fr
I
i'*,
i
lo
c/rv*V4c(oe
3
o
.
O
andstraying
straying of
surveysand
of
Spawning
salmonsurveys
Spawning salmon
p
ri va te h
om Yaquina
a tcher ycoho
private
hatchery
coho salmon
salmon fr
from
Yaquina
Oregon,1982.
1982.
of Oregon,
Bay in
in coastal
coastal watersheds
watershedsof
Bay
l.
o
0
M . McGie
M cGie
Alan
Alan M.
4
o
0
o
0
F i s h and
a n dWildlife
l,lildlife
Oregon Department
of
Department
o f Fish
0regon
F i s hDivision
Division
Fish
97208
PortI and,Oregon
0regon97208
Portland,
o
1983
September 1983
September
o
o
CONTENTS
Page
o
o
INTRODUCTION .........................................................
I
METHODS .............................................................
2
Spawning Fish Surveys .....
.......................... . ...........
Hatchery Fish Strays
...........................
Scaleanalysis
Spawning Stock Size
..............................
Straying Rate ............
2
RESULTS ................. . .. ..... . ................... . ...............
..............
28
28
........ . ....... . .
32
3?
.................. . . . . . . . . . . . . . . . . .
34
34
r(D
Escapementintolenmilelakes .......... .. .....
ChumSalmon. * . . . . ...... . . . . . . . . . . ......................... . . .
...... ....*....*..e
Tillamook Bay
..............................
. ........ .... . ...
Peak counts..... .......
Trap counts .........
......... . . . . . .......... . . . . . .
Nestucca River. . . . . . . . . . . .
Age-length composition. . . .
Hatchery Coho Salmon Strays . . . .
Coded-wire-tag recoveries
Distribution.
0
o
. . . . . . .
........ * . . . . . . . . . . . . . .
. . . . . . .
...... . . . . . . . . * . . . . . . . .
. . . . . . . .........
. . . . . . . . . . . . .
Timing...... .
. .
............ . ..... . . . . . . . . . . .
........................ . ..... . . . . . .
. . . . . . .
................. . ....... .
LincolnDistrictpublichatcheries ............
AbundanceinYaguinaRiver ..................
Straying rate .....
0 ISCUSSION .................
o
REFERENCES......
APPENDICES.
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . .
9
9
. . . . . . . . .
Fa1 Chinook Salmon...................... ...............
Peak counts
. . . . . . ......... . . . .
Coho Salmon. . . . . . . . . . . ...........
.. ...........
Peak counts........ ......
. . . . . ........ . . ........
Total escapement (AUC) . . . ......
Hatchery-influenced versus wild streams. ...... .. .........
Scal e anal 's i s
2
6
6
7
7
8
I
I9
9
9
9
9
9
9
9
9
13
13
15
15
16
16
16
t6
16
16
16
16
16
16
19
19
22
22
23
23
23
23
24
24
25
25
26
26
26
26
27
27
28
28
o
o
0
2
......... .
o
0
o
1.
o
INTRODUCTION
INTRODUCTION
o
streamssince
since 1950
1950to
assess
coastal streams
in coastal
Spawning
to assess
salmonhave
beencounted
countedin
Spawningsalmon
have been
pr im ar ily established
establ i s hed
Thesurveys
sur veyswere
wer eprimarily
n a tu ra l spawning
t h e status
sp a w n i ng
stocks. The
s t a t u s of
o f natural
the
stocks
o
fisheries operating
net fisheries
operating
to
escapement of
of wild
wild salmon
salmon past
past cormercial
comercial net
to determine
determineescapement
in
net fisheries
fisher ies were
wer eclosed
closedin
When
hencommercial
cor m er cialnet
i n sseveral
e v e r a l large
l a rg e river
ri ve r systems
syste ms. W
in
troll
trendsas
asocean
oceantroll
escapement
determineescapement
retained to
to determine
1957,
trends
the surveys
wereretained
1957, the
surveyswere
i
o
fi sh e ri e s developed
d e ve l o p e d.
