.0
I Slough 8A 125.3 0.0 0.0 0.0 0.0 0.0 0.0
Fourth of July Creek 131.1 0.0 0.1 0.1 0.0 0.0 0.0 0.0
I Slough 10 133.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Slough 11 135.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0
I Susitna Gold Creek 136.9 0.1 0.0 0.0 0.0 0.0 0.0 0.0
I Indian River Mouth 138.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Slough 20 140.1 0.0 0.0 0.0 0.0 0.00.0 0.0
I Susitna Island 146.9 0.1 0.1 0.0 0.0 0.0 0.0 0.0
Portage Creek Mouth 148.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0
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MAINSTEM SITES
Z 100--
I -
N -
C-
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D -
E -
N -C -E 0-+--+--r-+--r--+-~~-+--~_-J---+----+--I~~E I I IJUL.I ~UGUst S~TEM~ERJ
TRIBOTARY SITES
X 100--
I -
N -
C -
I so-
D -
E -
N -
C -
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JUNE JULY AUGUST SEPTEMBER
Figure E.3.1.5.Percent incidence of chinook salmon (age 0+)at
habitat location sites'on the mainstem Susitna River
and its tributary mouths between Talkeetna and Devil
Canyon,June to September,1981.
E-3-25
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survey (Figure E.3.1.6).It is presumed these age I+chinook salmon were
smolts undertaking a seaward migration with the peak movement occurring prior
to the early June sampling.
Juvenile chinook salmon were captured during all three ice free sampling
periods conducted at Indian River selected fish habitat sites.All sites
sampled fn August and October recorded the presence of juvenile chinook
salmon,with the highest catches occurring at site 2 (Indian River RM 7.2)in
August where 7.0 fish per trap were observed.Indian River selected fish
habitat Site 3A (Indian River RM 12.0)produced the highest catch in October
of 2.9 fish per trap (Table E.3.1.8).
Juvenile chinook salmon were not captured in Portage Creek during the June
survey.The highest catch for Portage Creek was observed at site 1 (Portage
Creek RM 4.5)in August where 10.4 ch i nook sa 1mon age 0+per trap were
recorded.A decrease to 4.4 fish per trap was observed at this site in
October.
Chinook salmon juveniles were observed at over 50 percent of the habitat
location sites surveyed in the Cook Inlet to Talkeetna reach from June through
September,1981 (Figure E.3.1.7).The highest incidence of juvenile chinook
salmon was recorded during early July and late September when over 75 percent
of the sites surveyed produced fish.Ten (37.0%)of the habitat location
sites in this reach showed a 100 percent incidence of juvenile chinook salmon
for the surveys,while 19 (70.4%)of the sites had at least a 50 percent
incidence of occurrence.
E-3-26
,60 --.----"71:;:-+-;'C:L'iHTI·N:i;O~O;;-K -;:S~A;-;LM:-;::O~N---------~'
Tl
AUGUST SEPTEMBERJULY
I I
-
-
-
-
-
I I I I II.0
1I JUNE
'._~_~..I
Figure E.3.1.6.Percent incidence of chinook salmon (age 1+)captured at habitat location sltes on the
Susitna River between Talkeetna and Devil Canyon,June to September,1981.
.p
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T
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CI
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N......
0
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C
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- - - - - --_.---- -- - - -- -
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Table E.3.1.8.Chinook salmon (age 0+)catch per unit effort at selected
fish habitat location sites on Indian River and Portage Creek,
June,August,and October,1981.
Selected INDIAN RIVER PORTAGE CREEK
Fish Catch per trap day Catch per trap day
Habitat River June Aug.Oct.River June Aug.Oct.
Site Mile 1-15 16-31 1-15 Mile 1-15 16-31 1-15
Site 1 2.7 0.1 5.9 1.7 4.5 0.0 10.4 4.4
Site 2 7.2 0.0 7.0 1.9 9.2 0.0 0.5 0.6
Site 3 13.5 0.0 15.6 0.0
Site 3A 12.0 4.4 2.9 15.5 0.0 0.0
E-3-28
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80~JUVENILE CHINOOK SALMON
P
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A 60C
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N
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m NICW
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0
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N
C
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0
JUNE JULY AUGUST SEPTEMBER
Figure E.3.1.7.Percent incidence of chinook salmon juveniles captured at habitat location sites
on the Susitna Ri.ver betw~Bn Cook Inlet and Talkeetna,June to September,1981
- - - - - --_.-- - - - - - ----
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Figure E.3.1.8 provides the percent incidence by tributary mouth and mainstem
slough habitat location sites for juvenile chinook salmon between Cook Inlet
and Talkeetna.Tributary mouth habi tat 1ocati on site catches i 11 ustrated a
high incidence of occurrence throughout the summer ranging from 60.0 percent
of the sites sampled in early June to 93.3 percent in early July.The percent
incidence of juvenile chinook salmon in mainstem and slough habitat location
site catches ranged from 27.3 percent in early August to 87.5 percent in late
September.
Catches during the June through September surveys were generally higher at
tributary location sites than those observed at mainstem river or slough sites
in this reach.The highest catch rate for juvenile chinook salmon between
Cook Inlet and Talkeetna was 23.5 fish per trap recorded at Montana Creek {RM
77 .O}during the first two weeks of August.Catch rates were highest from
late June through August while catch rates at most sites decreased in
September {Table E.3.1.9 and Appendix Table EB-1.1}.
Nine selected fish habitat sites were sampled between Cook Inlet and Devil
Canyon during the summer surveys {Table E.3.1.10}.Juvenile salmon were
observed in a clearwater slough adjacent to the Gold Creek camp {R.M.136.8}
following a high water period in July.A single minnow trap was set overnight
in September 200 feet upstream from the slough mouth to identify the juveniles
present.A total of 32 chinook salmon age 0+were captured providing the
highest catch rate for the 1981 study.
E-3-30
MAINSTEM SITES
Z100-
-
I -
N -
C -
I SO-
D -
E -
N -
C -
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JUNE I ~II ~uGUSf S~TEMbER I
TRIBUTARY SITES
Z100--
-
I -
N -
C -
I SO-
D -
E -
N -
C -
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JUNE
I IJULY I J J 1 1 I
I AUGUST SEPTEMBER
Figure E.3.1.8.Percent incidence of juvenile chinook salmon at
habitat location sites on the mainstem Susitna River
and its tributary mouths between Cook Inlet and Tal-
keetna,June to September,1981
E-3-31
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I Table E.3.1.9.Chinook salmon juveniles,catch per unit effort at habitat
location sites on the Susitna River between
I Cook Inlet and Talkeetna,
June to September,1981.
I Catch per trap day
River June June July July Aug Aug Sept Sept
Habitat Location Mile 1-15 16-30 1-15 16-31 1-15 16-31 1-15 16-30
I Alexander Creek A 10.1 0.0 0.7 0.6 0.0 0.2 0.0
I Alexander Creek B 10.1 0.6 1.6 0.0 0.4 0.6
Alexander Creek C 10.1 0.4 0.7 0.5 0.1 0.2 0.2
I Anderson Creek 23.8 0.1 0.0 0.1
0.0 0.0 0.0
0.2 0.0
Kroto Slough Mouth 30.1 0.0 0.0 0.0
0.0 0.0 0.0 0.0 0.0
I Mainstem Slough 31.0 0.0 0.0 0.0 0.0 0.0 0.3
I Mid Kroto Slough 36.3 0.0 0.0 0.2
0.0 0.0 0.0
Deshka River A 40.6 0.0 4.5 1.6 0.1 0.1 0.1 0.0
I Deshka River B 40.6 0.2 4.5 2.2 0.2 0.3
0.2 0.2
Deshka River C 40.6 2.6 0.6 0.8 0.1 0.3 0.1
I Lower Delta Islands 44.0 0.1 0.0 0.0 0.0
I Little Willow Creek 50.5 2.7 .3.6 12:0 3.2 3.6 0.3 0.4
Rustic Wilderness 58.1 1.0 0.6 0.2 0.1
I Kashwitna River 61.0 13.2 0.4 2.7 1.6 0.9 2.0
Caswell Creek 63.0 1.9 2.5 11.9 7.7 9.4 3.2
I Slough West Bank 65.6 0.0 0.0 0.1
I Sheep Creek Slough 66.1 0.1 0.2 1.3 1.4 2.4 0.1
Goose Creek 1 72.0 3.9 2.1 17.8 1.7 2.1 0.3
I Goose Creek 2 73.1 4.5 0.2 1.4 1.1
Mainstem West Bank 74.4 0.0 0.0 0.0 0.0 0.1 0.1
I Montana Creek 77 .0 2.9 6.4 14.5 23.5 6.9 1.0 3.2
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E-3-33
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Table E.3.1.10.Chinook salmon juveniles,catch per unit effort at selected
fish habitat sites on the Susitna River between
Cook Inlet and Devil Canyon,
June through September,1981.
Selected Fish River Catch per
Habitat Si te Mile Date Trap Day
Fish Creek Mouth 7.0 6/21-23 0.0
Fish Creek (Kroto Slough)31.4 8/11-12 0.0
Hhitsol Lake Slough Mouth (Kroto Slough)35.2 8/10-11 0.0
Mainstem Susitna Slough 72.3 9/9-10 4.0
Beaver Slough West Bank 78.6 7/8-9 0.0
Side Channel West Bank 79.2 7/8-9 0.0
West Bank Slough 79.8 7/8-9 0.0
Rabideux Creek 83.2 6/18-20 0.0
Slough Adjacent to Gold Creek Camp 136.8 9/16-17 32.0
E-3-34
3.1.5.2 Age and Length Composition
.Two age classes of juvenile chinook salmon were collected at habitat location
sites in the lower Susitna River from June to September,1981,and represent
brood years 1979 and 1980.
One thousand four hundred eighty one juvenile chinook salmon were measured for
total length in millimeters (mm)during June to September between Talkeetna
and Devil Canyon.Juvenile chinook salmon collected in this reach were
separated into age classes 0+and 1+using size frequency distribution and
scale analysis.The percent length frequency for juvenile chinook salmon by
two week period in this reach is presented in Figure E.3.1.9.A length of
70 mm was determined to represent the minimum length of chinook salmon age 1+
in th is reach for the fi rst two weeks of June.The mi nimum 1engths for
chinook salmon age 1+for late June,early July,and late July were set at
75 mm,80 mm,and 85 mm respectively.No chinook salmon age 1+were captured
between Talkeetna and Devil Canyon after the last two weeks of July.
The mean length and range of lengths for chinook salmon age 0+and 1+by two
week sampling periods captured between Talkeetna and Devil Canyon is presented
in Table E.3.1.11.Chinook salmon age 0+showed a mean length increase from
50.7 mm in early June to 67.0 mm in late September.Chinook salmon age 1+in
this reach had a calculated mean length of 90.2 mm to 92.2 mm and ranged from
78 mm to 108 mm during June and July.
E-3-35
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--------------_._---
.n-,
"lu1y 1-15
N II 54
I
'"
21i1
se
n
June 1-15
N •19
fl,r!l8
48>u
ffi S8
:Jo
W ZIiIex
IL.
~11i1
July 16-31
N II 94
1..1 ,,M
i , i •I I I I i I I
o 1S 38 ..5 e0 7&&0 10&128 135 1&8
LENGTH Cmm)
Ie
28
ae
n
June 16-30
N •24
nn1-
,...-.....--.-.....--.....-.....--....-...,,...--....-....,...--,
e 16 30 45 fie 76 ge 116 120 136 161
LENGTH Cmm)
'--'---l , , I I I I , I
B 16 38 45 ea 7&&8.1a&12e 135 Ise
&0
..iii>-u
ffi Slil
:Jo
W 21i1ex
~
~1e
I'Tl
I
W
I
~
Figure E.3.1.9.Length frequency composition of juvenile chinook salmon captured at habitat
location sites on theSusitna River between Talkeetna and Devil Canyon,
June to September,1981.Lengths are total.
September 1-15
N •228
, , , , , I -I---.---.-----.~
8 IS sa ..5 88 75 ga las 120 136 ISO
a
la
611
sa
4aAugust1-15
N•255
, , , , ,,-~--,--.---,----,--_.,
8 IS 38 45 8a 7S ga las 12a 13S lsa
a
4a>-u
ffi sa:>o
lIJ 211IXIi.
:'<111
l-------r 1 ---.-------l-------.-~-r---I---I__.-I
8 16 sa ..5 aa ~S g0 I as 12a 135 I SO
L.ENGTH (mm)
I I I I -'--1--r-------.-.-----,-~
e 16 S0 45 ee 76 gra 10S 120 136 160
L.ENGTH emm)
SII.,se
/TI
Iw August 16-31 .n'l September 16-30I.ojWgSII
N •336 N •471......
sa
::l
0
lIJ 2'1 ~I ,20IXIi.K])~la
e"--,-
Figure E.3.1.9.
(continued)
Length frequency composition of juvenile chinook salmon captured l at habitat
location sites on the Susitna River between Talkeetna and Devil Canyon,
June to September,1981.Lengths are total.
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Table E.3.1.11.Chinook salmon juveniles,age -length frequency at habitat
location sites on the Susitna River between
Talkeetna and Devil Canyon,
June to September,1981.
Age 0+Age 1+
Number Mean Range of Number Mean Range of
of Length Length of Length Length
Date Fish (mm)(mm)Fish (mm)(mm)
June 1-15 6 50.7 40-63 13 90.2 78-105
June 16-30 5 45.8 32-60 19 92.0 80-108
July 1-15 49 52.0 39-76 5 92.2 88-96
July 16-31 93 55.6 42-78 1 91
Aug.1-15 225 57.7 43-84 0
Aug.16-31 336 62.0 41-94 0
Sept.1-15 228 64.9 47-93 0
Sept.16-30 471 67.0 42-108 0
E-3-38
Eight hundred forty juvenile chinook salmon were measured for total length in
Indian River and Portage Creek from June through October and were all from the
1980 brood class,age 0+.Mean lengths for chinook salmon age 0+for these
streams during the first two weeks of June was 40.8 mm with a range from 39 mm
to 43 mm'while during the last two weeks of September and the first week of
October,mean lengths had increased to 70.0 mm with a range from 54 mm to
108 mm (Figure E.3.1.10).
Two age classes of juvenile cbinook salmon were present in habitat location
site catches made during early June between Cook Inlet and Talkeetna.
Analysis of length frequency composition by two week periods for 3,646
juvenile chinook salmon measured during June through September indicates that
age 1+chinook salmon were no longer present in this reach after August 31
(Figure E.3.1.11).Age 0+chinook salmon were present throughout the summer.
The range of lengths for age 0+and age 1+can be approximated from the length
frequency data,however it is impossible to determine the extent of overlap or
accurately establish a point of division between these two ages of chinook
salmon in the Cook Inlet to Talkeetna reach of the Susitna River from length
frequency alone.
A comparison of the range of lengths for Deshka River juvenile chinook salmon
in 1980 and 1981 indicate the lack of captures of the smaller age 0+chinook
salmon during 1981.Juvenile chinook salmon ranged from 72 mm to 90 mm in the
Deshka River from its mouth to 3.5 miles upstream in 1981 while the fish
ranged from 49 mm to 95 mm in this same reach in 1980.The smallest juvenile
chinook salmon captured on the Deshka River in 1981 was 62 mm while the
smallest recorded in 1980 was 39 mm.
E-3-39
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---------_.-------,--
r~-l_________.-I----r-________._----I--~I---~r----r ---~
8 IS 38 -45 88 75 98'18S 128 t 3S 168
r--~l--I--r---1--~r-T---------.-----l-r 1
8 16 38 ..5 8e 76 08 t as I 2a 13S 168
51]sa
~..8
June 1-15 ..a 1 July 1-15
N 1;1 68 N 1;1 623
~38 n sa
::J
0
lLJ 28-i I I 2aIX
l.&.
~])'\Ie
8
,--r-----,-~r-I_____.--I--l--~I~--I---l
8 IS 38 ...5 60 75 98 10S t28 t3S 168
LENGTH Cmm)
r I r I I I I r I I I
8 16 38 ..5 e0 76 98 18S 128 13S 168
LENGTH Cmm:>
li8,lie
I"T1
I
(.oJ 'IJ June 16-30 ''''1 July 16-31I
g38
+:>0 N•509 N•1,3420
3a
::J
0
lLJ 28-4 2aIX
l.&.
~18-1 .-L....Ie
8...1 ,.---~8
Figure E.3.1.10.Length frequency composition of juvenile chinook salmon at habitat location
sites and selected fish habitat sites on Indian River and Portage Creek,
June to early October,1981.Lengths are total.
September 16-30.October 2-3
N •193 .
September,1-15
N •47 .
t8
e
e
28
4/ii1
S8
,Iii iii I I ,I
8 1&S8 ..5 68 75 &8 10S 128 135 IS8
&8
August 16-31
N •437
August 1-15
N•445
r---.-----T-~,---,-,,.-----1 I ,
8 IS 38 45'68 7&&8 18&128 135 IS8
sa
&
>-41i1
U
~S8
:Jo
I.LJ 2&Q:
L&.
~la
e
48>-U
~S8
:Jo
~21i1Q:
~
~IIiI
1TI
I
W
I
~
t-'
I -------r--~-.----.-~.------r-.--r I I I
B 16 ,a;<45 68 7&;'1 t 1lI&128 135 r68
LENGTH (m",)
Fi gure E.3.1.10.
(continued)
I I I I I I I '---1-----.----1
8 16 ,,,045 60 75 S0 185 120 135 IS0
LENGTH (mm)
Length frequency composition of juvenile chinook salmon at habitat location
sites and selected fish habitat sites on Indian River and Portage Creek,
June to early October,1981.Lengths are total.
-------------------
- - - - - - - - - - - - -..- - _...-
July 1·15
N a 623
8
I 1 Iii 1 iii 1 i
o IS sa 045 Ba 75 Sla 106 120 135 16a
LENGTH Cmm)
8
18
r~-,,-~---,----,-,--,~--cl----,--n,
I 0 15 '0 04S 80 7S 90 '0S 120 t 3S 160
S8
28
sa
June 1·15
N a 68
8
I I I 1111111 J
o 16 sa 45 ee 7&Sla lOS 120 135 150
LENGTH (mm)
8
I I I I I I I I I I I
B 15 3a ..5 80 75 Sl0 10S 120 135 150
S8
S8
..8>U
~sa::>o
w 28~
~18
rrI 'OJ June 16-30 ""1 July 16-31IgS0
w N &:I 509 N &:I 1 .342I
+:0 S8N::>
0
w 28-1 28ct
IA..
~18~~L 10
Figure E.3.1.11.Length frequency composition of juvenile chinook salmon captured at habitat
location sites on the Susitna River between Cook Inlet and Talkeetna,
June to September,1981.Lengths are total.
September 16-30
N a 193
September 1-15
N •47
r--,~--r-----.--r---,---,--I .-------.----1
8 16 '8 045 80 75 90 '06 120 136 158
LENGTH Cmm)
a
2a
sa
,a
..a
la
2a
o
iii ,iii I Iiio15S0045807.5 90 105 1~0 135 I 50
5a
Iaa
4fe
sa
August 16-31
N II 437
August 1-15
N II 445
a
i I I I Iii i ,i ,o 15 30 ..5 80 75 90 105 120 135 150
sa
a
I , , , , I I II I I
.8 ,6 38 4S .,0 76 ~8 ,86 ,28 ,35 IS0
LENGTH Crylm)
>-..a
u
~sa::>o
w 2a~
~Ia
sa
..0>-U
~S8
::lo
W 2aIX
"-
~,a
rT1
I
W
I
~
W
Fi gure E.3.1.11.
(continued)
Length frequency composition of juvenile chinook salmon captured at habitat
location sites on the Susitna River between Cook Inlet and Talkeetna,
June to September,1981.Lengths are total.
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Scale analysis conducted on juvenile chinook salmon captured during August and
September indicated that chinook salmon age 1+were present in the Cook Inlet
to Talkeetna reach during the last two weeks of August.Scale analysis
beginning in August showed five of 53 (9.4%)juvenile chinook salmon analyzed
to be age 1+fish while only one of 135 (0.7%)fish was observed to be age 1+
in late August.Chinook salmon age 1+were not observed in the subsample of
juvenile chinook salmon collected in September.
With no clear separation by age class being possible in 1981,the problem of
distinguishing brood class by length frequency analysis in the area between
Cook Inlet and Talkeetna becomes apparent when evaluated over time as shown in
Figure E.3.1.12.Chinook salmon juveniles captured at Indian River and
Portage Creek were all age 0+fish and showed a mean length increase of 30 mm
from June through September with a net mean length increase observed for each
sampling period.
Juvenile chinook salmon mean lengths for the Talkeetna to Devil Canyon reach
indicate a mean length decrease of 27 mm between the late June and early July
surveys.This decrease was caused by the outmigration of the larger age 1+
smolts.Age 1+fish were absent from this reach by the end of July as indi-
cated by an increase in mean length at this time.
The Cook Inlet to Talkeetna reach shows a continued decrease in mean 1ength
for juvenile chinook salmon through the last two weeks of July,with a small
increase beginning in August.Large numbers of chinook salmon age 1+were
present in this reach through late July creating a high calculated mean length
for juveniles.During the first two weeks of June,juvenile chinook salmon in
E-3-44
100
------",--
INDIPN RIVER &FURTAGE CREEK
TALJm'NA TO DEVIL CAmOO
COOK INI£T TO TALIffTNA---------_._-
,..'\,."\,.\~-~"""'''''',t"""-.........../"
\-----.------'-\----"
\
\
\
\
\
\
\
60
80
M
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N
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T
H'•
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<J1
L!O --I I I I I I I I I I I I I I I I I I i
i JUNE JULY AUGUST SEPTEMBER
Figure E.3.1.12.Mean length of juvenile chinook salmon captured at Indian River and Portage Creek,
and at the Susitna River between Talkeetna and Devil Canyon,and between Cook Inlet
and Talkeetna,June to September,1981.
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this reach had a mean length of 77 mm with a range of 56 mm to 94 mm.This is
essentially equal to the early September survey which showed chinook salmon to
have a mean 1ength of 77 mm and a range of 52 mm to 100 mm.Age I +fi sh
appear to have outmigrated from th'e Susitna River by the end of August,by
which time the age 0+fish had obtained a mean length equal to that calculated
in the fi rst two weeks of June when both age cl asses were present.It is
interesting to note that by late September,juvenile chinook salmon in all
reaches had a calculated mean length of approximately 70 mm,70.0 mm for
Indian River and Portage Creek,67.0 mm between Talkeetna and Devil Canyon,
and 70.8 mm between Cook Inlet and Talkeetna.
A comparison of 1981 Susitna Hydro studies juvenile chinook salmon data to
previous studies conducted on the Deshka River (Delaney,Hepler,and Roth
1981)and Montana'Creek (Riis and Friese 1978)illustrate a substantial
decrease in the abundance of age 0+chinook salmon observed at these sites in
1981.Catch rates for the Deshka River mouth to 1.5 miles upstream during the
summer of 1980 reached a high of 42.3 juvenile chinook salmon per trap during
late June while 1981 recorded a high catch rate of only 4.5 fish per trap
during early July in this same reach.
Similar results were observed at the mouth of Montana Creek.A high catch
rate of 69.3 juvenile chinook salmon per trap was recorded during the 1977
study while a high of 23.5 fish per trap was observed during 1981.Adult
escapement counts indicate an average return of chinook salmon for Montana
Creek during 1980 while hydraulic conditions precluded a count for the Deshka
River although initial assessments indicate a successful escapement for this
river in 1980.
E-3-46
A comparison of catch rates of threespine stickleback in the lower reach of
the Deshka River in 1980 and 1981 indicates a tremendous population increase
during the 1981 surveys.Up to 3.1·stickleback per trap were observed in 1980
while a high of 48.9 stickleback per trap was recorded in this same reach
during 1981.Results for stickleback in Montana Creek during 1977 are not
available but a high catch rate of 8.3 was observed during 1981.
Present and past surveys of the Susitna River and its tributaries indicate
juvenile chinook salmon populations are not static but varying in abundance
and distribution by river habitat type and seasonal period.
The redistribution of juvenile chinook salmon from areas of emergence to more
favorable habitat conditions begin as the fish reach a mobility size.Some
age 0+fish remain in the streams through the summer while others enter
the mainstem river and its associated clearwater sloughs.
Juvenile chinook salmon were observed at Indian River and Portage Creek
selected fish habitat sites during both summer and winter surveys.Tributary
mouths in the Talkeetna to Devil Canyon reach maintained an 80 to 100 percent
incidence of occurrence for juvenile chinook salmon during the summer surveys
while juveniles were observed at only 25 percent of these sites sampled during
the previous winter.
Mainstem river and slough habitat location sites in this reach had an 88
percent incidence of occurrence for juvenile chinook salmon during the winter
E-3-47
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surveys.Many of the sloughs were partially ice,free throughout the winter
and provided clear water habitat during much of the summer,providing
excellent year-round rearing conditions.Catches were consistently recorded
in these sloughs during the summer sampling,and juvenile chinook salmon
percent incidence for mainstem and slough sites increased from 20 percent in
late June to 88 percent in early September.As none of these sloughs are
known chinook salmon spawning areas,the juveniles observed at these sites had
migrated from associated spawning streams.
Juvenile chinook salmon were observed at 27 percent of themainstem and slough
habitat location sites in the Cook Inlet to Talkeetna reach during early
August and up to 88 percent of the sites in late September although catch
rates at these sites were considerably lower than those observed at mainstem
slough sites in the reach above Talkeetna during this same period.Winter
surveys in the lower reach averaged a 67 percent incidence at the mainstem and
slough sites.Although relatively small,it appears a portion of the juvenjle
chinook salmon population in the Cook Inlet to Talkeetna reach are present in
the mainstem river and sloughs throughout the year.
Sites associated with tributary mouths appear to provide important milling
areas for juvenile chinook salmon in the Cook Inlet to Talkeetna reach.
Consistently high catch rates were observed at most of these habitat locations
during this and previous studies.The dramatic change to clear water which
occurs during the winter makes the Susitna River and its sloughs·primary sites
of overwintering as icing and lowered instream flow conditions develop in the
tributary streams.
E-3-48
The mainstem river and associated sloughs provide a most important link in the
overwintering success of juvenile chinook salmon and the ultimate natural
survival of this species in the Susitna River.
E-3-49
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3.2 COHO SALMON JUVENILES
3.2.1 Abstract
Juvenile coho salmon,Oncorhynchus kisutch,were collected between Alexander
Creek (R.M.10.1)and Slough 21 (R.M.141.8)at 39 of 44 (88.6%)habitat
location and 16 of 55 (29.1%)selected fish habitat sites from November,1980
to October,1981.During this same period of time,juvenile coho salmon were
also collected at 5 of 19 (26.3%)selected fish habitat sites in Indian River
(R.M.138.6)and Portage Creek (R.M.148.8).
Three hundred thirty seven juvenile coho salmon were collected from the Cook
Inlet to Devil Canyon reach of the Susitna River during November to May;4,821
juvenile coho salmon were collected from this reach during June to October.
In Indian River and Portage Creek one juvenile coho salmon was collected
during winter sampling and 170 during summer.
The principal sampling gear utilized one quarter inch minnow traps baited with
salmon roe,accounted for over 99 percent of the total catch of juvenile coho
salmon.
Juveni 1e coho salmon from the Talkeetna to Devi 1 Canyon reach were aged by
correlating complementary length frequency and scale analysis data.Juvenile
coho salmon captured between Cook Inlet and Talkeetna could not be aged by
length frequency alone due to the extensive overlap in lengths for age classes
in this reach of the river.Additional scale analysis is necessary to provide
length age relationships for this reach.
E-3-50
The predominant age class for smolts in the Susitna River system is age 11+.
In the Talkeetna to Devil Canyon reach the majority of smolting took place
prior to June 1,1981 ~nd between Cook Inlet to Talkeetna by June 15.
Juvenile coho salmon in the Cook Inlet to Talkeetna reach of river occur more
frequently at tributary mouth sites than at slough and mainstem sites during
both winter and summer.In the Talkeetna to Devil Canyon reach,juvenile coho
salmon occurred more frequently at slough sites during winter and at both
tributary mouth and slough sites in summer.
The maximum catch rate for juveni 1e coho salmon recorded at the habitat
location and selective fish habitat sites during summer was 41.0 fish per trap
at Caswell Creek (R.M.63.0)in late August and during winter was 8.0 fish per
trap at Slough 6A in March.Catch rates of juvenile coho salmon collected
from Cook Inlet to Devil Canyon generally increased from winter to summer,
peaking in late August and early September.Catch rates then decreased in
late September indicating an apparent migration into lateral tributaries.
3.2.2 Introduction
Coho salmon,Oncorhynchus kisutch Walbaum,also known as silver salmon,is one
of five Pacific salmon native to the Susitna River drainage.In North
America,coho salmon are native to streams extending from Point Hope,Alaska
south to Monterey Bay,California (Scott and Crossman 1973).In Alaska,coho
salmon commonly spawn in coastal streams within 150 miles of the sea,however,
E-3-51
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they are also known to spawn in the Tanana (Pearse 1974)and Porcupine (Geiger
1975)river drainages,both major tributaries of the upper Yukon River
approximately 1,000 miles upstream from salt water.
Coho salmon inhabit the Susitna River drainage below Devil Canyon (RM 152.0)
and although adults of the species are considered common,the extent of its
spawning and rearing distribution is not well known,particularly with regard
to the mainstem Susitna River.The peak of the coho salmon migr~tion into the
Susitna River drainage occurs in mid-July and early August,but extends from
late June into September.Spawning takes place from late August through
October (Barrett personal communication 1981).
Upon emergence in Ma rch and April,the maj ority of fry spend one to three
years in fresh water (Wallis 1968);preferred habitat includes areas of low
velocity.These areas provide adequate cover,low water velocities,and
moderate water temperatures for optimum growth (Gray et ale 1978;Delaney and
Wadman 1979;Watsjold and Engel 1978).
Aquatic drifting immature stages of terrestrial insects are the predominant
diet of juvenile coho salmon in the spring while adult stages of these insects
predominate during the summer and fall (Riis and Friese 1978).Juvenile pink,
chum and sockeye salmon can be an important supplemental food source to age I
or older coho salmon (Roos 1960;Scott and Crossman 1973).
Juvenile coho salmon are identified by eight to 12 parr marks,which are
centered along the lateral line and narrower in width than the area between
them.The adipose fin is clear and uniformly spotted while the caudal and
E-3-52
anal fins are reddish orange in color.The body coloration is blue-green on
the dorsal surface,changing to silver and white on the sides and the ventral
surface.Actual coloration however,may vary from one population to another.
In Alaska streams,coho salmon smolt migration to sea is from March to July
with the peak during April and May (Meehan and Siniff 1962;Elliot 1976).The
predominant age class for smolts in the Susitna River system is age II+;
identified by two annulus checks (Delaney et ale 1981;Adult Anadromous
Investigations,Alaska Department of Fish and Game Su Hydro Studies 1981;
Kubik and Wadman 1978).Wallis (1968)observed mean total lengths for coho
salmon smolts to range from 95 to 120 mm,however he also found smolts can
range from 65 to 170 mm.
During smoltification,the juveniles undergo a physiological change in pre-
paration for salt water.At this time,their body coloration changes to a
bright silver and their parr marks fade.It appears that larger than average
sized individual smolts migrate first (Delaney and Wadman 1979).Migration is
usually in small schools and occurs nocturnally (Meehan and Siniff 1962).
3.2.3 Methods
Juvenile coho salmon were collected in the lower Susitna River habitat
location sites from Alexander Creek (RM 10.1)to Slough 20 (RM 140.1),and at
selected fish habitat sites from R.M.39.0 to R.M.141.8,Indian River (RM
138.6)and Portage Creek (RM 148.8)during 1980-81.One fourth inch minnow
traps baited with preserved salmon roe were the principal sampling gear
E-3-53
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utilized and accounted for over 99 percent of the total juvenile coho salmon
catch.Beach seines,variable mesh gillnets and electrofishing units
accounted for the small number of remaining fish caught.For the purposes of
this study,only minnow trap catch'results will be used to reflect relative
abundance.
A subsample of each age juvenile coho salmon was measured to determine average
total length in millimeters (mm)during each month for November,1980 to May,
1981 and each two weeks for June to September,1981.Juvenile coho salmon age
determinations were made by correlating complementary length frequency and
scale analysis data.Discussion of distribution and relative abundance is
provided by age class for juvenile coho salmon in the Talkeetna to Devil
Canyon reach only.Due to the extensive overlap in lengths for age classes of
juvenile coho salmon captured downstream of Talkeetna,distribution and
relative abundance for all age classes will be discussed collectively for this
reach.
Juvenile coho salmon data presentation will be grouped by month for November,
1980 to May,1981 and by two week period for June to September,1981.
3.2.4 Results and Discussion -Winter
3.2.4.1 Distribution and Relative Abundance
Juvenile coho salmon were collected at 17 of 30 (57.7%)habitat location and
16 of 46 (34.8%)selective fish habitat sites in the lower Susitna River from
E-3-54
November,1980 to May,1981.Juvenile coho salmon were also observed at one
of 11 (9.1%)selected fish habitat sites on Indian River (R.M.138.6)and
Portage Creek (R.M.148.8)from February to April,1981.
Sampling conducted from November,1980 to May,1981 between Cook Inlet and
Talkeetna collected 151 juvenile coho salmon at 21 of 34 (61.8%)habitat
location and selective fish habitat sites.
Juvenile coho salmon were captured at a total of 11 of the 18 (61%)habitat
location sites sampled in the Cook Inlet to Talkeetna reach from November to
May.During this time,juvenile coho salmon were collected at two of six
(33%)mainstem habitat location sites and nine of 12 (75%)tributary mouth
habitat location sites.Juvenile coho salmon occurred in greater than 40
percent of the habitat location site catches each month from November to May
except during December and April when no catch was recorded (Table E.3.2.1).
Limited sampl ing effort was expended during these two months due to extreme
cold and dangerous ice travel conditions respectively.
Juvenile coho salmon were also collected at ten of 16 (62.4%)selected fish
habitat sites between Cook Inlet and Talkeetna from November to May.
The highest individual catch per unit effort in the Cook Inlet to Talkeetna
reach was 1.2 fish per trap day observed at the habitat location site Sunshine
Creek mouth (RM 85.7)in November,1980 (Table E.3.2.2 and Appendix Table
EB-2.1).Relatively high catch rates at habitat location sites were also
recorded for a side channel site located near Rustic Wilderness (RM 58.1)in
January and March,and at the mouth of Montana Creek (RM 77.0)in November.
E-3-55
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Table E.3.2.1.Coho salmon juveniles,percent incidence at habitat
location sites on the mainstem Susitna River and its tributary
mouths between Cook Inlet and Devil Canyon,
November,1980 to May,1981.
Percent Incidence
Nov.Dec.Jan.Feb.Mar.Apr.May
Cook Inlet
O.ObtoTalkeetna83.3 O.Oa 42.9 60.0 63.6 57.7
Tributary
Mouth Sites 100.0 0.0 66.7 66.7 66.7 0.0 83.3
Mainstem and
Slough Sites 50.0 0.0 25.0 50.0 50.0 0.0 50.0
Talkeetna to
Devil Canyon 0.0 42.9 50.0 42.9
Tributary
Mouth Sites 0.0 0.0 25.0 0.0
Mainstem and
Slough Sites 0.0 75.0 66.7 50.0
a Extreme cold (-25°to -40°F)hampered sampling efforts during December,1980.
b Hazardous ice conditions prior to spring breakup limited sampling efforts to
three habitat location sites in April,1981.
E-3-56
Table E.3.2.2.Coho salmon juveniles,catch per unit effort at habitat location
sites on the Susitna River between Cook Inlet and Talkeetna,
November,1980 to May,1981.
River Catch per trap day
Habitat Location Mile Nov Dec Jan Feb Mar Apr May
Alexander Creek Site A 10.1 0.3 0.1
Alexander Creek Site B 10.1 0.3
Deshka River Site A 40.6 0.0
Trace
Deshka River Site B 40.6 0.0 0.0
Deshka River Site C 40.6 0.1
Little Willow Creek 50.5 0.0
Rustic Wilderness 58.1 0.1 0.6 0.7 0.1
Kashwitna River 61.0 0.1 0.0
Caswell Creek 63.0 0.2 0.1
Sheep Creek Slough 66.1 0.0 0.0
Mainstem West Bank 74.4 0.3
Montana Creek 77 .0 0.4 0.1 0.2 0.1
Mainstem 1 84.0 0.0 0.0 0.0 0.0
Sunshine Creek 85.7 1.2 0.0 0.0 0.0 1.0 0.0 0.3
Birch Creek Slough
(Mouth)88.4 0.0
Mouth of Birch
Creek 89.2 0.2 0.1 0.2
Cache Creek Slough 95.5 0.0 0.0
0.0 0.0
Cache Creek 96.0 0.0
E-3-57
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The maximum catch rate at selected fish habitat sites was 0.5 juvenile coho
salmon per trap occurring at a beaver pond adjacent to the mouth of the Deshka
River (R.M.40.6)in March (Table E.3.2.3).
Sampling conducted between Talkeetna and Devil Canyon during November to May
captured 147 coho salmon from the brood year 1979 (1+)and 39 from the brood
year 1978 (11+)at 12 of 42 (28.6%)habitat location and selected fish habitat
sites.
Juvenile coho salmon were captur~d at six of the 12 (50%)habitat location
sites sampled between Talkeetna and Devil Canyon during December,1980 to
April,1981.During this time,juvenile coho salmon were collected at five of
eight (62%)mainstem and slough habitat location sites and at one of four
(25%)tributary mouth habitat location sites.
Of the four tributary mouth habitat location sites sampled in the Talkeetna to
Devil Canyon reach,juvenile coho salmon were found only during the March
sampling of Whiskers Creek (RM 101.4)(Table E.3.2.1).No juvenile coho
salmon were encountered at the mouths of either Lane Creek (RM 113.6),Indian
River (RM 138.6)or Portage Creek (RM 148.8)in 1980-81 winter sampling.
Juvenile coho salmon were present at 50 percent or more of the mainstem and
slough habitat location sites sampled in the Talkeetna to Devil Canyon reach
each month from February,1980 to April,1981.
Coho salmon (Age 1+)were collected at all six of the habitat location sites
observing juvenile coho salmon between Talkeetna and Devil Canyon during·
E-3-58
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winter 1980-81 sampling.Coho salmon {Age II+}were collected at three of the
six sites at which juvenile coho salmon were observed.The three sites where
both age classes of juvenile coho salmon were observed were Whiskers Creek
{R.M.101.4},Slough 10 {R.M.133.8J and Slough 8A {125.3}.
In the Talkeetna to Devil Canyon reach juvenile coho salmon were captured at
six of 30 {20%}selected fish habitat sites.Coho salmon {Age I+}were
collected at all six of the sites where juvenile coho salmon were observed.
Five of the six sites were sloughs:Slough 9 {R.M.128.9}during ~1arch and
April,Slough 16 {R.M.137.7}in March,and Slough 17 {R.M.138.9}and Slough
21 {R.M.141.8}in February.Coho salmon {Age I+}were also observed at a
mainstem site,R.M.98.8 to 101.6,during March.Coho salmon {Age II+}were
collected at only one of the 30 {3.0%}selected fish habitat sites between
Talkeetna and Devil Canyon.These juvenile coho salmon were collected at R.M.
98.8 to 101.6 during March.
Five selected fish habitat sites in Indian River (Indian RM 0.5 to 8.0)and
six selected fish habitat sites in Portage Creek {Portage RM 3.0 to 11.8}were
sampled in February,March and April 1981.A single juvenile coho salmon was
collected at Indian (Indian RM 0.5)during April.No juvenile coho salmon
were encountered in Portage Creek at these times.
The highest individual catch per unit effort for juvenile coho salmon col-
lected between Talkeetna and Devil Canyon occurred at Slough 6A {R.M.112.3}
in March,where 8.0 coho salmon from the brood year 1979 were collected
{Tables E.3.2.4 and E.3.2.5;Appendix Tables EB-2.2 and EB-2.3}.Relatively
high catch rates for coho salmon {Age I+}were also observed at habitat
E-3-60
Table E.3.2.4.Coho salmon juveniles,catch per unit effort at habitat location
sites on the Susitna River between Talkeetna and Devil Canyon,
November,1980 to May,1981.
Catch per unit effort for coho salmon fro~the 1979 brood year,Age I+.
Catch per trap day
Habitat Location Mile Nov Dec Jan Feb Mar Apr May
Whisker Creek Slough 101.2 0.0
Whisker Creek 101.4 0.0 1.7
Slough 6A 112.3 8.0
Lane Creek 113.6 0.0
Susitna Curry 120.7 0.0
Susitna Side Channel 121.6 0.0 0.0
Slough 8A 125.3 0.0 0.0 0.2 0.1
Slough 10 133.8 0.0 0.2 0.1 0.0
Slough 11 135.3 0.0 0.1 0.0 0.3
Indian River 138.6 0.0 0.0 0.0 0.0
Slough 20 140.1 0.1 0.2 0.3
Portage Creek 148.8 0.0 0.0
Catch per unit effort for coho salmon from the 1978 brood year,Age 11+.
Catch per trap day
Habitat Location Mile Nov Dec Jan Feb Mar Apr May
Whisker Creek Slough 101.2 0.0
Whisker Creek 101.4 0.0 0.7
Slough 6A 112.3 0.0
Lane Creek 113.6 0.0
Susitna Curry 120.7 0.0
Susitna Side Channel 121.6 0.0 0.0
Slough 8A 125.3 0.0 0.0 0.3 0.1
Slough 10 133.8 0.0 0.0 0.1 0.0
Slough 11 135.3 0.0 0.0 0.0 0.0
Indian River 138.6 0.0 0.0 0.0 0.0
Slough 20 140.1 0.0 0.0 0.0
Portage Creek 148.8 0.0 0.0
E-3-61
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I Table E.3.2.5.Coho salmon juveniles,catch per unit effort at selected fish
habitat sites on the Susitna River between Talkeetna and Devil Canyon,
I January to April,1981.
I Catch per unit effort for coho salmon from the 1979 brood year,Age 1+.
Selected Fish River Catch per trap day
I Habitat Site Mile Jan Feb Mar Apr
Mainstem Susitna
I at Chulitna River 98.8-101.6 0.0 0.0 0.4
Oxbow II 119.2 0.0
I Mainstem Susitna 121.0 0.0
Susitna Side Channel 125.0 0.0 0.0
I Slough 8A (upper reach)126.1 0.0
I Mainstem Susitna
below Slough 9 127.8 0.0
I Slough 9 (lower reach)128.5 0.0 0.0 0.0 0.0
Slough 9 (middle reach)128.9 0.3
I Slough 9 (upper reach)129.2 0.1
Susitna Side Channel 130.2 .0.0
I Mainstem Susitna 131.0 0.0 0.0 0.0
I Susitna Side Channel 131.1 0.0 0.0
Beaver Stream above
I
Fourth of July Creek 131.4 0.0 0.0
Slough 9A (lower reach)133.3 0.0 0.0 0.0 0.0
I Mainstem Susitna 133.4 0.0 0.0 0.0
Mainstem Susitna
I below Slough 10 133.6 0.0
Mainstem Susitna
below Slough 11 134.3 0.0
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Catch per unit effort for coho salmon from the 1978 brood year,Age 11+
Table E.3.2.5 (Continued)
Selected Fish River
Habitat Sites Mile
Susitna Side Channel 135.3
Slough 11 (headwaters)135.8
Slough 14 136.0
Susitna Side Channel 136.1
Mainstem Susitna 136.7
Gold Creek Confluence 136.7
Mainstem Susitna 136.8
Slough 16 137.7
Mainstem Susitna 138.6
Slough 17 138.9
Mainstem Susitna 139.3
Susitna Side Channel 141.3
Slough 21 141.8
98.8-101.6
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Apr
MayApr
0.10.0
0.0
0.0
Catch per trap day
Jan Feb Mar
0.0
0.0 0.0
0.0 0.0
0.0
0.0
0.0 0.0 0.4 0.0
0.0 0.0 0.0
0.1 0.0 0.0
0.0
0.0 0.0 0.0
0.4 0.0 0.0
Jan Feb Mar
E-3-63
DecNovMile
Mainstem Susitna
Only one selected fish
site recorded from the
above 30 sites
Selected Fish
Habitat Sites
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location site Whiskers Creek mouth (R.M.101.4)in March,at selected fish
habitat sites from R.M.98.8-101.6 in March,and Slough 16 (R.M.137.7)and
Slough 21 (R.M.141.8)in February.Relatively high catch rates for coho
salmon (Age 11+)also occurred at Whiskers Creek mouth in March.
3.2.4.2 Age and Length Composition
Length frequency and scale analysis indicates two age classes of juvenile coho
salmon,from brood years 1978 and 1979,were captured at habitat location
sites on the lower Susitna River from November,1980 to May,1981 (Figures
E.3.2.1 and E.3.2.2).Although an inflection point is visible in Figure
E.3.2.1 at 105 mm between salmon of brood years 1978 and 1979 captured between
Cook Inlet and Talkeetna during winter sampling,for purposes of this study
these brood years will be discussed collectively for this reach of river.An
inflection point occurs at approximately 110 mm between coho salmon of brood
years 1978 and 1979 in the Talkeetna to Devil Canyon reach.
Ninety six juvenile coho salmon collected between Cook Inlet and Talkeetna
during November to May ranged in lengths from 58 mm to 149 mm with a mean of
98.9 mm (Table E.3.2.6).
One hundred fifteen coho salmon collected from the 1979 brood year between
Talkeetna and Devil Canyon during January to April ranged in lengths from
56 mm to 108 mm with a mean of 90.3 mm.Thirty one coho salmon from the brood
year 1978 collected at this time and in the same reach of river ranged in
lengths from 110 mm to 152 mm with a mean of 126.2 mm.
E-3-64
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16 32 48 64 80 96 112 128 1 44 160
n =242
n =146
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16 32 48 64 80 96 1 12 1 28 1 44 160
E-3-65
n
Cook Inlet
to
Talkeetna
n =96
Cook Inletto
Devil Canyon
Talkeetna
to
Devil Canyon
25
>-20U
Z
W 15::Ja
w 10~
IJ...
~5
0
I
0
25
>-20
U
Z
W 15:Ja
w 10~
I.L..
~5
0
I
0
25
>-20U
Z
W 15:Ja
w 10~
I.L..
~5
0
I
0
I I I I I I I I
16 32 48 64 80 96 112 128 144 160
LENGTH (mm)
Figure E.3.2.1.Length frequency composition of juvenile coho salmon
at habitat location sites on the Susitna River between
Cook Inlet and Talkeetna,and between Talkeetna and
Devil Canyon,December 1980 to March,1981.Lengths
are total.
Coho Aqe 0+
December 1980 to March 1981
N=21
Range 82-114 ITIJI
E-3-66
Coho Age 1+
December 1980 to March 1981
N=28
Range 95-152 ITIII
I 1 I I j ·1 I I .1o163248648096112128144160
LENGTH (mm)
Figure E.3.2.2.Age-length frequency composition of juvenile
coho salmon on the Susitna River between Cook
Inlet and Devil Canyon,December 1980 to March,
1981.Age detenmined by scale analysis.
Lengths are total.
I I I I I I I I I I Io163248648096112128144160
o
50
~10.
o
50
>-40
U
Z
W30::>o
~20
1L
~10
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Table E.3.2.6.Coho salmon juveniles,age-length analysis at habitat
location sites on the Susitna River between Cook Inlet and Devil Canyon,
November,1980 to May,1981.
Cook Inlet to Talkeetna
All Juvenile coho salmon
Talkeetna to Devil Canyon
Brood Year 1978 (Age 11+)
Brood Year 1979 (Age 1+)
All juvenile coho salmon·
Cook Inlet to Devil Canyon
All juvenile coho salmon
NO.OF FISH
SAMPLED
96
31
115
146
242
E-3-67
MEAN LENGTH (MM)
98.9
126.2
90.3
97.9
98.3
RANGE (MM)
58-149
110-152
56-108
56-152
56-152
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3.2.5 Results and Discussion -Summer
3.2.5.1 Distribution and Relative Abundance
Juvenile coho salmon were collected at 38 of 44 (86.4%)habitat location and 0
of 9 (0 ..0%)selective fish habitat sites on the lower Susitna River from June
to September,1981.Juvenile coho salmon were also observed at four of eight
(50%)selected fish habitat sites on Indian River (R.M.138.6)and Portage
Creek (R.M.148.8)from June to October,1981.
Sampling conducted from June to September collected 3,605 juvenile coho salmon
between Cook Inlet and Tal keetna at 25 of 35 (71.4%)habitat location and
selected fish habitat sites.
Juvenile coho salmon were collected at 25 of the 27 (92.6%)habitat location
sites in the Cook Inlet to Talkeetna reach during June to September.The
incidence of juvenile coho salmon in catches at habitat location sites ranged
from 42.9 percent in late June to 83.3 percent in early September (Figure
E.3.2.3).Juvenile coho salmon catches were recorded at all of the tributary
mouth habitat location sites (100%)in the Cook Inlet to Talkeetna River reach
one or more times during the summer of 1981.The incidence of juvenile coho
salmon .in catches at tributary mouth habitat location sites ranged from 66.7
percent in late June to 100 percent in late August and early September (Table
E.3.2.7).
Catches of juvenile coho salmon were recorded at 82 percent of the mainstem
and slough habitat location sites in the Cook Inlet to Talkeetna reach from
E-3-68
"':
100-,JUVENILE .COHO SALMON
~
SEPTEMBERAUGUSTJULYJUNE
o
I
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I
-
P
E
~75
E
N
T
I 50
l"T1 N
I C.W
I
O'l I1.0
0
E 25
N
C
E
Figure E.3.2.3.Percent incidence of coho salmon juveniles captured at habitat location sites on the
Susitna River between Cook Inlet and Talkeetna,June to September,1981.
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Table E.3.2.7.Coho salmon juveniles,percent incidence at habitat location
sites on the mainstem Susitna River and its tributary mouths between
Cook Inlet and Talkeetna,June to September,1981.
Percent Incidence
June June July July Aug.Aug.Sept.Sept.
1-15 16-30 1-15 16-31 1-15 16-31 1-15 16-31
Tributary (mouth)80.0 66.7 80.0 81.3 93.8 100.0 100.0 91.7
Habitat Sites
Mainstem 40.0 11.1 55.6 20.0 18.2 22.2 50.0 62.5
Habitat Sites
Combined 60.0 42.9 70.8 57.7 63.0 72.0 83.3 80.0
Habitat Sites
E-3-70
June to September.The incidence of juvenile coho salmon at mainstem and
slough habitat location sites ranged from 11.1 percent in late June to 62.5
percent in late September.
Eight selected fish habitat sites were also sampled during June to September
between Cook Inlet and Talkeetna resulting in no juvenile coho salmon being
captured (Table E.3.2.8).
The highest catch per unit effort between Cook Inlet and Tal keetna t 41.0
juvenile coho salmon per trapt was recorded at the mouth of Caswell Creek (RM
63.0)in late August (Table E.3.2.9).Relatively high catch rates were also
observed at the mouths of Birch Creek (RM 89.2),Sheep Creek Slough (RM 66.1),
Sunshine Creek (RM 85.7)and Montana Creek (RM 77.0)in late July to early
September (Appendix Table EB-2.1).
Between Talkeetna and Devil Canyon 1 t 138 coho salmon from the brood year 1980
(Age O+)and 78 (Age I+)were collected at 12 of 18 (66.7%)habitat location
and selective fish habitat sites during June to September.
In the Talkeetna to Devil Canyon reach during June to September,juvenile coho
salmon were collected at 13 of 17 (76.5%)habitat locations.Age 0+coho
salmon,offspring of brood year 1980 were collected at 12 of the 17 (70.6%)
Talkeetna to Devil Canyon habitat locations while age I+,from brood year
1979,were observed at seven of the 17 (41.2%)site~.No juvenile coho salmon
from brood year 1978,age II+,were observed in Talkeetna to Devil Canyon
habitat location catches during the summer,1981.Age 0+coho salmon distri-
bution increases progressively from early June through the summer and is most
E-3-71
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Table E.3.2.8.Coho salmon juveniles,catch per unit effort at selected fish
habitat sites on the Susitna River between Cook Inlet and Devil Canyon
June to September,1981.
Catch per traK day
Aug.Selected Fish River June June July July ug.Sept.Sept.
Habitat Sites Mile 1-15 16-31 1-15 16-31 1-15 16-31 1-15 16-30
Fish Creek Mouth 7.0 0.0
Fish Creek
(Kroto Slough)31.4 0.0
Whitsol Lake Slough
Mouth (Kroto Slough)35.2 0.0
Mainstem Susitna Slough 72.3 0.0
Beaver Slough West
Bank 78.6 0.0
Side Channel West
Bank 79.2 0.0
West Bank Slough 79.8 0.0
Rabideux Creek 83.2 0.0
Slough Adjacent to
Gold Creek Camp 136.8 0.0
E-3-72
Table E.3.2.9.Coho salmon juveniles,catch per unit effort at habitat location
sites on the Susitna River between Cook Inlet and Talkeetna,
June to September,1981.
Catch per trap da*
River June June July July Aug.ug.Sept. Sept.
Habitat Location Mile 1-15 16-31 1-15 16-31 1-15 16-31 1-15 16-30
Alexander Creek 10.1
Site A (mouth)0.1 0.1 0.2 0.1 0.3 0.3
Site B (2.0 miles
upstream of mouth)0.0 0.4 0.2 1.5 0.3
Site C (4.0 miles
upstream of mouth)0.2 0.1 0.4 0.4 1.3 0.4
Anderson Creek 23.8 0.0 0.0 0.0 0.0 0.0 0.4 1.0 0.2
Kroto Slough (mouth)30.1 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0
Mainstem Slough 31.0 0.0 0.0 0.0 0.0 0.0 0.2
Mid Kroto Slough 36.3 0.0 0.0 0.1 0.0 0.0 0.0
Deshka River 40.6
Site A (mouth)0.0 0.4 0.2 0.1 0.3 0.2 0.0
Site B (1.0 miles
upstream of mouth)0.1 0.4 0.3 0.7 1.3 0.4 0.3
Site C (3.5 miles
upstream of mouth)0.5 0.2 1.4 1.7 1.0 0.3
Lower Delta Islands 44.0 0.0 0.0 0.0
0.0
Little Willow Creek 50.5 0.0 0.1 0.0 0.2 0.4 0.2 0.5
E-3-73
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I Table E.3.2.9.Coho salmon juveniles,catch per unit effort at habitat location
sites on the Susitna River between Cook Inlet and Talkeetna,
I June to September,1981.
I Catch ter trap day
River June June July Ju y Aug. Aug.Sept. Sept.
I Habitat Location Mile 1-15 16-31 1-15 16-31 1-15 16-31 1-15 16-30
Rustic Wilderness 58.1 0.0 0.0 0.0 0.0
I Kashwitna River 61.0 0.1 0.0 0.0 0.1 0.1 0.1
I
Caswell Creek 63.0 0.2 1.2 9.1 19.1 41.0 2.0
Slough West Bank 65.6 0.0 0.0 0.2
I Sheep Creek Slough 66.1 0.0 0.4 1.9 3.5 3.5
0.6
Goose Creek
I Site 1 72.0 0.2 0.4 0.3 0.1 2.1 0.1
Site 2 73.1 0.1 0.1 1.7 1.4
I
Mainstem West Bank 74.4 0.0 0.0 0.0 0.0 0.0 0.6
Montana Creek 77 .0 1.7 1.7 0.4 4.1 2.1 1.1 0.1
I Mainstem 1 84.0 0.2 0.0 0.2 0.0 0.0 0.0 0.0 0.0
Sunshine 85.7 3.6 0.0 1.4 1.8
2.8 1.5 2.6 0.2
I Birch Creek Slough 88.4 1.3 0.2 1.4 0.5 0.2 0.3 5.6 2.6
I Birch Creek 89.2 1.1 4.1 2.0 11.6 18.2 17.9 10.0
Cache Creek Slough 95.5 0.0 0.0 0.1 0.0 0.0 0.0 0.1 0.0
I Cache Creek 96.0 0.0 1.3 0.2 0.2 0.2 0.7 0.1 0.2
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extensive in early September when they were collected at 53.9 percent of the
habitat locations located from Talkeetna to Devil Canyon (Figure E.3.2.4).
The incidence of age 1+coho salmon in catches at habitat locations ranged
from 11.8 percent in late July and late September to 30.8 percent in early
September (Figure E.3.2.5).Occurrence of age 0+coho salmon was more con-
sistent at tributary mouth locations than at mainstem or slough locations
throughout the summer (Table E.3.2.10).Age 1+coho salmon appear in a lesser
percentage of both tributary mouth and mainstem-slough habitat location
catches during this same time.
Age 0+coho salmon were also observed in Indian River and Portage Creek at
selected fish habitat sites.Distribution was more extensive in Indian River
where 154 age 0+coho salmon were collected from Indian River miles 2.7,7.2
and 12.0 (Table E.3.2.11).Six age 0+coho salmon were observed in Portage
Creek at mile 4.5 only once during the season in October.
The highest age 0+coho salmon catch per unit effort,7.0 fish per trap,was
recorded at Whiskers Creek (RM 101.4)in late August (Table·E.3.2.12).
Comparatively high age 0+coho salmon catch rates were recorded at Whiskers
Creek mouth during each two week interval throughout the summer.Relatively
high catch rates for age 0+coho salmon were also recorded at Slough 6A (RM
112.3)and Fourth of July Creek (RM 131.1)during August and September and at
Indian River mile 12.0 in August (Appendix Table EB-2.2).
The highest age 1+coho salmon catch per unit effort,0.6 juvenile coho per
trap,was recorded at both Whiskers Creek (RM 101.4)during early July and at
Slough 6A (RM 112.3)during late August (Table E.3.2.13).Consistent catches
E-3-75
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- - - - - - - - -_.- - - - - - - - -
---l
SEPTEMBERAUGUSTJULYJUNE
0+COHO SALMON-
'.-i I
-
-
-
-
I
II I I I I I I I I
60
p
E
R
C
E liDN
T
I
N
rr1 I CI
W
I I 20I
'-J
0'\
0
E•I N
C
E
0
Figure E.3.2.4.Percent incidence of coho salmon (age 0+)captured at habitat location sites on the
Susitna River between Talkeetna and Devil Canyon,June to September,1981.
J
...
-w
Q;
II
-.I
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SEPTEMBERAUGUSTJULYJUNE
I p 4:0 l 1+COHO SALMON ''I
E
E 30
E
N
T
I 20
N
C
Io
E 10
N
C
E
l"I'1
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W
I
'-l
'-l
J
Figure E.3.2.5.Percent incidence of coho salmon (age 1+)captured at habitat location sites on the
Susitna River between Talkeetna and Devil Canyon,June to September,1981.
- ------------------
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Table E.3.2.10.Coho salmon juveniles,percent incidence at habitat location
sites on the mainstem Susitna River and its tributary mouths between
Talkeetna and Devil Canyon,
June to September,1981.
Percent Incidence
June June July July Aug Aug Sept Sept
1-15 16-30 1-15 16-31 1-15 16-31 1-15 16-30
Coho 0+
Tributary habitat sites 25.0 33.3 60.0 60.0 60.0 60.0 80.0 80.0
Mainstem habitat sites 0.0 10.0 25.0 33.0 50.0 41.7 37.5 33.3
Combined habitat sites 11.1 15.4 35.3 41.2 52.9 47.1 53.9 47.1
Coho 1+
Tributary habitat sites 25.0 33.3 40.0 40.0 40.0 20.0 20.0 0.0
Mainstem habitat sites 20.0 20.0 25.0 0.0 8.3 25.0 37.5 16.7
Combined habitat sites 22.2 23.1 29.4 11.8 17.7 23.5 30.8 11.8
All Coho Juvenile
Tributary habitat sites 25.0 33.3 60.0 60.0 60.0 60.0 80.0 80.0
Mainstem habitat sites 20.0 20.0 41.7 33.3 50.0 41.7 62.5 41.7
Combined habitat sites 22.2 23.1 66.7 41.2 52.9 47.1 69.2 52.9
E-3-78
Table E.3.2.11.Coho salmon (age 0+),catch per trap day at selected
fish habitat location sites on Indian River and Portage CReek,
June,August and October,1981.
INDIAN RIVER PORTAGE CREEK
Catch ier trap day Catch ier trap day
River Juneugust October River Juneugust October
Mile 1-15 16-31 1-15 Mile 1-15 16-31 1-15
2.7 0.0 0.4 0.4 4.5 0.0 0.0 0.6
7.2 0.0 2.4 0.3 9.2 0.0 0.0 0.0
12.0 4.0 2.7 15.5 0.0 0.0
13.5 0.0 15.6 0.0
E-3-79
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Table E.3.2.13.Coho salmon (age I+),catch per unit effort at habitat location IsitesontheSusitnaRiverbetweenTalkeetnaandDevilCanyon,
June to September,1981.I
ICatchpertrapday
River June June July July Aug. Aug.Sept.Sept.IHabitatLocationMile1-15 16-31 1-15 16-31 1-15 16-31 1-15 16-30
Whisker Creek Slough 101.2 0.2 0.2 0.0 0.0 0.0
0.1 0.1 0.1
IWhiskerCreekMouth101.4 0.4 0.5 0.6 0.2 0.3 0.1 0.1
0.0
Slough 6A 112.3 0.0 0.1 0.1 0.0 0.2 0.6 0.3 0.1 I
Lane Creek Mouth 113.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Mainstem 2 114.4 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 I
Susitna Curry 120.7 0.0 0.0 0.0 0.0
0.0 0.0
ISusitnaSideChannel121.6 0.0 0.0
0.0 0.0 0.0 0.0
Susitna Gravel Bar 123.8 0.0 0.1 0.0 0.0 0.0 0.0 I
Slough 8A 125.3 0.0 0.1 0.0 0.0 0.1 0.0
Fourth of July Creek 131.1 0.0 0.1
0.1 0.2 0.0 0.0 0.0 IMouth
Slough 10 133.8 0.0 0.0
0.0 0.0 0.0 0.0 0.0 I
Slough 11 135.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Susitna Gold Creek 136.9 0.0 0.0 0.0
0.0 0.0 0.0 0.0 I
Indian River Mouth 138.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ISlough20140.1 0.0 0.0
0.0 0.0 0.0 0.0 0.0
Susitna Island 146.9 0.0 0.0
0.0 0.0 0.0 0.0 0.0 I
Portage Creek Mouth 148.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0
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were recorded throughout the summer at Whi skers Creek and at Slough 6A
{Appendix Table EB-2.3}.
3.2.5.2 Age and Length Composition
Three age classes of juvenile coho salmon were collected at habitat locations
in the lower Susitna River from June to September,1981.These fish represent
brood years 1978,1979 and 1980.
During August and September,143 juvenile coho salmon from Cook Inlet to Devil
Canyon were aged using scale analysis and measured for total length in mil-
limeters {mm}to determine the range of length overlap and establish the
inflection point between ages by two week period.Figure E.3.2.6 illustrates
that by August and September there is overlap in the length ranges determined
for age 0+and age 1+coho salmon.Inflection points between ages were
established at 90 mm,95 mm and 100 mm for early August,late August and early
September respectively.No age II+coho salmon were present in the scale
analysis sample.
Two thousand four hundred twelve juvenile coho salmon were measured for total
length {mm}during June to September between Cook Inlet and Talkeetna.An
additional 1,030 juvenile coho salmon were measured in the Talkeetna to Devil
Canyon reach.
Three age classes of juvenile coho salmon were present in habitat location
catches made during early June between Cook Inlet and Talkeetna.Analysis of
length frequency composition by two week period indicates that age II+coho
E-3-82
~
n
Coho Age 1+
August 16-31,1981
N=26
Range 85-144 mm
,------.I \1 \ •.-.\ ,
8 18 -32 -48 64 80 96 112 128 ''''4 16B
LENGTH (mm)
8
Ie
2e
4B
SB
1--·-', 1 I 1 '·~-'--1---'~-I
B 18 32 48 84 8B 96 I 12 128 I 44 I 6B
6S
I II
Coho AQe 1+
August 1-15,1981
N=20
Range 92-157 mm
1 \ 1 \'---1--\--,I I I
8 ,e 32 48 e4 88 96 I 12 I 28 144 168
LENGTH (mm)
8
1 I·1 1 1 1 --r-···.---r--,---.
B 16 32 48 8..8B 98 I 12 128 144 16B
5B
48>-u
~3B
:Jo
lLl 28It
IL.
Xl8
SG1l S9
"-',--,
48 Coho Age 0+ole Coho Age 0+>-
U
~38 August 1-15,1981 3e August 16-31,1981
:J N=18 N=53
0 Range 74-103 mm 2e Range 70-103 mmlI.J 28ItIL.
x':j ~,
IS
8
1'T1
I
W
Ico
W
Figure E.3.2.6.Age-length frequency composition of juvenile coho salmon on the Susitna River
between Cook Inlet and Devil Canyon,August,1981.Age determined by scale
analysis.Lengths are total.
-------------------
I I •I "•I I Io1632486"1 80 96 1 12 128 144 160
LENGTH (rom)
E-3-84
Age-length frequency composition of juvenile coho
salmon on the Susitna River between Cook Inlet and
Devil Canyon,September 1 to 15,1981.Age determined
by scale analysis.Lengths are total.
n
Coho Age 0+
September 1-15,1981
N=14
Range-77-100 lIm
roho Age 1+
September 1-15,1981
~'1=12
Ran~e 90-141 RID
Fi gu re E.3.2.6.
(continued)
I I I I I I » » » »Jo163248648096112128144160
o
50
50
-0
>-40
U
Z
,·WS0
::>o
~20
lJ..
~to·
>-40
U
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WS0:>
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W 20~
l1..
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salmon were no longer present in the Cook Inlet to Talkeetna reach after June
15 (Figure E.3.2.7).Age 0+and age I+coho salmon were present throughout
the summer.The range of lengths for age 0+and age I+can be approximated
from the length frequency data.However~it is impossible to determine the
amount of overlap or accurately establish an inflection point between these
ages of coho salmon in the Cook Inlet to Talkeetna reach from length frequency
alone.
Two age classes of juvenile coho sa1mon~age 0+and age I+~were present in
habitat location catches made throughout June to September between Talkeetna
and Devil Canyon.Analysis of the length frequency composition illustrated by
two week period in Figure E.3.2.8 indicates that a length distinction between
age 0+and age I+can be determi ned for 1ate June to September in the Ta 1-
keetna to Devil Canyon reach.Age I+coho salmon in this reach appear to be
greater than 75 mm total length by late June.This value increased five mm in
length each two weeks through late September when age 1+were determined to be
105 mm and greater.
The average length of age 0+coho salmon collected between Talkeetna and Devil
Canyon ranged from 55.6 mm in late June to 64.1 mm in late August (Table
E.3.2.14).The average length of age I+coho salmon ranged from 89.0 mm in
late July to 126.4 mm in early September.
Juvenile coho salmon collected from Cook Inlet to Talkeetna ranged from 31 mm
to 172 mm during June to September (Table E.3.2.15).
E-3-85
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-'-- - - - - - - - - - - - - - ---
":
r 1 1 1 I I I 1 1 I 1oI6365472901061'26 I....162 I ee1 1 I 1 1 1 1 1 r 1 1
El I 8 36 S"72 90 108 I 26 I H I 62 I 80
..~58
>-..a June 1-15 4.~July 1-15
N =114 N =212u
~sa-l sa
::>
0
LLI 2a-l 280::u..
~I:J --Ie
,......-.,,....~.....,.......a
rrJ sa .,5aIw
Iex>'.j June 16-30 ..e,July 16-31en
~S0
N 1:1 147 N 1:1 353
se
::>
0
LLI 20-1 2e0::u..
~':J FLr~~Ie
e------.,-
,----,---.---.---1---'----,--r-r-,-~-,
e 18 36 54 72 9El IEl8 126 144 162 IBEl
LENGTH (mm)
r ,1 ,I-1 , I 1 , ,
El 18 S6 S4 72 913 I eB 128 I....162 I Be
LENGTH Cmm)
Figure E.3.2.7.Length frequency composition of juvenile coho salmon at habitat location sites
\Ion the Susitna River between Cook Inlet and Talkeetna t June to September t 1981.
Lengths are total.
..
I I , I I I , I I , ,
8 18 38 54 72 S8 188 128 I H 162 100
r--.---,~~,---,-~,--,---,--,---r-----.
B I 8 38 6..72 99 I 98 I 26 1H I 82 180
S9l S9
4e~>-49 1 August 1-15 September 1-15
N •421 N =339u
~sa~.sa
:>
0
1IJ 29 ~290::La.K]/"~-Ie
a
,.....-'i--,__
September 16-30
. N •247
.-,I I I I I , I I ,o 18 36 54 72 90 108 126 14<4 162 I Be
LENGTH emm)
Ie
9
2a
sa
..e
S9
August 16-31
N •579
,---,---r----I ---I -~'----T-----'I I I
a 18 36,64 72 ga 108 126 I""162 '80
LENGTH Cmm:>I
59
a
>-..9
U
ZW S9:>o
1IJ 2a0::
La.
~19
I'T1
I
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I
(X)......
Figure E.3.2.7.
(continued)
Length frequency composition of juvenile coho salmon at habitat location sites on
the Susitna River between Cook Inlet and Devil Canyon,June to September,1981.
Lengths are total.
-------------- -----
- - - -_.-- - --_.-- - -_.-- -
sa
>--4a
u
~sa
:Ja
ILl 2a·
~
IL
~la
a
60
IT1
40
I
W
>-I
U00
~sa
00
:J
0
ILl 2'1~
IL
~~10
a
June 1-15
N =19
n'fL,nn
I I I 1_________.~~1____.____._________.I I
a t 8 38 S-4 72 Da 108 t 28 I ....162 18a
June 16-30
Aoe 0+less than 75 mm
AQe 1+75 mm and ~reater
N°·65 .
~rul
I I I I----.~_____._________.I I Ia1836S47290108126I44162180
LENGTH (mrn)
S9
40
Sa
20
IQ
a
60
40
sa
29
10
e
July l-15
Ace 0 less than 80 mm
.Ape 1+80 Il111 and ~reater
N =100
,.,
I I I I I I I .----~1~____.~--~1
o 18 38 54 72 ge 108 128 t ..'"162 I 80
July 16-31
Ane 0+less than 85 mm
Ape ,+85 mm and nreater
N =79
I I I I I I I I I '-1e18365047290108126I""182 IBO
LENGTH (mm)
Figure E.3.2.8.ILengthfrequencycompositionofjuvenilecohosalmonathabitat location sites
on the Susitna River between Talkeetna and Devil Canyon,June to September,1981.
Lengths are total.
,..--,
__n,.,
,....,r--"'1
September '16 ..30
Aoe 0+less than 105 mm
Ape 1+105 mm and areater
N =109
September 1..15'
Aoe 0+less than 100 mm
Ace 1+100 mm and preater
N =213
1--1--T 1 1 1 I 1 I I 1
8 .18 38 5..72 90 108 128 I ....162 188
LENGTH Cmm)
I 1 I I I 1 I '--'--'--1
o I 8 S8 5..72 9fj ,1218 128 1....182 I 80
e
8
18
2a
"'121
sa
58
1121
2121
S8
58
..8
...
,.-----.....
August 16 ..31
Age 0+less than 95 mm
Age 1+95 mm and greater
N =268
AUClus~1..15
Age 0 less than 90 mm
Age 1+90 mm and preater
N =177
-
...
r-~--'----'---I----I~.---1 1 1 1 1
8 18 38 5..72 98 la8 128 I,....182 188
LENGTH (mm)
I 1 1 1 1 .-----,1 I , ,
a 18 38 5..72 9a 108 128 I ....182 18a
sa
..a>-u
~sa
:J
0
liJ 2a0:
IJ..
~1a
a
sa
ITl
..aI
>-W
U
Ico
~sa
.\.0
:J
0
W 2a0:lL.
~la
a
Figure E.3.2.8.
(continued)
Length frequency of juvenile coho salmon at habitat location sites on the Susitna
River between Talkeetna and Devil Canyon,June to September,1981.Lengths are
total.
-----_.-- - -
-------- -
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Table E.3.2.14.Coho salmon (age 0+and 1+),length analysis at habitat
location sites between Talkeetna and Devil Canyon,
June to September,1981.
Age 0+Coho Salmon Age 1+Coho Salmon
Total No.Mean Range of Total No.Mean Range of
of fish Length Length of fish Length Length
Date Sampled (mm)(mm)Sampled (mm)(mm)
6/16-30 51 55.59 38-70 14 97.57 80-119
7/1-15 86 56.22 40-78 14 92.00 80-120
7/16-31 76 53.54 42-82 3 89.0 87-90
8/1-15 167 59.67 30-89 10 102.60 90-143
8/16-31 256 64.10 35-94 12 116.33 95-138
9/1-15 206 62.05 .47 -95 7 126.43 108-140
9/16-30 102 62.55 46-94 7 125.0 105-150
•
E-3-90
Table E.3.2.15.Coho salmon juveniles,length analysis at habitat location sites on the Susitna River
between Cook Inlet and Talkeetna,Talkeetna and Devil Canyon and also at selected fish habitat
sites on Indian River and Portage Creek,June to October,1981.
Indian River Susl1,,-ilR-i ver
and Cook Inlet Talkeetna
Portage Creek to Talkeetna to Devil Canyon Combined Total
No.Mean Range of No.Mean Range of No.Mean Range of No.Mean Rang-e--of
of Length Length of Length Length of Length Length of Length Length
Date Fish .(mm)(mm)Fish (mm)(mm)Fish (mm)(mm)Fish (mm)(mm)
6/1-15 0.0 114 100.03 31-172 19 75.21 48-127 133 96.48 31-172
6/16-30 0.0 147 72.34 38-125 65 64.63 39-119 212 69.98 38-125
rn
I 7/1-15 0.0 212 75.36 34-135 100 61.23 40-120 312 70.83 34-135w
I
1.0
I-'7/16-31 1 68.00 353 78.87 43-161 79 54.89 42-90 432 74.49 42-161
8/1-15 18 57.56 50-67 421 78.43 44-155 177 62.00 30-143 598 73.59 30-155
8/16-31 62 55.45 32-76 579 76.86 45-152 268 66.44 35-138 847 73.56 35-152
9/1-15 24 67.83 54-80 339 86.01 54-150 213 64.17 47-140 552 77 .58 47-150
9/16-30 1 54.0 247 73.91 48-156 109 66.56 46-150 356 71.66 46-156
10/1-15 25 63.68 52-85
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One hundred and thirty one juvenile coho salmon captured at habitat location
and selected fish habitat sites in Indian River (RM 138.6)and Portage Creek
(RM 148.8)during June to October were exclusively age 0+.Figure E.3.2.9
illustrates the length frequency composition for Indian River and Portage
Creek.Mean lengths of juvenile coho salmon were not compared by two week
period due to the insufficient number of fish captured.
Extensive minnow trapping for juvenile coho salmon in the Susitna River
drainage was conducted in previous years by ADF&G staff at two of the 39
habitat locations sampled by Su Hydro staff in 1980-81.The two habitat
locations sampled were Montana Creek mouth (R.M.77.0)by Riis and Friese in
1977-78 and Deshka River mouth (R.M.40.6)by Delaney et al.in 1980.
Sampling conducted on Montana Creek from Parks Highway to the mouth during
1ate August 1977 to February 1978 recorded a maximum catch rate of 1.9
juvenile coho salmon per trap during early October,then decreasing to 0.1
juvenile per trap.Sampling conducted by Su Hydro staff from the railroad
bridge to the mouth of Montana Creek during November,1980 to September,1981
recorded a catch rate of 0.4 juvenile coho salmon per trap in November and
reached a maximum during early August of 4.1 juveniles per trap.The Deshka
River juvenile chinook and coho study from May to October 1980 was conducted
at eight individual sections of the river ranging from the mouth (R.M.0.0)to
the river interception of the Petersville road.Two sections of the river
established in the 1980 study,VI and V,:encompasses three habitat location
E-3-92
~
1--,--I I -----.~-I~-._T I I IaIe38S4729BIae128IH182I8a
I I I I I I ,-----.I I I
a 18 36 54 72 9a la8 128 ~....182 18a
lee~sa
>ea June 1-15 4e~July 1-15
N =0 N =0u
~ea-l 3a
:J
0
W 4a-l 2a~
I.L.
~2:J la
a
sa.,laa
I'T1
I
W
I ti 4ej J,une 16-30 sal 1\July 16-311,0w N =0 N =1
~3a .8a
:J
0
w 28-1 4a~
I.L.
~]2a
B
.-_.-----m_l~-,---I---T--T-----.-.I I
8 18 38 54 72 9a I a8 128 I....162 18a
LENGTH Cmm)
'----I I I I I I I I I I
o Ie 38 5""72 9B 108 128 144 162 18a
LENGTH Cmm)
Figure E~3.2.9.I
length frequency composition of juvenile coho salmon at habitat location sites
and selected fish habitats on Indian River and Portage Creek,June to early
October,1981.lengths are total..
-------------------
September 1-15
N =24
I I I I I I I I ------.----.--1
B 18 36 64 72 90 I B8 .128 144 182 t BO
ID
a
28
40
sa
68
August 1-15
N =18
I I I I I I I I I I I Io,8 36 64 72 90 108 126 I 44 ,62 180
68
o
>-40
U
ZW S8
:::>o
~20
l£.
~10
I I I I I I I I '----.--1
a 18 36 S4 72 gO 108126144162 lE'a
LENGTH Cmm)
'-----r-,,-.-~--.-I~_.~_.~~
o 18 38 S04 72 gO 108 128 144 '82 180
LENGTH em"!:>
S8j 60
rt1
I
W
'OJ August 16-31 ""I September 16-30.October 2.3I
~~sa
N II 62 N =26~
sa
:::>
0
w 28-1 II 20a::
l£.
~]nl ~10
a
Figure E.3.2.9.
(continued)
Length frequency composition of juvenile coho salmon at habitat location sites
and selected fish habitat sites on Indian River and Portage Creek,June to early
October,1981.Lengths are total.
sites (A,B and C)which were sampled by Su Hydro staff during 1981.Section
VI (R.M.0.0 to R.M.1.5),encompasses habitat location sites A (R.M.0.0)and
B (R.M.1.0),and section V (R.M.1.5 to R.M.4.0)site C (R.M.3.5).
Catch rates during 1980 from May to October at Section V in the Deshka River
recorded two peaks,reaching a maximum catch rate of 2.0 juvenile coho salmon
per trap during early June and peaking again in early August at 1.8 juveniles
per trap;catch rates then decreased to 0.0 juveniles per trap in October.
Catch rates.during.1981 from 1ate June to 1ate September at the same area
(habitat location site C)recorded a maximum catch rate of 1.7 juvenile coho
salmon per trap in late August,then decreasing to 0.3 juveniles per trap in
late September.
Catch rates at Section VI in 1980 recorded a maximum of 1.3 juvenile coho
salmon per trap in early August and decreasing to 0.0 in October.Sampling
conducted in 1981 at the same area (habitat location sites (A and B)recorded
a maximum catch rate of 0.7 juveniles per trap.
InveAtory sampling was also conducted by Riis and Friese from July 1 to
October 5,1977 on the Susitna River between Talkeetna and Devil Canyon.
Juvenile coho salmon were captured in 12 sloughs and at two tributary creek
mouths.
E-3-95
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3.3 OTHER JUVENILE SALMON
3.3.1 Abstract
Beach seines,minnow traps,shovels and dipnets were utilized to capture
approximately 1,750 juvenile pink salmon,Oncorhynchus gorbuscha;chum salmon,
O.keta;and sockeye salmon,O.nerka during 1981 studies of the Susitna----..~
River.Chum salmon were captured at Alexander {R.M.10.1}and Slough 11 {R.M.
135.3}.Juvenile pink salmon were observed from Mainstem Slough {R.M.31.0}
upstream to Indian River {R.M.138.6}.Sockeye fry were captured at Alexander
Creek,Birch Creek {R.M.89.2},Cache Creek Slough {R.M.95.5}and Cache Creek
{R•M•96.0}.
Distribution,abundance,and time of emergence of juvenile chum,pink,and
sockeye salmon could'not be determined strictly from the capture techniques
utilized during this study.A downstream migrant trap and extensive surveys
of slough and mainstem spawning sites are necessary to provide qualitative
estimate of spawning success,overwinter survival of eggs,and timing of
emergence and outmigration for those species.
3.3.2 Introduction
Five species of Pacific salmon inhabit the Susitna River.Sampling conducted
from November,1980 to October,1981 in the Susitna River between Cook Inlet
and Devil Canyon produced catches of juveniles of all five species.Included
E-3-96
in these catches were the following three species:pink salmon,Oncorhynchus
gorbuscha;chum salmon,Oncorhynchus keta;and sockeye salmon,Oncorhynchus
nerka.
3.3.3 Methods
Minnow traps,beach seines,shovels and dipnets were used to collect samples
of juvenile and pre-emergent salmon.
3.3.4 Results and Discussion
3.3.4.1 Distribution and Relative Abundance
Approximately 1,700 chum,20 pink,and 35 sockeye fry were captured from
November,1980 to October,1981.
Beach seining at Slough 11 (Gold Creek area)June 19,accounted for 1,650 chum
fry,while 13 chum fry were captured by beach seine in Slough 20 during this
time.Chum fry were also captured in Alexander Creek in July.
Pink fry were collected at Mainstem Slough (Yentna),Slough 8A,Fourth of July
Creek,and Slough 10 in June and July.Sockeye fry were collected at
Alexander Creek,Birch Creek and Cache Creek in September (Table E.4.3.1).
Winter sampl ing in March and Apri 1 produced 25 sockeye fry at Slough 11,one
at Slough 9,and one below Talkeetna.During March,shovels and beach seines
were used to collect pre-emergents in the Gold Creek area where approximately
E-3-97
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-------------------Table E.3.3.1.Pink,chum and sockeye salmon juvenile catches in the Susitna River between
Cook Inlet and Devil Canyon,November,1980 to October,1981.
River
Mile Date Gear Pink Chum Sockeye
Mainstem Susitna 97.5 March Minnow Trap 1
Slough 9 Upper Reach 129.1 March Minnow Trap 1
Indian River {R.M.138.6}1.0 April Minnow Trap 3
5.0-7.0 March Minnow Trap 1
5.0-7.0 April Minnow Trap 1
Slough 11 135.3 April Beach Seine 2 25
Slough 11 135.3 6/19/81 Beach Seine 1,650
Slough 20 140.1 6/19/81 Beach Seine 13
Alexander Creek 10.1 7/1/81 Beach Seine 14 5
Alexander Creek 10.1 7/2/81 Beach Seine 11
Slough 11 135.3 7/4/81 Beach Seine 13
Slough 11 135.3 7/6/81 Minnow Trap -6
Slough 8A 125.3 7/23/81 Minnow Trap 3
fT1 4th of July Creek 131.1 6/16/81 Beach Seine 4IwSlough10133.8 6/17/81 Beach Seine 3I
\0 Indian River {Mouth}138.6 6/9/81 Minnow Trap 1co
Mainstem Slough 31.0 7/5/81 Beach Seine 1
Birch Creek 89.2 9/14/81 Minnow Trap 3
Cache Creek 96.0 9/10/81 Minnow Trap 2
Cache Creek Slough 95.5 9/10/81 Minnow Trap 1
TOTALS March -9/14 Minnow Trap/17 1,709 35
Beach Seine
2,000 pink,chum and sockeye sac fry were observed in Slough 11 and in Indian
River.An incidence of dead pink salmon pre-emergents were observed in two
redds uncovered.Surveys conducted April 11 showed yolk sac absorbtion to be
95 to 100 percent complete for chum fry and 50 percent for pink salmon fry.
The first emergents observed were captured March 23 in both Slough 11 and
Indian River.The majority of the first emerging fry observed were pink
salmon.
Although juvenile chum,pink,and sockeye salmon were captured duri.ng this
study,the techniques utilized were unable to collect the qualitative data
necessary to determine the early life histories of the species in the Susitna
River.Following emergence,chum and pink salmon fry remain in the river only
a short period before undergoing their seaward migration.Beach seines are
effective in capturing these species only if hydraulic conditions exist such
as smooth substrate and minimum debris.Few such areas occur in the Talkeetna
to Devil Canyon reach at which mainstem and slough spawning occurs.Minnow
traps have proven ineffective for the capture of these species.Sockeye
salmon juveniles are in the Susitna River in catchable concentrations only
during their downstream migration to the ocean and present methods were unable
to collect adequate numbers of this species.Intensive examination of main-
stem spawning sites are necessary to deter.mine spawning success,overwinter
survival of eggs and alevins,and timing of emergence for juvenile chum,pink,
and sockeye salmon.Timing of outmigration can be adequately assessed from
data collected from downstream migrant traps and a comparison to information
collected at mainstem and slough spawning sites.
E-3-99
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3.3.4.2 Age,Length and Sex Composition
Lengths,ranges and their means are given in Table E.3.3.2.
E-3-100
Table E.3.3.2.Pink,chum and sockeye juvenile length compostion in the Susitna River between
Cook Inlet and Devil Canyon,November,1980 to September,1981.
Cook Inlet to
Talkeetna Sample Size Range Mean.(mm)
Pink 15 30-42 33
Chum 45 26-48 33
Sockeye 4 53-55 54
Talkeetna to
Devil Canyon Sample Size Range Mean
IT1 (mm)
I
(.oJ
I Pink 1 37 37.....
0.....Chum 25 37-56 50
Sockeye 5 50-80 60
-------------------
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4.LITERATURE CITED
Adult Anadromous Investigations.1981.Alaska Department of Fish and Game.
Susitna Hydroelectric Aquatic'Studies.Phase I Final Draft Report.
Subtask 7.10.
Aro,K.V.,and M.P.Shepard.1967.Salmon of the North Pacific Ocean -Part
IV.Spawning populations of North Pacific Salmon.5.Pacific salmon in
Canada.Bull.Int.N.Pac.Fish.Comm.23:225-327.
Barrett,B.M.1974.An assessment study of the anadromous fish populations
in the upper Susitna River watershed between Devil Canyon and the
Chul itna River.Cook Inlet Data Report No.74-2.Alaska Department of
Fish and Game.Div.of Comm.Fish.56 pp.
Davidson,F.A.,and S.J.Hutchinson.1938.The geographical distribution and
environmental limits of the Pacific salmon (genus Oncorhynchus).Bull.
U.S.Bur.Fish.48(26}:667-692.
Delaney,K.J.,K.Hepler,and K.Roth.1981.Deshka River chinook and coho
salmon study.Alaska Department of ,Fish and Game.Fed.Aid in Fish
Restor.,Project AFS-49,Volume 22.
Delaney,K.J.,and R.Wadman.1979.Little Susitna River juvenile chinook
and coho salmon study.Alaska Department of Fish and Game.Division of
Sport Fish.41 pp.
E-4-1
Elliot,S.T.1976.A study of land use activities and their relationship to
the sport fish resources in Alaska.Alaska Department of Fish and Game.
Federal Aid in Fish Restoration,Annual Report of Progress,1975-1976.
Project F-9-8,Job No.D-I-B,i7:1-21 pp.
Friese,N.V.1975.Preauthorization assessment of anadromous fish populations
of the upper Susitna River watershed in the vi cinity of the proposed
Devil Canyon hydroelectric project.Cook Inlet Data Report No.75-2.
Alaska Department of Fish and Game.Div.of Comm.Fish.121 pp.
Geiger,M.F.and F.W.Anderson.1975.Annual Management Report 1975 Yukon
River.Alaska Department of Fish and Game.Div.of Commercial Fisheries.
65 pp.
Gray,P.,Florey,K.,Koerner,J.,Marriott,R.,1978.Coho salmon,
Oncorhynchus kisutch.Fluorescent pigment mark-recovery program for.the
Taku,Berners and Chilkat rivers in southeastern Alaska (1972-1974).
Alaska Department of Fish and Game.Informational leaflet No.176,77
pp.
Kubi k,S.,and R.D.Wadman.1978.Inventory and cata1ogi ng of sport fi sh
waters of the lower Susitna River and central Cook Inlet drainages.
Alaska Department of Fish and Game.Fed.Aid in Fish Restor.,Annual
Report of Progress,1978-1979,Project F-9-11,20(G-I-H).21 pp.
E-4-2
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E-4-3
Roos,J.F.1960.Predation of young coho salmon on young sockeye salmon fry
at Chignik,Alaska.Trans.Amer.Fish.Soc.89(4):377-379.
Meehan,W.R.,and D.B.Siniff.1962.A study of the downstream migrations of
anadromous fishes in the Taku River,Alaska.Trans.Amer.Fish.Soc.
91(4):399-407.
Noble,R.E.1959.Downstream migration of silver salmon,timing-age-size,
jack silvers-growth or inheritance.Proc.N.W.Fish Cult.Conf.
(1958):48-51.
1941.The consumption of young sockeye salmon by predaceous
J.Fish.Res.Bd.Canada 5(3):293-313.
Pearse,G.A.1974.A study of typical spring fed streams of interior Alaska.
Alaska Department of Fish and Game.Annual Performance Report.Project
F-9-6,Job G-III-G.15:1-29.
Riis,J.C.and N.V.Friese.1978.Preliminary environmental assessment of
hydroelectric development on the Susitna River.Alaska Department of
Fish and Game.Div.of Sport Fish and Comm.Fish.116 pp.
Ricker,W.E.
fishes.
McConnell,R.J.,and G.R.Snyder.1972.Key to field identification of
anadromous juvenile salmonids in the Pacific Northwest.National Oceanic
and Atmospheric Administration Technical Report Nat.Mar.Fish.Ser.
CIRC-366.6 pp.
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·1
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Scott,W.B.,and LJ.Crossman.1973.Freshwater fishes of Canada.Bull.
Fish.Res.Bd.Canada 184.Ottawa.966 pp.
Wallis,J.1968.Recommended time,size,and age for release of hatchery
reared salmon and steelhead trout.Fish Comm.of Oregon Research Div.
Clackamas,Oregon.61 pp.
Watsjold,DA.A 1977.Inventory,cataloging and population sampling of the
sport fish and sport fish waters in the upper Cook Inlet.Alaska
Department of Fish and Game.Fed.Aid Fish Restor.Annual Report of
Progress,1976-1977.Project F-9-9,vol.18,No.G-I-D.48 pp.
Watsjold,D.A.,Engel,L.1978.New Capital City environmental assessment
program -Phase 1.Source Document 2.Fish and Wildlife Studies.
Alaska Dept.of Fish and Game,U.S.Soil Cons.Ser.,122 pp.
E-4-4
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5.ACKNOWLEDGEMENTS
This study was funded by the State of Alaska,Alaska Power Authority.It was
conducted by the following Alaska Department of Fish and Game staff
biologists:
Kevin Delaney,Project Leader
Resident and Juvenile Anadromous Fisheries Studies
Drew Crawford
Larry Dugan
Stephen Hale
Karl Kuntz
Bob Marshall
James Mauney
James Quinn
Kent Roth
Paul Suchanek
Richard Sundet
~1i ke Stratton
E-5-1
- - - - - - - - - - - - - - - -......-Appendix Table EA Sampling effort by habitat location,sampling period,and gear type
on the lower Susitna River,1980-1981.
..
Appendix Table EA Sampling effort by habitat location,sampling period,and gear type
on the lower Susitna River,1980-1981.
MINNOW TRP TROT LINE GILL NET HOOlC&LINE BEACH SN ELECTRO GILL DRFT.DIP NET
SAMPLE (CTCH/TRP).(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/DU)(CT(:~)
7
Alexander Creek Site C,R.M.10.1,T.R.M.4.0,S/16N/07W/30/ACD
L JUN x x 0 0 0 0 0 .:0 ..
E JUL x x 0 0 x 0 0 ·0·
L JUL
••0
x x 0 0 0 0 0 0
E AUG x x 0 0 0 0 0 ,·x·
L AUG x x 0 0 0 0 0 :'X
E SEP x x x 0 x 0 0 :0
Anderson Creek,R.M.23.8,S/17N/07W/29/DDD
,
E JUN x x x 0 0 0 0 ·o;oQ 0
L JUN x x x 0 0 0 0 '0.
E JUL x x x 0 0 0 0 0
L JUL x x 0 0 0 0 0 ..: 0
E AUG x x 0 0 0 0 0 ·0
L AUG x x x 0 0 0 0 ~.
E SEP x x x 0 0 0 0 o.
L SEP x x x 0 0 0 0 .'0
:
"'.
Values -x indicate that this gear type was utilized during the sampling period
o indicate that this gear type was not utilized during the sampling period
-__--.--.IIiIIi'__
---------------_._--Appendix Table EA Sampling ef!ort by habitat location,sampling period,and gear type
on the lower Susitna River,1980-1981.
:
SAMPLE
MINNOW TRP TROT LINE
(CTCH/TRP)(CTCH/LHE)
GILL HET
(CTCH/24H)
HOOK&LINE
(eTCH/HR)
BEACH SN
(CTCH/THE)
ELECTRO
(CTCH/HR)
GILL DRFT'.DIP'~ET'
(eTCH/DRF)(CTCH)
Kroto Slough Mouth,R.M.30.1,T.R.M.2.0,S/17N/07W/Ol/DBC
EJUN x x x 0 0 0
L JUN x x 0 0 0 0
E JUL x x x 0 0 0
L JUL x x x 0 0 0
E AUG x x 0 0 0 0
L AUG x x 0 0 0 0
E SEP x x x 0 0 0
L SEP x x 0 0 0 0
Mainstem Slough,R.M.31.0,S/17N/06W/05/CAB
.E JUN x 0 0 0 0 0
L JUN x x x 0 0 0
E JUL x x x 0 0 0
L JUL x x 0 0 0 0
E AUG x x 0 0 0 0
E SEP x x 0 0 0 0
Values - x indicate that this gear type was utilized during the sampling period
o indicate that this gear type was not utilized during the sampling period
o
o
o
o
o
o
o
o
o
o
o
o
x
o
•
..;:
··...0
'.:.0"
",0.',,0
-...:0
·0 .
'9
.:0
.0.
'0
-:b
'0
'0
.0
,
Appendix Table EA Sampling effort by habitat location,sampling period,and gear type
on the lower Susitna River,1980-1981.
MINNOW TRP TROT LINE GILL NET HOOK&LlNE BEACH SN ELECTRO GILL DRFT .DIP NET
SAMPLE (CTCH/TRP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/DRF).(C['CH)
.!.....
Mid-Kroto Slough,R.M.36.3,S/18N/06W/16/BBC
E JUL x ..x x 0 x 0 0 .,0
L JUL x x 0 0 0 0 0 "0.
E AUG x x 0 0 0 0 x :'.0".
L AUG x x x 0 x 0 0 ,~E SEP x x 0 0 x 0 0 '.0,-..
L SEP x x x 0 0 0 0 ·...0
1
..
Deshka River Site A,R.M.40.6,T.R.M.0.0,S/19N/06W/35/BDA ::'.
..I.
MAR x x x 0 0 0 0 o'
MAY 0 0 x 0 0 0 0 :0
L JUN x x 0 0 0 0 0 o.
E JUL x x 0 0 0 0 0 ,'0·
L JUL x x 0 0 0 0 0 .,0.
E AUG x x 0 0 0 0 0 '."·0
L AUG x x 0 0 0 0 0 ,0'
E SEP ..
.::.0xx00000
L SEP x x x 0 0 0 0 0.....
,-..
Values -x indicate that this gear type was utilized during the sampling period
o indicate that this gear type was not utilized during the sampling period
,"..
'.
-----
- - - - - - - - - - - - - - - -_._.-'.
Appendix Table EA Sampling effort by habitat location,sampling period,and gear type
on the lower Susitna River,1980-1981.
.'.
SAMPLE
MINNOW TRP TROT LINE
(CTCH/TRP)(CTCH/LNE)
GILL NET
(CTCH/24H)
HOOK&LINE
(CTCH/HR)
BEACH SN
(CTCH/THE)
ELECTRO
(CTCH/HR)
GILL DRFT
(CTCH/DRF)
....
DIl?!{E,T'
(CTCH).
.\,-...
".
Deshka River Site B,R.M.40.6,T.R.M.1.0,S/19N/06W/26/BCB
MAR x x :x 0 0 0
MAY x 0 :x 0 0 0
L JUN x x 0 0 0 0
E JUL x x 0 0 0 0
L JUL x x 0 0 0 0
E AUG x x 0 0 0 0
L AUG x x 0 0 0 0
E SEP x x 0 :x 0 0
L SEP x x :x 0 0 0
Deshka River Site C,R.M.40.6,T.R.M.3.5,S/19N/06W/14/BCA
'0
o
o
o
o
x
o
o
o
.'
.'
:'.0
....~
.0
·'0 .'.'0'.
,....~..'
:..0':.
.0
0'
MAR
MAY
1:0 .JU1.a
L JUL
E AUG
L AUG
E SEP
L SEP
x x
o 0
-x-----------x-
x x
x x
:x x
x x
x x
o 0
x 0
--(T---------u-------
o 0
o 0
o 0
o 0
:x 0
o 0
o 0
-----0------------0----
o 0
o 0
o 0
o 0
o 0
o ,0.o 0
'l)-----..----'--0-:'-
o ..0
x ','0'
o ·0
o b
o ,"0
Values -x indicate that this gear type was utilized during the sampling period
o indicate that this gear type was not utilized during the sampling period
Appendix Table EA Sampling effort by habitat location,sampling period,and gear type
on the lower Susitna River,1980-1981.
..
SAMPLE
MINNOW TRP TROT LINE
(CTCH/TRP)(CTCH/LNE)
GILL NET
(CTCH/24H)
HOOIC&LINE
(CTCH/HR)
BEACH SN
(CTCH/TO)
ELECTRO
(CTCH/HR)
GILL DRFT
(CTCH/DRF)'
"
.DIP,'NET
(C'I;~H),
.','.
Lower Delta Island,R.M.44.0,S/19N/05W/19/ACB
L JUN x x x 0
E JUL x x x 0
L JUL x x 0 0
E AUG x x 0 0
Little Willow Creek,R.M.50.5,S/20N/05W/27/AAD
MAR x x x 0
L JUN x x 0 x
EJUL x x 0 x
L JUL x x 0 0
E AUG x x 0 0
L AUG x x 0 0
E SEP x x 0 0
L SEP x x 0 0
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
•
o
o
o
x
o
o
o
o
x
x
o
o
"0
"0 '
:'.0.-
','0 '
',0
;,~9'
·...0·
::0,.
o
,o·
,0'
'!:Q',
~".,
Values - x indicate that this gear type was utilized during the sampling period ,-
o indicate that this gear type was not utilized during the sampling period
, ,
,"
....
,"
;."
"
--------
- - - - - - - - - - - - - --_.•'--,
"
Appendix Table EA Sampling effort by habitat location.sampling period.and gear type ,.
on the lower Susitna River.1980-1981.
:..:
SAMPLE
MINNOW TRP TROT LINE
(CTCH/TRP)(CTCH/LNE)
GILL NET
(CTCH/24B)
BOOlC&LINE
(CTCH/HR)
BEACH SN
(CTCH/THE)
ELECTRO
(CTCH/HR)
GILL DUT
(CTCH/DRr),
DIp·NET
(c~cin
0 0 0 ,.,
0 0 0'
0 0 0
0 0 0
()0 0
0 0 0
0 0 .0
0 0 0
Rustic Wilderness.R.M.58.1.S/21N/05W/25/CBD
NOV x 0 0 0
JAN x x 0 0
MAR x x x 0
MAY x x x 0
L JUN x x 0 0
L JUL x x x 0
E AUG x x x 0
L AUG x x x 0
lCashwitna River.R.M.61.0.S/21N/05W/13/AAA
NOV x 0 0 0
DEC x x 0 0
MAY 0 0 0 0
L JUN x x 0 0
E JUL x x 0 0
L JUL x x x 0
E AUG x x 0 0
L AUG x x 0 0
L SEP x x x 0
E OCT 0 0 0 0
o
o
o
o
o
x
o
o
o
o
o
o
o
o
o
o
o
o
x
x
o
o
x
o
o
x
o
o
o
o
.,,
" '
,.
<~
."0
',0
'0
.'0'
0,
,·0'
:~o',
,,'
..'"
:',0.',
~.
.:0'·
o
',0
,0
·,~O
:0·
'Q
,~,
Values - x indicate that this gear type was utilized during the sampling period
o indicate that this gear type was not utilized during the sampling period :.
Appendix Table EA Sampling effort by habitat location,sampling period.and gear type
on the lower Susitna River,1980-1981.
:
"
Caswell Creek.R.M.63.0.S/21N/04W/06/BDD
NOV x 0 0 0
MAY x 0 x x
L JUN x x 0 0
I JUL x x 0 0
L JUL x x x 0
E AUG x x 0 0
L AUG x x 0 0
L SIP x x x 0
E OCT 0 0 0 0
~lough West Bank.R.M.65.6.S/22N/05W/27/ADC
E AUG x x x 0
L AUG x x 0 0
L SEP x x x 0
BIACH SN ELECTRO GILL DRFT •.DIP,'NET
(CTCH/THE)(CTCH/HR)(CTCH/DRF).:.(CTCH)"
....~...
.."',
0 0 0 ':.':0..,
0 0 0 ..o.
,,,':..
0 0 0 .,,:0"
0 0 0 .'."",0....'..
0 0 0 .;.0,
0 0 0 '.:'9,'
0 0 0 .',~o
0 0 0 'b·'
0°.f
0 X 0 ',0,:
SAMPLE
MINNOW TRP TROT LINE
(CTCH/TRP)(CTCH/LNE)
GILL NET
(CTCH/24H)
HOOlC&LINI
(CTCH/DR)
o
o
o
o
o
o
o
o
o
,'
.'
,."..;
"
0:
:"0'
Q'"
Values -x indicate that this gear type was utilized during the sampling period .
o indicate that this gear type was not utilize4 during the sampling period
':.'.
...
---------.-
- - - - - -_.- - - - - - - -_."_.'- -
Appendix Table EA Sampling effort by habitat location,sampling period,and gear type
on the lower Susitna River,1980-1981.
,·,
SAMPLE
MINNOW TRP TROT LINE
(CTCH/TRP)(CTCH/LHE)
GILL HET
(CTCH/24H)
HOOIC&LINE
(CTCH/BR)
BEACH SN
(CTCH/THE)
ELECTRO
(CTCH/HR)
GILL DRFT .DIP ·NET , .
(CTCH/DRF).«(f.'TCD)·
0"","
"..
,,
0 0
0 0
0 0
0 0 ',
0 0
0 0 ..
0 0 '.
x 0
x 0
Sheep Creek Slough,R.M.66.1,S/22N/04W/30/BAB
DEC x x 0 0 0
,JAN x x 0 0 0
L JUN x x 0 0 0
E JUL x x x 0 0
L JUL x x 0 0 0
E AUG x x 0 0'0
L AUG x x 0 0 0
L SEP x x x 0 0
E OCT 0 0 0 0 0
Goose Creek 1,R.M.72.0,S/23N/04W/31/BBC
L JUN x x 0 0 0
E JUL x x x 0 x
L JUL x x 0 0 0
E AUG x x 0 0 0
L AUG x x 0 0 0
L SEP x x x 0 0
o
o
o
o
o
x
o
x
o
o
o
x
....':.
.,'0':.
,,:0..
·,:.:0,'
.0,
" 0......
"'0·
.:,:'0'
".;0'
",.p..'.."
···.0'.,
·;0
o
.:·.0·
.,0·
:.:0
Values -x indicate that this gear type was utilized during the sampling period
o·indicate that this gear type was not utilized during the sampling period
....
...·.....
.,
Appendix Table EA Sampling effort by habitat location,sampling period,and gear type
on the lower Susitna River,1980-1981.
.'
•~.0"
SAMPLE
MINNOW TRP TROT LINE
(CTCH/TRP)(CTCH/LNE)
GILL NET
(CTCH/24H)
HOOlC&LINE
(CTCH/HR)
BEACH SN
(CTCH/THE)
ELECTRO
(CTCH/HR)
GILL DRFT ",DIP'NET
(CTCH/DRF)''(C'i'cin,,.
Goose Creek 2,R.M.73.1,S/23N/04W/30/BBB
L JUL x x 0 0
E AUG x x 0 0
L AUG x x 0 0
L SEP x x x 0
E OCT 0 0 0 0
Mainstem West Bank,R.M.74.4,S/23N/05W/13/CCD
FEB x x x 0
L JUN x x 0 0
E JUL x x x 0
L JUL x x x 0
E AUG x x x 0
L AUG x x 0 0
L SEP x x x 0
I
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
x
o
o
o
o
o
o
x
o
o
o
o
o
o
o
o
o
o
o
o
"
..':
"·0,.
.:Q ,
'0
'0:.:.-.
o
.~.
.'0'
~':.
',0'
0:..
0'"
',':0
.,,:0''.
.'
Values -x indicate that this gear type was utilized during the sampling period .
o indicate that this gear type was not utilized during the sampling period
".
......,;,.-
- - - - - - - - - - - - - - - --:...-~
Appendix Table EA Sampling effort by habitat location,sampling period,and gear type
on the lower Susitna River,1980-1981.
,:':'
VA11lAA -y inili,.....,...h .....hi"....,......"un..u .........;1.;.......1 ..I ......;.......h.,..........1.;.............;.....1
'~
Appendix Table E4 Sampling effort by habitat location,sampling period,and gear type
on the lower Susitna River,1980-1981.'.
..
SAMPLE
MINNOW TRP TROT LINE
(CTCH/TRP)(CTCH/LNE)
GILL NET
(CTCH/24H)
HOOK&LINE
(CTCH/n)
BEACH SN
(CTCH/THE)
ELECTRO
(CTCH/HR)
GILL DRFT
(CTCH/DU)..'.
:
DIP:NET'·
(CTCH;)
Sunshine Creek,R.M.85.7,S/24N/05W/14/AAB
NOV x 0 0 0 0 0
DEC x 0 0 0 0 0
JAN x x 0 0 0 0
FEB x 0 0 0 0 0
MAR x 0 x 0 0 0
APR x 0 0 0 0 0
MAY x 0 x x 0 0
EJUN x x x 0 0 0
LJUN x x 0 0 0 0
E JUL x x 0 0 0 0
L JUL x x 0 0 0 0
E AUG x x 0 0 0 0
L AUG x x 0 0 0 0
E SEP x x 0 0 0 0
L SEP x x x 0 0 0
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
."
':·0
."c)'......
....p',,:Q::..
'.;",0.::..o'
:0.
"0 ....'
,'0
:9
o
.':'0 :',
'.Q
..···9 ..
',.0
Values -x indicate that this gear type was utilized during the sampling period
o indicate that this gear type was not utilized during the sampling peribd
,
.....
,.
,.°,'0 ••.'
,..•,
,'
.'----
- - - - - - - - - - - - - - -_."_.....- -
.....
Appendix Table EA Sampling effort by habitat location,sampling period,and gear type
on the lower Susitna River,1980-1981.
SAMPLE
MINNOW TRP TROT LINE
(CTCH/TRP)(CTCH/LHE)
GILL NET
(CTCH/24H)
HOOK&LINE
(CTCH/HR)
BEACH SN
(CTCH/THE)
ELECTRO
(CTCH/HR)
GILL DaFt'.
(CTCH/DRP ~.
DIP.NF;T
(q~Cll)
:....-.
Birch Creek Slough,R.M.88.4,S/25N/05W/25/DCC :.
JAN
E JUN
L JUN
E JUL
L JUL
E AUG
L AUG
E SEP
L SEP
E OCT
......
x
x
x
x
x
x
x
x
x
o
o
x
x
x
x
x
x
x
x
o
o
x
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
x
x
o
o
o
o
o
o
o
o
o
o
····:ci
.0,
:'''0',
'0 .
.;:Q.....'
~·o
.'.0.'
l.o.·
.\.q.
'0'..'':.
Birch Creek,R.M.89.2,S/25N/05W/25/ABD
,',':0..
JAN
FEB
MAR
EJUN
L JUN
E JUL
L JUL
E AUG
L AUG
E SEP
x
x
x
x
x
x
x
x
x
x
x
x
o
x
x
x
x
x
x
x
x
x
x
o
x
x
x
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
x
o
o
o
o
o
o
o
o
o
o
..
":0
'.o·
',0
.0
'."0 .-
,'··9·
Q
;'p
'"'0
·,0
Values - x indicate that this gear type was utilized during the sampling period
o indicate that this gear type was not utilized during the sampling period
','
".,.~
Appendix Table EA Sampling effort by habitat location,sampling period,and gear type
on the lower Susitna River,1980-1981..''.'
-~--~---~-----_.-i
MINNOW TRP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DUT DIp::tfF;T .
SAMPLE (CTCH/TRP)(CTCH/LHE)(CTCH/24H)(CTCH/IUl)(CTCH/THE)(CTCH/HR)(CTCH/DU).(eTCH)
."
"
":'
..
Cache Creek Slough,R.M.95.5,S/26N/05W/35/ADC
".....
DEC ,.'0,.,
',x x 0 0 0 0 0
JAN x x 0 0 0 0 0 ':.;~..::.APR ixxX0000
MAY x x x x 0 0 0 '0
EJUN x x 0 0 0
.:'
X 0 o.
L JUN x x x 0 0 0 0 ,,:~.
E JUL x :x 0 0 0 0 0 ....~,
L JUL :x x 0 0 0 0 0 ":'0 '
E AUG x x o'0 0 0 0 ,''0.
L AUG '.
:x :x 0 0 0 0 0 ...:0':'.
E SEP x x 0 0 0 0 0 "0 .
L SEP :x x 0 0 0 0 0 ,;0
E OCT ',
0 0 0 0 0 :x 0 ;'0.'
',...
Cache Creek,R.M.96.0,S/26N/05W/26/DCB ,"
.0 ....
MAY x 0 x 0 0'0 0 .:,'~.:-.
E JUN x x x 0 0 0 0 ",.!J
L JUN x :x x 0 0 0 .0 "0
E JUL x x 0 0 0 ,()0 ..o .....
L JUL :x x 0 0 0 0 0 :0'·
E AUG :x x 0 0 0 0 0 0:',
L AUG x :x 0 0 0 0 0 .0,'
E SEP :x x 0 0 0 0 0 >0.
L SEP :x x 0 0 0 0 0 ';0".
Values - x indicate that this gear type was utilized during the sampling period
o indicate that this gear type was not utilized during the sampling period•
.'
:'.o.
________________•••1'__
- - - - - - - - - - - - - - -..'...:".'-"-•:...'0.:.
'".;.
Appendix Table EA Sampling effort by habitat location,sampling period,and gear type
on the lower Susitna River,1980-1981.
'.'
""..,
"".
SAMPLE
MINNOW TIP TROT LINE
(CTCH/TRP)(CTCH/LHE)
GILL NET
(CTCH/24H)
HOOK&LINE
(CTCH/Ha)
BEACH SN
(CTCH/THE)
ELECTRO
(CTCH/HR)
GILL Daft'.'DIP"'NET '
(CTCH/DRr >.'".(ci"lCH):,.........
;,
Whiskers Creek Slough,R.M.101.2,S/26N/05W/03/ADB
JAN x x 0 0
MAR 0 x x 0
E JUN x x x 0
L JUN x x x 0
E JUL x x x 0
L JUL x x 0 0
E A.UG x x 0 0
L AUG x x 0 0
E SEP x x 0 x
L SEP x x x 0
Whiskers Creek,R.M.101.4,S/26N/05W/03/AAC
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
x
o
o
o
o
o
o
.:,<>.
'0.'~...
.0:'
,;"0:",
'.'
o·''':'0 "
';'Q'"
....:p ...
",0',
.'~'
FEB x x x 0 0 0 0
MAR x 0 0 0 0 0 0
E JUN x x x x 0 0 0
L JUN x x x x 0 0 0
E JUL x x 0 x 0 0 0
L JUL x x 0 0 0 0 .0
E AUG x x 0 0 0 0 0
L AUG x x 0 0 0 0 0
E SEP x x 0 0 0 0 0
L SEP x x 0 x 0 0 0
".
"..
',p','
'0
.'.'0 :'
..' O ..
.·,~.o
"p.
.....;0..
"0 ".....
'.:0:..
:·.··:0,.
'."':,"
Values - x indicate that this gear type was utilized during the sampling period
o indicate that this gear type was not utilized during the sampling period
..
,~
Values - x indicate that this gear type was utilized during the sampling period
o indicate that this gear type was not utilized during the sampling period
-
.",.
",".
--....._.-
- - - - - - - - - - - - - - --"......."--"
Appendix Table EA Sampling effort by habitat location.sampling period.and gear type '.....
",:..;.on the lower Susitna River.1980-1981."
,..'.
MINNOW TaP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DRFT:",DIP',NET
SAMPLE (CTCH/TaP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/DRF)(~~Ii).
:.,'.
-"_'__0'"
...~.-
,"
Mainstem 2.R.M.114.4.S/28N/04W/06/CAB
;'10"
EJUN x x x 0 0 0 0 ;:'0'
L JUN x x x 0 0 0 0 "0.!:0"
E JUL x x x 0 0 0 0 ,':'()"
L JUL x x 0 0 0 0 0 '0 ".,".',;
E AUG x x 0 0 0 0 0 :,:0.
L AUG ,x x 0 0 x 0 0 ,a.
E SEP x x 0 0 0 x 0 'o·
L SEP ..
,,0,:-X X X 0 0 0 0
."
Mainstem Susitna -Curry.R.M.120.7.S/29N/04W/IO/BCD , ,
".'.:'.'.
MAR 0 x 0 0 0 0 0 ,:0 "
APR
•j,."
x x 0 0 0 0 0 ".Q
LJUN x x x 0 0 0 0 :,.:,0...
E JUL x x x 0 0 0 0 ,,',0'
L JUL x x x 0 0 0 0 :'.Q
E AUG x x x 0 0 0 0 ';:~,
L AUG x x 0 0 0 0 0 ......"Q
L SEP ..'.'l
X X X 0 0 x 0 .'0'
'..'.'.
-------;-
Values - x indicate that this gear type was utilized during the sampling'period
o indicate that this gear type was not utilized during the sampling period
"
•,..'.
~:.
Appendix Table EA
,
Sampling effort by habitat location,sampling period,and gear type
on the lower Susitna River,1980-1981.
,',
SAMPLE
MINNOW TRP TROT LINE
(CTCH/TRP)(CTCH/LNE)
GILL NET
(CTCH/24H)
HOOK&LINE
(CTCH/HR)
BEACH SN
(CTCH/THE)
ELECTRO
(CTCH/HR)
GILL DRPT
(CTCH/DRP)
DIP"N~T
(CTCH),
"•.s
Susitna Side Channel,R.M.121.6,S/29N/04W/11/BBB '"
."."
,,
MAR x 0 0 0 0 0 0 ',0
APR x 0 0 0 0 0 0 ',0 "
.",.L JUN x x x 0 0 0 0 .,9,
E JUL x x x 0 0 0 0 ".,'~'.
L JUL x x x 0 0 0 0 .<'o~'
E AUG x x x 0 0 0 0 ..,.a "
L AUG x x 0 0 0 0 0 ',,'0,,
"'L SEP x x x 0 0 0 0 :0:'
.':
Mainstem Susitna -Gravel Bar,R.M.123.8,S/30N/04W/26/DDD :'.."..'.'.
'..L JUN x x x 0 0 0 0 ,0
E JUL x x x 0 0 0 0 ':"0
L JUL x x x 0 0 0 0 '0,'
E AUG x x x 0 0 0 0 ':o.'
"L AUG x x 0 0 0 0 0 .(e,
L SEP x x x 0 0 0 0 ..f):
','.;.'.
-
.'"
Values - x indicate that this gear type was utilized during the sampling period
o indicate that this gear type was not utilized during the sampling period
,;
.--...-............- -
---- ------- - - --_..1IIIi'"_.-..'
•·..'.
Appendix Table EA Sampling effort by habitat location,sampling period,and gear type .
":..'~on the lower Susitna River,1980-1981..........
,.
MINNOW TiP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DRFT :'DIP.:NET
SAMPLE (CTCH/TiP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/DRF)(aTCH)
.........
:
Slough SA,R.M.125.3,S/30N/03W/30/BCD .......\
..'...'.
JAN :·.-'.x 0 0 0 0 0 0 .....-0
FEB x'x 0 0 0 0 0 ,'0.
MAR x 0 0 0 0 0 0 ,.,:0'
APR 0 0 0 0 0 .''..~:0x0
L JUN x x x 0 0 0 0 ..',.:.0':.,:"E JUL x x x x 0 0 0 .·0."..
L JUL x x x 0 0 0 0 0
E AUG x x 0 0 0 0 0 ..'0 ....
L AUG x x 0 x 0 0 0 ..'0
L SEP x x x x 0 0 0 :'0
":-'...
Fourth of July Creek,R.M.131.1,S/30N/03W/03/DAC ..-...
"
.:
L JUN x x x 0 x 0 0 :,..:0'
E JUL x x x x x 0 0 "·0
L JUL x x x x 0 0 0 ··0
E AUG x x 0 x 0 0 0 ..··0 '
L AUG x x 0 x 0 0 0 '0
E SEP x x 0 x 0 0 .0 ..;0
L SEP x x 0 0 0 0 0 ':0·
,.
Values -x indicate that this gear type was utilized during the sampling period
o indicate that this gear type was not utilized during the sampling period
....:,.',
Appendix Table EA Sampling effort by habitat location,sampling period,and gear type
on the lower Susitna River,1980-1981.
'.
.:.
- - - - - - - - - - - - -__1IIiI'"'._
Appendix Table EA Sampling effort by habitat location.sampling period.and gear type
on the lower Susitna River.1980-1981.
.....
.::.
,.
."
"
SAMPLE
MINNOW TaP TROT LINE
(CTCH/TaP)(CTCH/LNE)
GILL NET
(CTCH/24H)
HOOK&LINE
(CTCH/HR)
BEACH SN
(CTCH/THE)
ELECTRO
(CTCH/HR)
GILL DUT ".DIp··..NET:~"
(CTCH/DllF).:.(etCH).'.....
0 0 ,'
.....
Mainstem Susitna -Inside Bend.R.M.136.9.S/31N/02W/17/CDA
JAN 0 x 0 0 0
L JUN x x x 0 0
E JUL x x x 0 0
L JUL x x x 0 0
E AUG x x 0 0 0
L AUG x x 0 0 0
E SEP x x x 0 0
L SEP x x 0 0 0
Indian River.R.M.138.6.S/31N/02W/09/CDA
JAN x x 0 0 ,0
FEB x x 0 0 0
MAR x x 0 0 0
APR x.x 0 0 0
E JUN x x x 0 0
E JUL x x x x 0
L JUL x x x x 0
E AUG x x 0 0 0
L AUG x x 0 x 0
E SEP x x x x 0
L SEP x x x 0 0
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
x
0
0
."
0
0
0
0
0
0
.
..
0
0
0
0
0
0
0
0
0
x
0
"
,'.'..
'<0 ..
;,-'.0'.:,
.Q:
,;"0 ......'.
".J',.:..'
,:~.
;.:··';.0
'.:Q:.,
':.-0..
,."'..'..\:.
:~
:~o .,,
::f)
·..·.·0
~0'..'
~·o
"'0'
,.'.
o'
o
~~:
"0"
Values -x indicate that this gear type was utilized during the sampling period
o indicate that this gear type was not utilized during the sampling period
;","
Appendix Table EA
,',
Sampling effort by habitat location,sampling period,and gear type
on the lower Susitna River,1980-1981.
,,
..
BEACH SN ",MINNOW TiP TROT LINE GILL NET HOOlC&LINE ELECTRO GILL DRFT ,:DIP.'NET'
SAMPLE (CTCH/TRP)(CTCU/LNE)(CTCH/24H)(CTCU/HR)(CTCH/TMB)(CTCH/HR)(CTCH/DRF)':(etCH)"·"...·.'...-,,'
Slough 20,R.M.140.1,S/31N/02W/ll/BBC -,,;4
, ,'"..
FEB x 0 0 0 0 0 0 ,'.0'
MAR
..
",:0:'"x 0 0 0 0 0 0 ...
APR x 0 0 0 0 0 0 0
EJUN x x x 0 0 0 0 ',;"(f '
E JUL x x 0 0 x 0 0 :',0
L JUL x x x 0 0 0 0 ''-:0
",','E AUG x x 0 0 0 0 0 '0,
L AUG x x 0 0 0 0 0 :.';'\0'..
E SEP x x 0 0 0 0 0 '"'c,>,'"',',
L SEP x x 0 0 0 0 0 ,0',
·..:
.~~:.
,.
Mainstem Susitna -Island,R.M.146.9,S/32N/OIW/27/DBC ·0 e'::.
E JUN x x x 0 0 0
E JUL x x x 0 0 0
L JUL x x x 0 0 0
E AUG x x 0 0 0 0
L AUG x x 0 0 0 0
E SEP x x x 0 0 0
L SEP x x x 0 0 x
o
o
o
o
o
x
o
:.',',0
,:',0...
,,.:,0:-0',.
0'
..':P,
::-b'
"
Values -x indicate that this gear type was utilized during the sampling period
o indicate that this gear type was not utilized during the sampling period
"
"'.
.,
.-...iIi _
----------------'-,~-""
Appendix Table EA Sampling effort by habitat location.sampling period.and gear type
on the lower Susitna River.1980-1981.'
<
,'.,
~
MINNOW TRP TROT LINE GILL HET HOOK&LINE BEACH SN ELECTRO GILL DRFT DIP,!JET'·'SAMPLE (CTCH/TRP)(CTCH/LHE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/DRF),(CtCH),
-:--
..
Portage Creek.R.M.148.8.S/32N/OIW/25/CDB ",
,"·.:.
,.~.
•"
FEB x x 0 0 0 0 0 "'':,0,'
MAR x x 0 0 0 0 0 ..;';,0'"
EJUN x x x 0 0 0 0 ~.'.,"'0'
E JUL .'.x x x x x 0 0 0
L JUL x x x 0 0 "."x .0 ,0',',.0 .
E AUG x .".;..
X 0 0 0 0 0 ,"o~.'
L AUG •••0.x x 0 x 0 0 0 ":':0',' ,
E SEP x x x x 0 0 ~· Q •
"0 " .
L SEP x x x 0 0 x 0 '0";.~'.'
,':'
Valu~s -x indicate that this gear type was utilized during the sampling period
o indicate that this gear type was not utilized during the sampling period
·.".·",
.:.
eo ••••.•
}',I
·'.'.
'..
:0
"
Appendix Table EBl.l Catch per unit effort lower Susitna River habitat locations,1980-l9~l,fox
juvenile chinook.
SAMPLE
MINNOW TRP TROT LINE GILL NET HOOK &L INE 'BEACH SN ELECTRO GILL DRFT DIP 'NET
(CTCH/TRP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/B)(CTCH/DU)(CICH).
Alexander Creek Site A,R.H.10.1,T.R.H.0.0,S/15N/07W/06/DCA
,.
JAN .10 0.00 -.00 -.00 -.00 -.00 -.00 "-'.00
E JUL •70 0.00 0.00 -.00 -.00 -.00 -.00 -.•00 .
L JUL .60 0.00 -.00 -.00 -.00 -.00 -.00 ..:..00
L AUG .20 .0.00 -.00 -.00 -.00 -.00 -.00 -.00
Alexander Creek Site B,R.H.10.1,T.R.H.2.0,S/16N/07W/32/CCB
E JUL .60 0.00 0.00 0.00 -.00 -.00 -.00 ~~OO
L JUL 1.60 0.00 -.00 0.00 -.00 -.00 -.00 -.00
L AUG .40 0.00 -.00 -.00 -.00 -.00 -.00 ,-;.00
E SEP .60 0.00 -.00 -.00 -.00 -.00 -.00 -.00
,'."
Alexander Creek Site C,R.H.10.1,T.R.H.4.0,S/16N/07W/30/ACD ".
L JUN •40 0.00 -.00 -.00 -.00 -.00 -.00 :":,,.00
E JUL .70 0.00 -.00 -.00 1.80 -.00 -.00 '7.00
L JUL .50 0.00 -.00 -.00 -.00 -.00 -.00 .-.'00
E AUG .10 0.00 -.00 -.00 -.00 -.00 .-.00 '0.00
L AUG .20 0.00 -.00 -.00 -.00 -.00 -.00 0.00-
E SEP .20 0.00 0.00 -.00 .30 -.00 -.00 -.00 '
Values--.00 indicate no sample taken
- - - - - - - - - - - - - - - ---- -
Appendix Table EBI.I Catch per unit effort lower Susitna River habitat locations,1980-1981,f~r"
juvenile chinook.
~<
SAMPLE
MINNOW TRP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DRFT"DIP:.~ET
(CTCH/TRP)(CTCH/LHE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/DRF)(CTCH)
Anderson Creek,R.M.23.8,S/17N/07W/29/DDD
EJUN
E JUL
E SEP
.10
.10
.20
0.00
0.00
0.00
0.00
0.00
0.00
-.00 -.00 -.00 -.00 :..:00".
....00 -.00 -.00 -.00 :-"00
-.00 -.00 -.00 -.00 ---:..60
".-
Mainstem Slough,R.M.31.0,S/17N/06W/05/CAB .
E JUL •20 0.00 0.00 -.00 -.00 -.00 -.00 -,00
.-
Mid-Kroto Slough,R.M.36.3,S/18N/06W/16/BBC
E JUL 0.00 0.00 0.00 -.00 .40 -.00 0.00 .-."00
E SEP 0.00 0.00 0.00 -.00 .40 -.00 0.08 -.00
L SEP .30 0.00 0.00 -.00 -.00 -.00 -.00 :':.00
Values·-.00 indicate no sample taken
Appendix Table EB1.1
."
Catch per unit effort lower Susitna River habitat locations,1980-1981,f6r
juvenile chinook...
MINNOW TRP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DRFT DIPNE',f .
SAMPLE (CTCH/TRP)(CTCH/LNE)(CTCH/24H)(CTCH/IlR)(CTCH/THE)(CTCH/ua)(CTCH/DRF.)(CtCH)
..
.'.'.
Deshka River Site A,R.M.40.6,T.R.M.0.0,S/19N/06W/35/BDA
E JUL 4.50 0.00 0.00 -.00 -.00 -.00 -.00 .":.~QO
L JUL 1.60 0.00 -.00 -.00 -.00 -.00 -.00 ~"OO .
E AUG .10 0.00 -.00 -.00 -.00 -.00 -.00 ·•..~OO·
L AUG .10 0.00 -.00 -.00 -.00 -.00 -.00
~.OO
E SEP .10 0.00 -.00 -.00 -.00 -.00 -.00 -.•00
Deshka River Site B,R.M.40.6,T.R.M.1.0,S/19N/06W/26/BCB
L JUN .20 0.00 0.00 -.00 -.00 -.00 -.00
·~.OO
E JUL 4.50 0.00 -.00 -.00 -.00 -.00 -.00 .....~oo
L JUL 2.20 0.00 -.00 -.00 -.00 -.00 -.00 -'.00
E AUG .20 0.00 -.00 -.00 -.00 -.00 0.00 ":,,.00
L AUG .30 0.00 -.00 -.00 -.00 -.00 -.00 .:".00
E SEP •20 0.00 -.00 0.00 -.00 -.00 -.00 .-.00 .
L SEP .20 0.00 0.00 -.00 -.00 -.00 -.OO~.:-.00
" "
-
Values=-.00 indicate no sample taken
•
'-
-------------~--~--....
Appendix Table EBI.I Catch per unit effort lower Susitna River habitat locations,,.1980-:1981,for
juvenile chinook.
SAMPLE
MINNOW TRP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DUT 'DIP ,NET
(CTCH/TRP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/DRF);(CtCH)
,",
Deshka River Site C,R.M.40.6,T.R.M.3.5,S/19N/06W/14/BCA
MAR
E JUL
L JUL
E AUG
L AUG
E SEP
L SEP
.10
2.60
.60
.80
.10
.30
.10
0.00
0.00
0.00
0.00
0.00
0.00
0.00
-.00
0.00
-.pO
-.00
-.00
-.00
0.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00'
-.00
-.00
0.00
-.00
-.00
-.00
,-'.00
-.00
:'':-.•00
';~"OO
:.....00··
'·<00'
·~~.OO·.
Lower Delta Island,R.M.44.0,S/19N/05W/19/ACB
L JUN .10 0.00 0.00 -.00 -.00 -.00 -.00 .:-..00
Little willow Creek,R.M.50.5,S/20N/05W/27/AAD
L JUN
E JUL
L JUL
E AUG
L AUG
E SEP
L SEP
2.70
3.60
12.00
3.20
3.60
.30
.40
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
-.00
-.00
-.00
-.00
-.00
-.00
0.00
0.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
0.00 "
-.00 .
-.00
0.00'
0.00,
-.00
-.00
:''':'~OO
~.OO.
.-.()O
:".00
, -00..
....00 ..
..:..00
Values·-.00 indicate no sample taken
Appendix Table EBI.!Catch per unit effort lower Susitna aiver habitat locations,1980-1981,for
juvenile chinook.
MINNOW TaP TaOT LINE GILL NET HOOIC&LINE BEACH SN ELECTaO GILL DaFT DIP NET
SAMPLE (CTCH/Tap)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/Ha)(CTCH/DRF).·(Cr~H)
.
..
austic Wilderness,a.M.58.1,S/21N/05W/25/CBD
...;..
JAN 2.00 0.00 -.00 -.00 -.00 -.00 -.00 ~.OO
MAR 2.70 0.00 0.00 -.00 -.00 -.00 -.00 ...~.OO
MAY .10 0.00 0.00 -.00 -.00 -.00 -.00 -:<00
L JUN 1.00 0.00 -.00 -.00 -.00 -.00 -.00 .7.00
L JUL .60 0.00 0.00 -.00 -.00 -.00 -.00 -0'.00
( E AUG .20 0.00 0.00 -.00 -.00 -.00 -.00 0~.90.
L AUG .10 0.00 0.00 -.00 -.00 -.00 -.00 -.•QO
'.
,"."
lCashwitna River,R.M.61.0,S/21N/05W/13/AAA
NOV .20 -.00 -.00 -.00 -.00 -.00 -.00 ",:,..00
L JUN 13.20 0.00 -.00 -.00 -.00 -.00 0.00 ·~.OO
E JUL .40 0.00 -.00 -.00 -.00 -.00 -.00 .~.·OO
L JUL 2.70 0.00 0.00 -.00 9.00 -.00 0.00 .~:.OO
E AUG 1.60 0.00 -.00 -.00 -.00 -.00 -.00 :-.00
. L AUG .90 0.00 -.00 -.00 -.00 -.00 -.00 -:-.00
L SEB 2.00 0.00 0.00 -.00 -.00 0.00 -.00 :.:..~OO
E OCT -.00 -.00 -.00 -.00 -.00 12.00 -.00 0~"90..~..
~
Values--.00 indicate no sample taken
- - - - - - - - - - - - - - --.':-'--.. ......
Appendix Table EB1.1 Catch per unit effort lower Susitna River habitat locations,1980-1981,fpr·.
juvenile chinook.. .
MINNOW TRP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DRFT DIP'HE.T
SAMPLE (CTCH/TiP)(CTCH/LNE)(CTCH/24H)(CTCH/Hi)(CTCH/THE)(CTCH/Hi)(CTCH/DU)(C1=CH)
-.."
Caswell Creek,R.M.63.0,S/21N/04W/06/BDD ..
NOV .60 -.00 -.00 -.00 -.00 -.00 -.00 "':-:~00
MAY .10 -.00 0.00 0.00 -.00 -.00 -.00'.~.OO
L JUN 1.90 0.00 -.00 -.00 -.00 -.00 -.00 --:00..'.'.
E JUL 2.50 0.00 -.00 -.00 -.00 -.00 -.00 .~~OO
L JUL 11.90 0.00 0.00 -.00 -.00 -.00 -.00 -;00
E AUG'7.70 0.00 -.00 -.00 -.00 -.00 -.00 -:.00
L AUG 9.40 0.00 -.00 -.00 -.00
-.00 -.00
~.·.OO
L SEP 3.20 0.00 0.00 -.00 -.00 -.00 -.00 ';';.00
..",.
Slough West Bank,R.M.65.6,S/22N/05W/27/ADC
,
L SEP .10 0.00 0.00 -.00 -.00 0.00 -.00 ..'·...:,00
:
Sheep Creek Slough,R.M.66.1,S/22N/04W/30/BAB,
DEC •20 0.00 -.00 -.00 -.00 -.00 -.00 .::"~O9
L JUN .10 0.00 -.00 -.00 -.00 -.00 -.00 ·~.OO
E JUL .20 0.00 0.00 -.00 -.00 -.00 .-.00 -'.00,
L JUL 1.30 0.00 -.00 -.00 -.00 -.00 -.00 .·~.OO
E AUG 1.40 0.00 -.00 -.00 -.00 -.00 -.00 .·....00
L AUG 2.40 0.00 -.00 -.00 -.00 -.00 -.00 ...~'OO
L SEP .10 0.00 0.00 -.00 -.00 0.00 -.00 ',,:,:.QO
..:.
'.
Values=-.00 indicate no sample taken
,
Appendix Table EB1.1 Catch per unit effort lower Susitna River habitat locations,1980-1981,fQr
juvenile chinook." "
SAMPLE
MINNOW TRP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DRFT 'Dn~;'NE,:T,
(CTCH/TRP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/DRF)"(Cl1CH)'
....
Goose Creek I,R.M.72.0,S/23N/04W/31/BBC
L JUN 3.90 0.00 -.00 -.00 -.00 -.00 -.00 '-:.00'
E JUL 2.10 0.00 0.00 -.00 0.00 -.00 0.00''~_.()O,,
L JUL 17.80 0.00 -.00 -.00 -.00 -.00 -.00 '';'''.00
E AUG 1.70 0.00 -.00 -.00 -.00 -.00 -.00
•'~~:OO
L AUG 2.10 0.00 -.00 -.00 -.00 -.00 -.00',:':~'00
,.
L SEP •30 0.00 0.00 -.00 -.00 0.00 0.00 "r.;0(l...
:,'
Goose Creek 2,R.M.73.1,S/23N/04W/30/BBB ,.-.
L JUL 4.50 0.00 -.00 -.00 -.00 -.00 -.00 ":".00
E AUG .20 0.00 -.00 -.00 -.00 -.00 -.00 ,,,'.-.00
L AUG 1.40 0.00 -.00 -.00 -.00 -.00 -.00 '':',~OO
L'SEP 1.10 0.00 0.00 -.00 -.00 -.00 -.00 .i.OO
Values·-.00 indicate no sample taken
,,'
~
i o'
-
- - - - -_.---- - - ----,-"._.-,.'
Appendix Table EB1.l Catch per unit effort lower Susitna River habitat locations,1980-1981,fo~,,
juvenile chinook..
SAMPLE
MINNOW TaP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DRrT '.DIP'"NET
(CTCH/TRP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HiO (CTCH/DRr):.(C',r~H)'
."
Mainstem West Bank,R.M.74.4,S/23N/05W/13/CCD .',.
L AUG .10 0.00 0.00 -.00 -.00 -.00 -.00
L SEP .10 0.00 0.00 -.00 -.00 4.00 -.00
Montana Creek,R.M.77.0,S/23N/04W/07/ABA
NOV '.50 -.00 -.00 -.00 -.00 -.00 -.00
L JUN 2.90 0.00 0.00 0.00 -.00 -.00 -.00
E JUL 6.40 0.00 -.00 -.00 -.00 -.00 -.00
L JUL 14.50 0.00 -.00 -.00 -.00 -.00 -.00
E AUG 23.50 0.00 -.00 -.00 -.00 -.00 -.00
L AUG 6.90 0.00 -.00 -.00 -.00 -.00 -.00 .,
E SEP 1.00 0.00 -.00 -.00 -.00 -.00 -.00
L SEP 3.20 0.00 -.00 -.00 -.00 -.00 -.00
Values=-.00 indicate no sample taken
.:":,,"~OO .
..;.:.QO .
.'
,'..0.0.
':_~OO '.
,0 ..00
.;.~OO .:
:'''00 '
,·-.J)O..
.-:00 .
.:.:QO .
,,~~QO '
,.
.
..
Appendix Table EBl.l Catch per unit effort lower Susitna River habitat locations.1980-1981.fC?J;'
juvenile chinook.,.'. .~..
'","
MINNOW TRP TROT LINE GILL NET HOOlC&LINE BEACH SN ELECTRO GILL DUT ,.DIP,N~T '
SAMPLE (CTCH/TRP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/DRr)(CTCH).,.
: •pt.
,"
Mainstem 1.R.M.84.0.S/24N/05W/I0/DCC
EJUN .70 0.00 0.00 -.00 -.00 -.00 -.00 ....00
E JUL .30 0.00 0.00 -.00 -.00 -.00 -.00 .~..OO
L JUL .10 0.00 -.00 -.00 -.00 -.00 -.00 -"00 ::
E SEP .10 0.00 -.00 -.00 -.00 -.00 -.00 '.,~,~ob,.
L SEP .20 0.00 0.00 -.00 -.00 0.00 -.00 .'-.•QO.,.'
I"•
Sunshine Creek.R.M.85.7.S/24N/05W/14/AAB ...
NOV .40 -.00 -.00 -.00 -.00 -.00 -.00
,';':.00 '
JAN .60 0.00 -.00 -.00 -.00 -.00 -.00 ,'.-.00 '
MAR .10 -.00 0.00 -.00 -.00 -.00 -.00
"'';,:00',....
E JUN 2.50 0.00 0.00 0.00 -.00 -.00 -.00 ",~..OO '
L JUN .30 0.00 -.00 -.00 -.00 -.00 -.00 ...00
E JUL .50 0.00 -.00 -.00 -.00 -.00 -.00'',~·:OO,
L JUL .10 0.00 -.00 -.00 -.00 -.00 -.00 ,':',.00
E SEP .10 0.00 -.00 -.00 -.00 -.00 -.00 '-::-~OO,
L SEP .20 0.00 0.00 -.00 -.00 -.00 -.00 .:.~OO
Values=-.00 indicate no sample taken
....
·.- - - - - - - - - - - - - - - _ -.-'\'.'
Appendix Table EB1.1 Catch per unit effort lower Susitna River habitat locations,1980-19.81,for
juvenile chinook...:'.
....
Values--.00 indicate no sample taken
'.'
Appendix Table EB1.l
,.
,.'',.
SAMPLE
MINNOW TaP TROT LINE GILL NET HOOK&LINE
(CTCH/TaP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)
~
BEACH SN ELECTRO GILL DRFT
(CTCH/THE)(CTCH/HR)(CTCH/DRF)
DIP ~ET",:.
(CrCH)
,,..~.
':,-
Cache Creek Slough,R.M.95.5,S/26N/05W/35/ADC ''
JAN .10 0.00 -.00 -.00 -.00 -.00 -.00
HAY .10 0.00 0.00 0.00 -.00 -.00 -.00
E JUN .10 0.00 0.00 -.00 -.00
-.00 -.00 .
E JUL .20 0.00 0.00 -.00 -.00 -.00 -.00
E AUG .10 0.00 -.00 -.00 -.00 -.00 -.00
L SEP .20 0.00 -.00 -.00 -.00 -.00 -.00 .
Cache Creek,R.M.96.0,S/26N/05W/26/DCB \I '..
E JUN .10 0.00 0.00 -.00 -.00 0.00 -.00
L JUN .10 0.00 0.00 -.00 -.00 -.00 -.00
L JUL .10 0.00 -.00 -.00 -.00 -.00 -.00
L AUG .10 0.00 -.00 -.00 -.00 -.00 -.00 ,"
Values·-.00 indicate no sample taken
·':',00'
~~'OO'
,:",".00"
'''~OO
~::-.:00 '
i7"OO";
,:
~.OO "
';'.00';
-..00'
,:"":.0.0,
"·'·0
..'~
.'
----
- - ---/- - ---- - ----;..'-,.-Appendix Table EB1.2 Catch per unit effort lower Susitna River habitat locations.1980,:",1.9'81,for·"
0+chinook.:,:',
SAMPLE
MINNOW TRP TROT LINE GILL HET HOOK&LINE BEACH SN ELECTRO GILL DRFT "DIP"NET .-
(CTCH/TRP)(CTCH/LHE)(CTCH/24H)(CTCH/DR)(CTCH/THE)(CTCH/DR)(CTCH/DRF),(C1QH}';
Values--.00 indicate no sample taken
..:\
Appendix Table EB1.2
"'
Catch per unit effort lower Susitna River habitat locations,1980-19,81,fpr'
0+chinook.' ,
"
"
'SAMPLE
MINNOW TRP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DaFT,Dtp'NET
(CTCH/TRP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/DRt>,(CTC~)','
,"~'..
1 •.0°
Slough 6A,R.M.112.3,S/28N/05W/13/CAC
MAR 20.00 0.00 -.00 -.00
L JUL .20 0.00 0.00 -.00
L AUG .10 0.00 0.00 -.00
E SEP 3.10 0.00 -.00 -.00
L SEP 2.40 0.00 0.00 -.00
Lane Creek,R.M.113.6,S/28N/05W/12/ADD
E JUL .10 0.00 '0.00 -.00
E AUG .10 0.00 -.00 -.00
L AUG .30 0.00 ,-.00 -.00
E SEP 1.90 0.00 -.00 -.00
L SEP 8.00 0.00 -.00 -.00
-.00 -.00 -.00 '
-.00 -.00 -.00
0.00 -.00 -.00 ":,
-.00 0.00 -.00
-.00 -.00 -.00
~~OO:
,:".QO
o.:...OQ "
-.00
,';',~OO '
...•
','.,,".:..-
-.OQ,
:~.OO
~~OO
~7.00 "
-~O
Values--.00 indicate no sample taken
......:
"
"
---
.-'.- - - - - - - - - - - - - - --_:--Appendix Table EB1.2
'.....
Catch per unit effort lower Susitna River habitat locations,1980-1981,fo.r·:
0+chinook.
SAMPLE
,..
MINNOW TRP TROT LINE GILL NET HOOlC&LINE BEACH SN ELECTRO GILL DRFT'DIP.NET'"
(CTCH/TRP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/TME)(CTCH/HR),(CTCH/DRF),(C·;:CH).
.,
~:"
Mainstem 2,R.M.114.4,S/28N/04W/06/CAB
E JUL .10 0.00 0.00 -.00 -.00 -.00 -.00 ~.OO·'
E AUG .10 0.00 -.00 -.00 -.00 -.00 -.00 -:'.00 .
L AUG .20 0.00 -.00 -.00 0.00 -.00 -.00 ....'o~.~OO·.
E SEP .90 0.00 -.00 -.00 -.00 0.00 -.00 0 ~;OO~..-~
,.
Mainstem Susitna -Curry,R.M.120.7,S/29N/04W/I0/BCD ."
".,
0'
L SEP 0.00 0.00 0.00 -.00 -.00 10.00 -.00 .'.'-'~OO
,
Susitna Side Channel,R.M.121.6,S/29N/04W/ll/BBB :
MAR
APR
L AUG
L SEP
.01
.10
.10
.10
-.00
-.00
0.00
0.00
-.00
-.00
0.00
0.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00 .
-.00
-.00
-.00
...•·00., .
:'-:.00'
:....00 .'
·;;'~OO
-..,
'.','
Values--.00 indicate no sample taken
"
.',
.'
,"'.
Appendix Table EB1.2
...'.
Catch per unit effort lower Susitna River habitat locations.1980-19&1.for
O+ch~o~·.
.,
SAMPLE
MINNOW TaP TROT LINE GILL NET HOOK&LINE
(CTCH/TaP)(CTCH/LHE)(CTCH/24H)(CTCH/HR)
BEACH SN ELECTRO
(CTCH/TME)(CTCH/HR)
GILL DRFT.
(CTCH/DRF).
DIP'NET .
(CT.CH),.'
.;~
:',
..:.O().....•
,-:.00
.",..
."
:...~pO:
.·r::~OO
~.OO .'
...._·•.00 ,
~:';QO.
'~.OO
,:-.!oO~
..
.
....
.·-.'.00·
:;;';',00'
:-:.OQ;.po .'
:'.00'
.';'.00
;".QO ."
..
Values--.00 indicate no sample taken
"
:.
- - - - - - - - - - - - - - -•._.•-.'.~.
Appendix Table EB1.2 Catch per unit effort lower Susitna River habitat locations,1980~r981,fQr
0+chinook.:',.'
'.'.
SAMPLE
MINNOW TRP TROT LINE GILL NET HOOIC&LINE BEACH SN ELECTRO GILL DRFT DIPUE,r,"
(CTCH/TRP)(CTCH/LHE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/DRF)'(CT<;Hr:'
Slough 10,R.M.133.8,S/31N/03W/36/AAC
JAN 2.30 0.00 -.00 -.00 -.00 -.00 -.00
FEB 2.40 0.00 -.00 -.00 -.00 -.00 -.00
MAR 1.10 -.00 -.00 -.00 -.00 -.00 -.00
APR 1.10 -.00 -.00 -.00 -.00 -.00 -.00
L JUL .50 0.00 0.00 0.00 0.00 -.00 -.OO~:
E AUG 1.50 0.00 0.00 -.00 -.00 -.00 -.00
L AUG 1.80 0.00 -.00 -.00 -.00 ·-.00 -.00''.'
E SEP .70 0.00 -.00 -.00 -.00 -.00 0.00 "
L SEP 5.50 0.00 0.00 -.00 -.00 -.00 -.00
Slough II,R.M.135.3,S/31N/02W/19/DDD •
JAN 2.00 -.00 -.00 -.00 -.00 -.00 -.00
APR 0.00 -.00 -.00 -.00 0.00 -.00 -.00 .,
L JUN .10 0.00 -.00 -.00 0.00 -.00 -.00
L AUG 2.30 0.00 0.00 -.00 -.00 -.00 -.00
E SEP .10 0.00 -.00 -.00 -.00 -.00 -.00
L SEP 1.90 0.00 -.00 -.00 -.00 -.00 -.00 ,
"
Values=-.OO indicate no sample taken
..
'..
:";'~',OO::
..~·~OO·
·....00·
:.~.'off '
·_·'00·~::OO
·'~.O()
"-.'00•.'!'
.~.OO .
,,
'.1),•
.,.;..~0(1
~..
'2.00"
.-:-.00 '
'-:00
.-~OO
':-.'00 .."..
Appendix Table EB1.2
.:.....
Catch per unit effort lower Susitna River habitat locations.1980':'19'81.fo'r''..
0+chinook.:,',
SAMPLE
MINNOW TRP TROT LINE GILL NET HOOlC&LINE BEACH SN ELECTRO GILL DRlT ,DIP'NET
(CTCH/TRP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/Hi)(CTCH/DRl)"(~CIJ),
"','
Mainstem Susitna -Inside Bend.R.M.136.9.S/31N/02W/17/CDA
L AUG .80 ().OO 0.00 -.00 -.00 -.00
E SEP .10 0.00 0.00 -.00 -.00 -.00
L SEP .20 0.00 -.00 -.00 -.00 -.00
Indian River.R.M.138.6.S/31N/02W/09/CDA
EJUN .10 0.00 0.00 -.00 -.00 -.00
E JUL .10 0.00 0.00 0.00 -.00 -.00
L JUL •50 0.00 0.00 0.00 -.00 -.00
E AUG 1.60 0.00 -.00 -.00 -.00 -.00
L AUG .20 0.00 -.00 0.00 -.00 -.00
E SEP 8.00 0.00 0.00 0.00 -.00 -.00
L SEP 6.50 0.00 0.00 -.00 -.00 0.00
-.00 '
-.00
-.00
-.00
-.00 ....
-.00
-.00
-.00 ,',
0.00
-.00
.....
"
'-.00 '
:.:-...-00·
:-~OO
"..
,-.00
~-~,OO'
;".00.
,'-,,00 ....
,:~.OO.
~'OO '.'..'.
,~•.OO
Values·-.00 indicate no sample taken
..
!-
- - - - - - - - - - - - - - -_._.- -..:":'.',"
Appendix Table EB1.2
••'f
Catch per unit effort lower Susitna River habitat locations.1980-19:81.for "
0+chinook.
I
Slough 20.R.M.140.1.S/31N/02W/11/BBC
FEB 5.90 -.00 -.00 -.00
MAR..70 -.00 -.00 -.00
API.3.80 -.00 -.00 -.00
L JUL .10 0.00 0.00 -.00
E AUG .10 0.00 -.00 -.00
L AUG 1.20 0.00 -.00 -.00
E SEP 4.10 0.00 -.00 -.00
L SEP 11.70 0.00 -.00 -.00
SAMPLE
MINNOW TBP TROT LINE GILL NET HOOK&LlNE
(CTCH/TBP)(CTCH/LNE)(CTCH/24H)(CTCH/Hi)
BEACH SN ELECTRO GILL DRFT·DIP.NET
(CTCH/THE)(CTCH/HR)(CTCH/DRF)'I (~O~)
...;
....
"
..
-.00 -.00 -.00
:"~OO .
-.00 -.00 -.00 .I:-',~'OO ;
-.00 -.00 -.00 .··.:,..•.00..'
0.00 -.00 -.00 ..'~,.~O ,
-.00 -.00 -.00 ' '.:..00
-.00 -.00
-.00 .:."i-.OO'
-.00 -.00 -.00,.··..·00.•....
-.00 -.00 -.00 ..-:.Op
,,'..
Mainstem Susitna -Island.R.M.146.9.S/32N/OIW/27/DBC
EJUN
E JUL
.10
.10
0.00
0.00
0.00
0.00
-.00
-.00
-.00
-.00
-.00
-.00
,"
,"
-.00 .'..-..·OQ
- •00 ,,.,:"~00'.
"
Values=-.00 indicate no sample taken
'.
":.,
'..
,'.
'.
"'.",
Appendix Table EB1.2 Catch per unit effort lower Susitna River habitat locations,1980-1981,for:
0+chinook.
~
.::
MINNOW TRP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DUT DI,·'·NET·'
SAMPLE (CTCH/TRP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/n)(CTCH/DRF).'(C~~H).:'
'.",.
,'.
Portage Creek,R.M.148.8,S/32N/OIW/25/CDB ..·.,,'"·.''.
"'..·",'.
E JUL .30 0.00 0.00 0.00 21.00 -.00 -.00 :..~.,OO
L JUL .10 0.00 0.00 0.00 -.00 -.00 -.00
.·....00:··
L AUG .20 0.00 -.00 0.00 -.00 -.00 -.00 '.,''''7,.00'''
E SEP .10 0.00 0.00 0.00 -.00 -.00 0.00 .~~OO·
L SEP .30 0.00 0.00 -.00 -.00 0.00 -.00 '.,·-...00 ;
.".
Values=-.00 indicate no sample taken ....
,.'.• J '.
'.
,,.
.....
,'.
....
..".
...'..'.'...'..'
;
......".
.'
- - - - - - - - - - - - - - - _.....;:.-Appendix Table EB1.3 Catch pe~unit effo~t lowe~Susitna Rive~habitat locations,1980~19a1,fo~~
1+chinook.
..,
SAMPLE
MINNOW TaP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DRFT .DIl~'tJET.
(CTCH/TaP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/DRF)(CtcH)
....
Whiskers Creek Slough,R.M.101.2,S/26N/05W/03/ADB
EJUN
L JUN
L JUL
.40
.10
.10
0.00
0.00
0.00
0.00
0.00
0.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
0.00
-.00
.";,,,.OQ '.
..-·.00,
.<00'
'.Whiskers Creek,R.M.101.4,S/26N/05W/03/AAC
.,
,"
~,
"
MAR .01 0.00 0.00 0.00 -.00 -.00 -.00 .:~'OO:'....
E JUN .10 0.00 0.00 0.00 -.00 -.00
-.00'~:.OO::'.
....
..
Slough 6A,R.M.112.3,S/28N/05W/13/CAC
EJUN
L JUN
.10
•40
0.00
0.00
0.00
0.00
0.00
-.00
-.00
-.00
-.00
-.00
-.00 ."
-.00 .
",~',OO
-.00
,"
....
Values--.00 indicate no sample taken
....
,
......
".
'.
."
Appendix Table EBI.3
SAMPLE
MINNOW TRP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DRFT ..~.DIP::.NET.
(CTCH/TRP)(CTCH/LHE)(CTCH/24H)(CTCH/HR)(CTCH/TME)(CTCH/HR)(CTCH/DRF),(C~CH)'
'..
Mainstem 2,R.M.114.4,S/28N/04W/06/CAB
E JUL .10 0.00 0.00 -.00 0.00 0.00 -.00 ,',;";~OO'
.>
Mainstem Susitna -'Curry,R.H.120.7,S/29N/04W/I0/BCD
\
L JUN .10 0.00 0.00 -.00 0.00 0.00 -.00
Mainstem Susitna -Gravel Bar,R.H.123.8,S/30N/04W/26/DDD .•0;
L JUN .40 0.00 0.00 -.00 -.00 0.00 -.OO~
E JUL .10 0.00 0.00 -.00 -.00 -.00 -.00
Fourth of July Creek,R.H.131.1,S/30N/03W/03/nAC
L JUN 0.00 0.00 0.00 0.00 1.00 -.00 -.00
E JUL .10 0.00 0.00 0.00 0.00 -.00 -.00
L JUL •10 0.00 0.00 0.00 -.00 -.00 -.00.
Values--.00 indicate no sample taken
"
..'
.........:'.
'7.9 0 ,
,.
. ..~.
.'.'
"!':.OO ' ' " '
.'.-'.00
,,'
·;~.:OO'.
.'.·-.QO
·::·~:.OO .
,"
'..
"
----------------~.._-
Appendix Table EB1.3 Catch per unit effort lower Susitna River habitat locations.1980-1?81.fo'.,,'.
1+chinook.
:
SAMPLE
MINNOW TRP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DRFT ,~.DIP.NET .
(CTCU/TRP)(CTCU/LNE)(CTCU/24U)(CTCU/HB.)(CTCU/TME)(CTCU/HR)(CTCU/DR¥).(C~CU)
....'..
,,
,:
Mainstem Susitna -Inside Bend.R.M.136.9.S/31N/02W/17/CDA .
"
L JUN .10 0.00 0.00 0.00 0.00 -.00 0.00 '0.00':,;...
."...
Mainstem Susitna -·Island.R.M.146.9.S/32N/01W/27/DBC ..-..:
E JUN
E JUL
.10
.10
0.00
0.00
0.00
0.00
0.00
-.00
0.00
-.00
0.00
-.00
0.00
-.iOO ,.'
..,.;·~oo
·~.G(}
..'
"..-,
Values·-.00 indicate no sample taken ..
"
"'."
"
'..".
,-
.'
,,
Appendix Table EB2.1 Catch per unit effort lower Susitua River habitat locations.1980~r981.fQr ",
juvenile coho.,"",
."
SAMPLE
MINNOW TIP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DUT"DIIl':'NET
(CTCH/TIP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/DRF)(CTC,Ii)"....,
,.. .
, ,
,"
Alexander Creek Site A.R.M.10.1.T.R.M.0.0.S/15N/07W/06/DCA
JAN .30 0.00 -.00 -.00 -.00 -.00 -.00
MAR .10 0.00 0.00 -.00 -.00 -.00 -.00
E JUN .10 -.00 -.00 -.00 -.00 -.00 -.00
E JUL .10 0.00 -.00 -.00 -.00 -.00 -.00,
L JUL .20 0.00 -.00 -.00 -.00 -.00 -.00
E AUG .10 0.00 -.00 -.00 -.00 -.00 -.00 -,
L AUG .30 0.00 -.00 -.00 -.00 -.00 -.00 "
E SEP .30 0.00 -.00 -.00 -.00 -.00 -.00
Alexander Creek Site B.R.M.10.1.T.R.M.2.0.S/16N/07W/32/CCB
MAR .30 0.00 0.00 0.00 -.00 -.00 -.00
L JUL •40 0.00 -.00 0.00 -.00 -.00 -.00 .
E AUG .20 0.00 -.00 -.00 -.00 -.00 -.00
, L AUG 1.50 0.00 -.00 -.00 -.00 -.00 -.00
E SEP .30 0.00 -.00 -.00 -.00 -.00
-.00 '
.....
:';'~OO'....
"7'·'00,'
,',:".00 '
,~.OO
;:'.09
-.00
:t:'.OO '
-,.00,..~:..:..
,"
.'..
"
,~:OO '
".-..O(f'::
.'~!"oo
;,~,"OO
,.;..O(~
Values·-.00 indicate no sample taken
",
- - - - - - - - - - - - --'- - - - -
Appendix Table EB2.1 Catch per unit effort lower Susitna River habitat locations,1980-1981,i~'r'"
juvenile coho.
SAMPLE
MINNOW TRP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DRFT '"DIP~NEl
(CTCH/TllP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/DR~)'(9TCH)·
.,".,Alexander Creek Site C,R.M.10.1,T.R.M.4.0,S/16N/07W/30/ACD
L JUN .20 0.00 -.00 -.00 -.00 -.00 -.00
E JUL .10 0.00 -.00 -.00 2.00 -.00 -.00·
L JUL .40 0.00 -.00 -.00 -.00 -.00 -.00
E AUG .40 0.00 -.00 -.00 -.00 -.00 -.00'
L AUG 1.30 0.00 -.00 -.00 -.00 -.00 -.00
E SEP •40 0.00 0.00 -.00 0.00 -.00 -.00·,
Anderson Creek,R.M.23.8,S/17N/07W/29/DDD ..
L AUG .40 0.00 0.00 -.00 -.00 -.00 -.00
E SEP 1.00 0.00 0.00 -.00 -.00 -.00 -.00
L SEP •20 0.00 4.00 -.00 -.00 -.00 -.00
",
Kroto Slough Mouth,R.M.30.1,T.R.M.2.0,S/17N/07W/Ol/DBC ,.,
E SEP .10 0.00 0.00 -.00 -.00 -.00 -.00
,.
"
-'.00 "
,'10;-.00 .
'::'::00
;O'~QO :,
:',O~OO'".
·~~bo ....~."
,,
:~~OO'
~.OO".
~.OO..
.~.~'..
-~OO ,
Values=-.00 indicate no sample taken
,.':.
Appendix Table EB2.1
..
-.....'.."
Catch per unit effort lower Susitna River habitat locations,1980-1981,for.·
juvenile coho."...
SAMPLE
:--~.~.----.---------;--~-
MINNOW TRP TROT LINE GILL NET HOOk&LINE BEACH SN ELECTRO GILL DRrT'. .DIP"NET',..
(CTCH/TRP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/DRr)(C!~H)·.·
"
'.'
Mainstem Slough,R.M.31.0,S/17N/06W/05/CAB
E JUL .10 0.00 0.00 -.00 -.00 -.00 -.00
Mid-Kroto Slough,R~M.36.3,S/18N/06W/16/BBC
L AUG 0.00 0.00 0.00 -.00 .20 -.00 0.00
L SEP .20 0.00 0.00 -.00 0.00 -.00 -.00
Deshka River Site A,R.M.40.6,T.R.M.0.0,S/19N/06W/35/BDA
MAY 0.00 0.00 .50 -.00 -.00 -.00 -.00'
E JUL .40 0.00 -.00 -.00 -.00 -.00 -.00,
L JUL .20 0.00 -.00 -.00 -.00 -.00 -.00 .
E AUG .10 0.00 -.00 -.00 -.00 -.00 -.00,. :
L AUG .30 0.00 -.00 -.00 -.00 -.00 -.00
E SEP .20 0.00 -.00 -.00 -.00 -.00 -.00
..
".
,:,,'.00
.'
.:\",'.
".'.'
~-:..OO ".
.~""OO.
"'....
....
:'...00'
'-:.r""-..:..00
·.;.,~OO '.:
.'::"00 .'.
.::-'~00 ':.'
·....00
,..
Values·-.00 indicate no sample taken
"
....."
•''\0
---
- - - - - - - - - - - - - - --','.::',- -
Appendix Table EB2.1 Catch per unit effort lower Susitna R.iver habitat locations,1980-19fU,f9r>"".
juvenile coho.':.:.:
:
"
SAMPLE
HINNOW TRP TROT LINE GILL HET HOOK&LINE
(CTCH/TRP)(CTCH/LHE)(CTCH/24H)(CTCH/HR)
BEACH SN ELECTRO
(CTCH/THE)(CTCH/HR)
GILL DilT,
(CTCH/DRl),
~-.'
Deshka River Site B,R..H.40.6,T.R.H.1.0,S/19N/06W/26/BCB
MAY .10 0.00 0.00 -.00 -.00 -.00
L JUN .10 0.00 '-.00 -.00 -.00 -.00
E JUL .40 0.00 -.00 -.00 -.00 -.00
L JUL .30 '0.00 -.00 -.00 -.00 -.00
E AUG .70 0.00 -.00 -.00 -.00 -.00
LAUG 1.30 0.00 -.00 -.00 -.00 -.00
E SEP .40 0.00 -.00 0.00 -.00 -.00
L SEP .30 0.00 0.00 -.00 -.00 -.00
Deshka River Site C,R.H.40.6,T.R.H.3.5.S/19N/06W/14/BCA
E JUL .50 0.00 0.00 -.00 -.00 -.00
L JUL .20 0.00 -.00 -.00 -.00 -.00
E AUG 1.40 0.00 -.00 -.00 -.00 -.00
L AUG 1.70 0.00 -.00 -.00 -.00 -.00
E SEP 1.00 0.00 -.00 -.00 -.00 -.00
L SEP .30 0.00 0.00 -.00 -.00 -.00
Values·-.00 indicate no sample taken
,
-.00
-.00 ,:,
-.00 :"
-.00 ,,'
0.00
-.00-
-.00 '
-.00 "".,
-.00
-.00
0.00"' ,
-.00 "
-.00
-.00
..
.'
"
.:.:'0:0····,.....
0:-'.PO
"~~OO
--~OO"
·7~'.OO·. ,
,",.09 '
';".00,",
..~~OO '
'..
"
..•.
,::-~oo
,f'.•OO ..
,':;.:00
,;....00
',':;'00
,,,'
-:'-::.,00
~.;'"
','
Appendix Table EB2.1 Catch per unit effort lower Susitna River habitat locations,1980-1981,fci~',
juvenile coho.'
SAMPLE
MINNOW TaP TROT LINE GILL NET HOOK&LINE
(CTCH/TaP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)
/
BEACH SN ELECTRO GILL DUT·.··DIP 'NET
(CTCH/THE)(CTCH/HR)(CTCH/DRF)'(C~CH).
'0 ••
,.',.,
Little Willow Creek,R.M.50.5,S/20N/05W/27/AAD
EJUL .10 0.00 0.00 0.00
E AUG .20 0.00 -.00 -.00
L AUG .40 0.00 -.00 -.00
E SEP .20 0.00 -.00 -.00
L SEP .50 0.00 -.00 -.00
Rustic Wilderness,R.M.58.1,S/21N/05W/25/CBD
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
0.00
0.00
0.00
-.00
-.00 .'~..
::".00'
~,.OO :.
o;'_'~OO
·"::..00
·-.QO "
0.".
'.....
'....
NOV .10 -.00 -.00 -.00 -.00 -.00 -.00
...·..~QO.'..'.
JAN .60 0.00 -.00 -.00 -.00 -.00 -.00',.'......00
MAR..70 0.00 0.00 -.00 -.00 -.00 -.00 .·:--.0.0
MAY .10 0.00 0.00 -.00 -.00 -.00 -.00 .;~OO'
".
".''
".
Kashwitna River,R.M.61.0,S/21N/05W/13/AAA ·......
';:-
NOV .10 0.00 0.00 -.00 -.00 -.00 -.00 ~~OO.,.
L JUN .10 0.00 -.00 -.00 -.00 -.00
0.00 '.··-:-,OQ.
E AUG .10 0.00 0.00 -.00 0.00 -.00 .0.00 :~...OO.
L AUG .10 0.00 -.00 -.00
-.00 -.00 -.00 ·...;·.00 .
L SEP .10 0.00 0.00 -.00 -.00 0.00 -.00 .··..,.·QO
~-~----,---~.--::.:
Values--.00 indicate no sample taken .:
."
- - - - - - - - - - - - - - - - __.-."..
Appendix Table EB2.1 Catch per unit effort lower Susitna River habitat locations,1980-~981,fQl".'.
juvenile coho.",:~
SAMPLE
."..
MINNOW TiP TROT LINE GILL NET HOOIC&LINE BEACH SN ELECTRO GILL DRFT'.DIP NET'
(CTCH/TiP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/SR)(CTCH/DRF)'(CtC,U)
·0"'.'
Caswell Creek,R.M.63.0,S/21N/04W/06/BDD '..;"'.:
.,'
NOV .20 -.00 -.00 -.00 -.00 -.00 -.00'';'-.00.
L JUN .20 0.00 0.00 0.00 -.00 -.00 -.00 .·.....·00
EJUL 1.20 0.00 -.00 -.00 -.00 -.00 -.00 .·~~,(jO ..
L JUL 9.10 0.00 0.00 -.00 -.00 -.00 -.00.''::-'.00 , "
E AUG 19.10 0.00 -.00 -.00 -.00 -.00 -.00 ".":...•00·....
L AUG 41.00 0.00 -.00 -.00 -.00 -.00 -.00·';..:..~OO .
",L SEP 2.00 0.00 0.00 -.00 -.00 -.00 -.00 ·~.90..
"
Slough West Bank,R.M.65.6,S/22N/05W/27/ADC '.,,'
L SEP .20 0'.00 2.00 -.00 -.00 0.00 -.00 ·~.QO
"
,"
Sheep Creek Slough,R.M.66.1,S/22N/04W/30/BAB '.'
".
E JUL •40 0.00 0.00 -.00 -.00 -.00 -.00'.:..-~OO
L JUL 1.90 0.00 -.00 -.00 -.00 -.00 -.00 ..·-:.~,OO
E AUG 3.50 0.00 -.00 -.00 -.00 -.00 -.00
·,';;';QO .
L AUG 3.50 0.00 -.00--.'00 -.00 -.00 .-.00 ·~<OO .
L SEP .60 0.00 0.00 -.00 -.00 0.00 -.00 ':-.00
"
Values·-.00 indicate no sample taken
,.
.....
Appendix Table EB2.1
..'.
....
Catch per unit effort lower Susitna River habitat locations,1980-l981,(Qr',•
juvenile coho.,.." ',:~:.:
SAMPLE
MINNOW TRP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DRFT :'.DIp'~E,T
(CTCH/TRP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/DRP),(CTCH),
~..
..
·~.,OO '
,,:.;~OO
'';':.:00 '
..~.O,O,
,':::~OO "
,,:",.;00'
.....
",.,
:":.00
,"':.00
..-7:.00 "
·....00
"
.'
"
"
Values--.00 indicate no sample taken
. .-:...
..~.
"..
'';''.:.
----l..
---------- - - - - -...._.~,.--....!.
Appendix Table EB2.1 Catch per unit effort lower Susitna River habitat locations,1980':'1981,.fQr ..
juvenile coho.
SAMPLE
MINNOW TRP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DRFT·DIl?'NET
(CTCH/TRP) (CTCH/LNE)(CTCH/24H)(eTCH/HR)(CTCH/TME)(CTCH/HR)(CTCH/DRF)(CTCR)
.,.
"
.'..
:-:~oo
~:~OO,
..".'
,.
'..'
:-:'I.O~
..-~QO :
.-.~O
.~.~OO·
.-~OO
'~::OO .'
~.OO
·~.OO
";'.00 ..
,';"~OO
.:-.00 .
Values=-.00 indicate no sample taken
".
Appendix Table EB2.1
','
,"
Catch per unit effort lower Susit~a River habitat locations,1980-1981,for
juvenile coho.: "
SAMPLE
MINNOW TaP TROT LINE GILL NET HOOK&LINE
(CTCH/TaP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)
BEACH SN ELECTRO GILL DRFT'
(CTCH/THE)(CTCH/HR)(CTCH/DRF)
"DIP NET
(QTciI>"
"
Mainstem I,R.M.84.0,S/24N/05W/l0/DCC ,.
E JUN .20 0.00 .10 -.00 -.00 -.00 -.00
E JUL .20 0.00 0.00 -.00 -.00 -.00 -.00 '
Sunshine Creek,R.M.85.7,S/24N/05W/14/AAB
NOV 1.20 0.00 0.00 -.00,-.00 0.00 -.00
MAR 1.00 0.00 0.00 -.00 -.00 -.00 -.00 "
MAY .30 -.00 0.00 0.00 -.00 -.00 -.00
EJUN 3.60 0.00 20.50 -.00 -.00 -.00 -.00,
E JUL 1.40 0.00 -.00 -.00 -.00 -.00 -.00
L JUL 1.80 0.00 -.00 -.00 -.00 -.00 -.00
E AUG 2.80 0.00 -.00 -.00 -.00 -.00 -.00 ''.
L AUG 1.50 0.00 -.00 -.00 -.00 -.00 -.00
E SEP 2.60 0.00 -.00 -.00 -.00 -.00 -.00
L SEP .20 0.00 0.00 -.00 -.00 -.00 -.00 ,
'..,:
':~:.Oo'
·~.OO
••0.
,'
,'.
'.".
'~··.OO
':-:.00 "
-:,.00
'.0:;4;.00
....~OO
·'~,.OQ
·'-:.()O '
~~:'rOO
·~.OO
',";~OO
:.
Values--.00 indicate no sample taken "
"
....
,.,
..
,0'.-:
- - - - - - - - -_.- - - - - -..•...:--.....
"
Appendix Table EB2.1 Catch per unit effort lower Susitna River habitat locations.1980-1981.f'or'
juvenile coho.'~":
'.:
SAMPLE
·..".'.~.~
MINNOW TBP TROT LINE GILL HET.HOOK&LINE BEACH SN ELECTRO GILL DRFT ...DIP'NET'
(CTCH/TBP)(CTCH/LHE)(CTCH/24H)(CTCH/D)(CTCH/THE)(CTCH/HR)(CTCH/DRF)·.(OTCH)'.. .......'.."",".
·'..~~.
Birch Creek Slough.R.M.88.4.S/25N/05W/25/DCC
E JUN 1.30 0.00 0.00 -.00 -.00
L JUN .20 0.00 -.00 -.00 -.00
E JUL 1.40 0.00 -.00 -.00 -.00
L JUL .50 0.00 -.00 -.00 -.00
E AUG .20 0.00 -.00 -.00 -.00
L AUG .30 0.00 -.00 -.00 -.00
E SEP 5.60 0.00 -.00 -.00 -.00
L SEP 2.60 0.00 -.00 -.00 -.00
-.00
-.00
-.00
-.00
-.00
-.00
-.00
0.00
-.00
-.00
-.00
-.00 :
-.00 '
-.00
-.00 ."
-.00 :.
...
.....00·.'.
·:':'·.06~::
"~\l~O'.
",::-:.00 .'
"":-.~.OO .
':"=~OO'
"~.OO'··
":.:.:.~.()O
Birch Creek.R.M.89.2.S/25N/OSW/25/ABD
JAN .20 0.00 0.00 -.00
FEB .10 0.00 2.00 -.00
MAR .20 -.00 1.00 .....00
EJUN 1.10 0.00 -.00 -.00
L JUN 4.10 0.00 0.00 -.00
E JUL 2.00 0.00 0.00 -.00
L JUL 11.60 0.00 0.00 -.00
E AUG 18.20 0.00 -.00 -.00
L AUG 17 .90 0.00 -.00 -.00
E SEP 10.00 0.00 -.00 -.00
Values=-.00 indicate no sample taken
.,
'"·~..-
"-.00 0.00 -.00 '·"':.00
-.00 -.00 -.00 .:-i.00
-.00 -.00 -.00 ..·....00
-.00 -.00 -.00 ..:'':'''.00 .
-.00 -.00
-.00 .;.."<mi.·
-.00 -.00 -.00 ",,~.()o
-.00 -.00 -.00 "·~.oo·,
-.00 -.00 .-.00 .:.:....•00
-.00 -.00 -.00'.,;..00 .
-.00 75.00 -.00 '.·:.,.'.00.
..:·1'
....
"
Appendix Table EB2.1
·.•.'-
-'.-
Catch per unit effort lower .Susitna River habitat locations,1980-1981,·for··
juvenile coho.':.:
'......,"
SAMPLE
....-
MINNOW TiP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DRFT DIP:'N'ET'.
(CTCH/TiP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/DRF):.'(eTCH)...'.':.-..,-
Cache Creek Slough,R.M.95.5,S/26N/05W/35/ADC
APR 0.00 0.00 1.00 .-.00 -.00 -.00
E JUL .10 0.00 0.00 0.00 -.00 -.00
E SEP .10 0.00 -.00 -.00 -.00
-.00
Cache Creek,R.M.96.0,S/26N/05W/26/DCB
L JUN 1.30 0.00 0.00 -.00 -.00 0.00
EJUL .20 0.00 -.00 -.00 -.00 -.00
L JUL .20 0.00 -.00 -.00 -.00 -.00
E AUG .20 0.00 -.00 -.00 -.00 -.00
L AUG .70 0.00 -.00 -.00 -.00 -.00
E SEP .10 0.00 -.00 -.00 -.00 -.00
L SEP .20 0.00 -.00 -.00 -.00 -.00
-.00
-.00
-.00 ,
-.00 .'
-.00
-.00
-.00
-.00'
-.00
-.00
.......
:~~OO
·~.OQ.··
.·-.QO
,\.'
.....;.
',,,,,.0'0.'
'.00;:',.00
:'\".•00 .
-".00.'.
'-.00.
'-.00
~'.OO
"
"Values--.00 indicate no sample taken
..:':
;
-...~.
- - - - - - - - - - - - - - - -.'..:.:--..'
Appendix Table EB2.2 Catch per unit effort lower Susitna River habitat locations,1980-1981,·for:.
0+coho.".
:...}'.-.'
SAMPLE
MINNOW TRP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DRFT·DIP :'NET
(CTCH/TRP)(CTCH/tHE)(CTCH/24H)(CTCH/Hi)(CTCH/THE)(CTCH/HR)(CTCH/DRF).:(C1J;Cilj·.
'.
Whiskers Creek Slough,R.M.101.2,S/26N/05W/03/ADB
L JUN .10 0.00 0.00 -.00 -.00 -.00 0.00
E JUL •10 0.00 0.00 -.00 -.00 -.00 -.00
L AUG .20 0.00 -.00 -.00 -.00 -.00 -.00
Whiskers Creek,R.M.101.4,S/26N/05W/03/AAC
MAR 2.40 0.00 0.00 0.00 -.00 -.00 -.00:,
E JUN .50 0.00 0.00 0.00 -.00 -.00 -.00
L JON 2.40 0.00 0.00 0.00 -.00 -.00 -.00'.
E JUL 2.60 0.00 -.00 0.00 -.00 -.00 -.00 .
L JUL 2.90 0.00 -.00 -.00 ...00 -.00 -.00
"E AUG 3.00 0.00 -.00 -.00 -.00 ~.OO -.00 .'
7.00 0.00 -.00 -.00 -.00 -.00 -.00
..L AUG
E SEP 1.70 0.00 -.00 -.00 -.00 -.00 -.00
L SEP 1.80 0.00 -.00 0.00 -.00 -.00 -.00 .
.'..'."..'.
•'"0 •. '00'•-:-.:_.0.
·'-.OQ .
.~,OO··
,.
"
';';".00.
:':".00,
"::..00.'
.~.OO·.:;
·....:..00·
·~··OO ....'
·.~OO ,"
,,...00 "..'..
.~.OO
Values--.00 indicate no sample taken ,..
~"..
.-".
''':-:I
"..
..'
Appendix Table EB2.2
....
Catch per unit effort lower Susitna River habitat locations,1980-1981,f9~.
0+coho...'..'
MINNOW TaP TROT LIRE GILL HET ROOlC&LIRE BEACH SR ELECTRO GILL DRFT·.
SAMPLE (CTCH/TaP)(CTCH/LHE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/DR!.)·:
,
Slough 6A,R.M.112.3,S/28R/05W/13/CAC ..
MAR 8.00 0.00 -.00 -.00 -.00 -.00 -.00
E JUL .30 0.00 .10 -.00 -.00 -.00 -.00.
L JUL .20 0.00 0.00 -.00 -.00 -.00 -.00 .'.~....
E AUG 1.40 0.00 -.00 -.00 -.00 -.00
-.00'.
L AUG 4.70 0.00 1.00 -.00 4.00 -.00 -.00
E SEP 4.20 0.00 -.00 -.00 -.00 0.00 .-.00
L SEP 4.30 0.00 0.00 -.00 -.00 -.00 -.00
Lane Creek,R.M.113.6,S/28N/05W/12/ADD
E JUL .10 0.00 0.00 -.00 -.00 -.00 -.00 .
L JUL .60 0.00 -.00 -.00 -.00 -.00 -.00
E AUG .20 0.00 -.00 -.00 -.00 -.00 -.00
L AUG .10 0.00 -.00 ,-.00 0.00 -.00 -.00 .:',..
E SEP .20 0.00 -.00 -.00 -.00 0.00 -.00 .
L SEP •40 0.00 -.00 -.00 -.00 -.00 -.00'....
DIP .)lET '
(~~CH)-:.
.,
'.
.....
·~,.:OO:
..;...00 "
:~.OO,,,~·:OO'.'..:..,00 ...
.....i.~00:·
,'':'.00
.:"
:..·00':'.
.'0"
.....90·,
,~'.OO··
-.·00 .
.,':-:..Op·:
'.,:.QO·....
Values=-.00 indicate no sample taken
"t
.'
.'
,
---------------·._....-..:.
Appendix Table EB2.2
.,'.
Catch per unit effort lower Susitna River habitat locations.1980-1981,fo''r:''~
0+coho..:.'..
• t ..
SAMPLE
MINNOW TRP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DRFT;DIP NET',
(eTCH/TRP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/TME)(CTCB/HR)(CTCH/DRF)'.(CTplp .
,,
'.Mainstem 2.R.M.114.4.S/28N/04W/06/CAB
E JUL .10 0.00 ·0.00 -.00 -.00 -.00
Slough SA,R.M.125.3,S/30N/03W/30/BCD
.MAR .50 0.00 0.00 -.00 0.00 0.00
APR .20 -.00 -.00 -.00 -.00 -.00
L JUL .40 0.00 0.00 0.00 -.00 -.00
E AUG .10 0.00 -.00 -.00 -.00 -.00
L AUG 2.50 0.00 -.00 0.00 -.00 -.00
L,SEP .50 0.00 0.00 0.00 -.00 -.00
Fourth of July Creek,R.M.131.1.S/30N/03W/03/DAC
E JUL .20 0.00 0.00 0.00 0.00 -.00
L JUL .40 0.00 0.00 0.00 -.00 -.00
E AUG 2.80 0.00 -.00 0.00 -.00 -.00
L AUG 2.50 0.00 -.00 0.00 -.00 -.00
E SEP 2.60 0.00 -.00 0.00 -.00 -.00
L SEP .60 0.00 -.00 -.00 -.00 -.00
-.00 .
",
.'~
-.00:.':
-.00 '.
-.00 "
-.00 ..',.
-.00
-.00 ."
-.00 .
-.00 .'
-.00 "
-.00".
-.00 '.'
-.00
,
-.-.,00'
.•t ,.•
·,
.~~OO
.:-:-..00
.,,:.00 .
·:-....00··
:~..O().'...
';-:.00
.':
.~'''OO
.·';~.OO ",
.~~OO'
'.-•.00,.
·-.QO '"
.'-:-.00
Values·-.00 indicate no sample taken
"
...
Appendix Table EB2.2
,..
\:.'
Catch per unit effort lower Susitna River habitat locations,1980-1981,fQt'..'
0+coho..,·.~...
SAMPLE
MINNOW TRP TROT LINE GILL NET HOOIC&LINE .BEACH SN ELECTRO
(CTCH/TRP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)
GILL DRFT ';DI P 'NiT '.'
(CTCH/DaF,)',(eTCH).
•'.eO
Slough 10,R.M.133.8,S/31N/03W/36/AAC
FEB .20 0.00 -.00 -.00 -.00 -.00 -.00
MAR .30 -.00 -.00 -.00 -.00 -.00 -.00
L JUL .80 0.00 0.00 0.00 0.00 -.00 -.00
E AUG .20 0.00 0.00 -.00 -.00 -.00 -.00
L AUG 1.40 0.00 -.00 -.00 -.00 -.00 -.00
E SEP .20 0.00 -.00 -.00 -.00 -.00 0.00 . "
. L SEP .10 0.00 0.00 -.00 -.00 -.00 -.00 .
Slough 11,R.M.135.3,S/31N/02W/19/DDD '"
FEB .10 -.00 -.00 -.00 -.00 -.00 -.00
APR .30 -.00 -.00 -.00 0.00 -.00 -.00 '.,:'
E AUG .10 0.00 0.00 -.00 0.00 -.00 -.00.'.
L AUG .10 0.00 -.00 -.00 -.00 -.00 -.00'.'
Values--.00 indicate no sample taken
.'
"..':
0_.'.'
·......90
,-:~OO
'::'.•00 .
·";'.'.00'-:
.-.00
·;....QO:.,..
'-:-.00
.....
.'~
·":'.•00
..~.·OO ..
':f,~OO . :
··:......0-0·_'
"
·~..
,....
..
"
....
.
.,'
-
- - - - - - - -_.- - - - - --'.......-'.'
Appendix Table EB2.2 Catch per unit effort lower Susitna River habitat locations.1980-1981.fOf~
0+coho.''.,:
;.....
.'.;,":
SAMPLE
MINNOW TRP'TROT LINE GILL HET HOOK&LINE BEACH SN ELECTRO GILL DRFT'DIP :NET
(CTCH/TRP)(CTCH/LHE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/~RF'>'..:(~~CB)
....
'.'
Mainstem Susitna ~Inside Bend.R.M.136.9.S/31N/02W/17/CDA
E AUG .10 0.00 0.00 -.00 -.00 -.00
,,
-.00 "
;.'........
''':,'00:
".'..
Indian River.R.M.'138.6.S/31N/02W/09/CDA
E SEP 3.10 0.00 .0.00 0.00 -.00 -.00 O~OO '':
L SEP .10 0.00 0.00 -.00 -.00 0.00 -.00
Slough 20.R.M.140.1.S/31N/02W/11/BBC
",
FEB .10 -.00 -.00 -.00 -.00 -.00 -.00
MAR..20 -.00 -.00 -.00 -.00 -.00 -.00"
APR •30 -.00 -.00 -.00 -.00 -.00 -.00
L JUL .20 0.00 0.00 -.00 0.00 -.00 -.ob .~.
E AUG .10 0.00 -.00 -.00 -.00 -.00 -.00
E SEP 3.10 0.00 -.00 -.00 -.00 -.00 -.00
L SEP .50 0.00 -.00 -.00 -.00 -.00 -.00 "
Values=-.00 indicate no sample taken
,',
"~"OO"'.'...
",:~'..~O '
;,
.'
:~..OO
'+.00'
.:-;.00 .
,-"'0'0'. '
,.'
,~.OO '
;.~.OO .
',,~;'Qq "
,';
...
..''.
Catch per unit effort lower Susitna River habitat locations,19~~19~1,for"
1+coho.
Appendix Table EB2.3
SAMPLE
.'.,',",
MINNOW TRP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DRFT "DI~:~E~
(CTCH/TRP)(CTCH/LNE)(CTCH/24H)(CTCU/ua)(CTCH/TME)(CTCH/HR)(CTCH/DRF)~(~TC~)
"
,
,.•..
Whiskers Creek Slough,R.M.101.2,S/26N/05W/03/ADB
"....,.'
",'.''..~..
EJUN .20 0.00 .50 -.00 -.00 -.00 -.00 ':",,~'OO
L JUN .20 0.00 0.00 -.00 -.00 -.00 0.00 :':.':'.DO
L AUG .10 0.00 0.00 -.00 -.00 -.00 -.00 ,~..OO
E SEP .10 0.00 -.00 0.00 -.00 -.00
-.00 ' ,',';',,'00,
L SEP .10 0.00 0.00 -.00 -.00 -.00 -.00 ,,:'~;~O
"
Whiskers Creek,R.M.101.4,S/26N/05W/03/AAC "
MAR .80 0.00 0.00 -.00 -.00 -.00,-.00
E JUN .40 0.00 0.00 0.00 -.00 -.00 -.00
L JUN .50 0.00 0.00 0.00 -.00 -.00 -.00'
E JUL .60 0.00 -.00 0.00 -.00 -.00 -.00
L JUL .20 0.00 -.00 -.00 -.00 -.00 -.00
E AUG .30 0.00 -.00 -.00 -.00 -.00 -.00":
L AUG .10 0.00 -.00 -.00 -.00 -.00 -.O~
E SEP .10 0.00 -.00 -.00 -.00 -.00 -.00 '
"
oi.::.'OO "
~.i)O ','
,':':.00:'"
'';''.,00'
!"..OO,
:,~,:.~O ,
,.~.OO,
'~.•OO,:
.~.
.,.:
.";
Values~-.00 indicate no sample taken
•",I'
,"
".....
0,..,•....
---- - - --- --- - --...'..,..._.-......
Appendix Table EB2.3 Catcb per unit effort lower Susitna River babitat locations J 1980-1981 J fo.r',
1+cobo.',:.,:
DIP:tfET ,
<QT.c.H)'..
•~0'
".
,~'.OO '
.-.00
;,;.Of),'..!'-';"'f.00 .
,":~'~p'O
,·h"O~··,
••0 .'·'.
.....'
.;"_.00
','·:.
·.•..;
"
··*';.00
Values·-.00 indicate no sample taken
.'.
...
"
......:.;.
!
.''.
'.'....
Appendix Table EB2.3
.:-
.,"
"
Catch per unit effort lower Susitna liver habitat locations,1980-1981,for
1+coho.;.',..
,.111 •
SAMPLE
MINNOW TiP TIOT LINE GILL NET HOOK&LINE
(CTCH/TiP)(CTCH/LNE)(CTCH/24H)(CTCH/HI)
BEACH Sft ELECTIO
(CTCH/THE)(CTCH/HI)
GILL DUT '.DIf .BET
(CTCH/DIl ).......(C'tCH).
.'~'.~,:.
'.~.
'.."',"
'"..:'..00:·..'..
...;;".:~Q
,'.~.OO,
-~OO
~'...:"..
,.,
.'
7:'.00 '.
'..,;.;,00
.:'::..;00
"
.~"
.'i.,...:
Values--.00 indicate no sample taken ,.~:
','.;.
..'
.'.'
"
"
.."..,'
.;..
",
.......
,.'
.,
"
_____•....','iIiI.,'_
".
Appendix Table EB3 Catch per unit effort lower Susitna River habitat locations.1980-198\t for ,','..
0+Pink.•', " ,
::.:.
",
SAMPLE
'..
MINNOW TRP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DRFT ','DIP NET '
(CTCH/TRP)(CTCH/LNE)(CTCH/24B)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/DRF):(GTc'H),,,'
Fourth of July Creek,R.M.131.1,S/30N/03W/03/DAC
.....
,"
•••0;to •
Of...
."
L JUN 0.00 0.00 0.00 -.00 4.00 -.00 -.00
..
•T'~OO''..."",-
.r"..."
Slough 10,R.M.133.8,S/31N/03W/36/AAC
L JUN 0.00 0.00 0.00 0.00 3.00 -.00 -.00 ':';.:.~QP,
"·0
Slough II,R.M.135.3,S/31N/02W/19/DDD
,'
, ,
'..
APR 0.00 0.00 0.00 0.00 2.00 -.00 0.00",0.00',
..~"
','
Values=-.00 indicate no sample taken
,"'.'
"
".!
.:to
.'.....
"
'''-:... .
"
" '
Catch per unit effort lower Susitna River habitat locations,1980-19(U';for.:~··,
0+Chum.:"...'.'.
Appendix Table EB4
,"
',.
':'.
SAMPLE
MINNOW TRP TROT LINE GILL NET HOOIC&LINE BEACH SN ELECTRO GILL DRFT .'DIP.::NET .
(CTCH/TRP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/DRF).COiC;:HL
:."
.~',:..'
Slough II,R.M.135.3,S/31N/02W/19/DDD ,.
"
L JUN 0.00 0.00 -.00 -.00 1600.00 -.00 -.00 ,';.',0.:00
.:;.':,,:,
Slough 20,R.M.140.1,S/31N/02W/ll/BBC
E JUL 0.00 0.00 0.00 -.00 13.00 -.00 -.00 .
,.;
:'.
:.":
"'::~'OO
,,
Values·-.00 indicate no sample taken
,~--·--··7·-.-----'~
,',
','."".
;.:
~"'~. .
.:'.'
\:..
"
'.-:.....
,"
,,
--~-
- - - - - - - - - - - - - - --'.....:-/-•• "I
Appendix Table EB5 Catch per unit effort lower Susitna River habitat locations,1980-1981,fo.t:~:o
0+Sockeye.'.:.
SAMPLE
MINNOW TRP TROT LINE GILL NET HOOK&LINE BEACH SN ELECTRO GILL DRFT ;.DI~':NET'
(CTCH/TRP)(CTCH/LNE)(CTCH/24H)(CTCH/HR)(CTCH/THE)(CTCH/HR)(CTCH/DU)':..(C!fQH)
..~";;,..
".
Slough II,R.M.135.3,S/31N/02W/19/DDD , 0 ..'
APR 0.00 -.00 -.00 -.00 1.00 -.00 -.00.,,;',.;d.oO:
,...",
Values=-.00 indicate no sample taken
.,
..
."..
".,..
,.
: 0
.','.':..
"
....:'I...
....
•
..:"
.'
0',
.~~.".
'.'.