a n d sport
s p o r t fisheries
and
programhas
efforts
through successive
successiveefforts
has evolved
evolvedthrough
The
The spawning
survey program
spawningsalmon
salmonsurvey
data
conso'lidatedata
years--primarily to
surveys, consolidate
reducethe
numberof
of surveys,
to reduce
the number
over
the years--primarily
over the
pr ovide meaningful
tr end data
at
data at
neaningfultrend
andstil1
still provide
from
f r o m aa variety
v ari e ty of
d ra i n a g e s,and
o f drainages,
nn trends
trndc was
primary infnrmatinn
was
th nrimarv
information on
Frnm
ico tn
the
to 1974
tg74,
minimal
exnns
From1950
minimal expense.
p
I-
( Ber r y1975)
followi ng
In 1976,
1976,following
1975) . In
th e Fish
0r egon(Berry
b y the
F i sh Commission
C o rmi ssion
of Oregon
obtained
of
o
b t a i n e dby
in
age nc yin
into aa unified
unified agency
Conmission
F i sh Commission
blildlife Commission
merger
into
th e Fish
C o rmi ssi o nand
and Wildlife
m e r g e rof
o f the
( Cunm ings
1977) .
p ro g ra mwas
andstandardized
r eviewedand
standar dized
1975,
(Cummings
1977)
i n te n si v ely reviewed
t h e program
w a sintensively
1 9 7 5 , the
and l{i'ldlife
Departmentof
of Fish
Escapement
indexes
by the 0regon
Oregon Department
Fish and
Wildlife
indexesdeveloped
developedby
Escapement
between
providing aa breadth
coveragebetween
of coverage
breadth of
were derived
from limited
limited surveys
surveys providing
derived from
were
single
within any
any single
coveragewithin
in-depth coverage
coastal
expense of
the expense
of in-depth
drainagesat the
coastal drainages
d r a in a g e .
drainage
(1 980)evaluated
t for
sur veyingeffor
Beidler
Nickelson
evaluated the
the surveying
effort
for coh
cohoo
B
e i dl e r and
a n dN
i cke l so n(1980)
(1) the
be
index be
the standard
standardindex
They recommended
that
prior to
that (1)
recormended
to 1981
1981. They
salmon prior
sa'lmon
(2) the
peak count
replaced
(areas), (2)
be replaced
the peak
expanded to
to at least 40
40 survey
survey units (areas),
count be
expanded
of
index of
as an
an index
unit as
the index
index unit
in the
with
numberof
spawnersin
the number
of spawners
of the
estimatesof
with estimates
by
influencedby
for streams
str eam sinfluenced
(3 ) separate
be established
establishedfor
escapement,
be
a
se p a ra teindexes
' indexes
e
s c a p e m e n and
t,n d (3)
fish.
hatchery fish
hatchery
1981for
for coho
coho
in 1981
first adopted
The
were
adoptedin
werefirst
recormendations
The recommendations
for fall
fall
in surveys
surveysfor
preventedaa similar
improvement
in
similar improvement
Lack of funds
funds prevented
salmon. Lack
salmon
water sheds.
i n coastal
co astal watersheds
an d chum
ch u msalmon
sa l mo nin
cchinook
h i n o o kand
-1-1-
I
a
Distr ict streams
str eam sand
and
conductedin
in Lincoln
Lincoln District
Ad
d i ti o n a l sampling
w a sconducted
Additional
sa mp l i n gwas
)
pr ivate hatcher
om 0r
eg on
cohosalmon
salm onfr
of private
h a t c h e r i esto
to document
hatcheries
hatchery ycoho
from
Oregon
d o cu me nstraying
stra
t yi ng of
par tially funded
pr ogr am
(0 A F )facility
fun ded
Bay. The
Theprogram
waspartially
was
a t Yaquina
YaquinaBay.
A q u a - F o o d s'
fa ci l i ty at
Aqua-Foods'
(OAF)
totaling
funds totaling
q u a -Foods
in state
and $3,565
state funds
fro m 0
re g o nA
with
Oregon
Aqua-Foods
and
w
i t h $9,937
$3,565in
$ 9 , 9 3 7from
t
fisher ies
by fisheries
p ro g ra mwas
r esponseto
to concerns
concer nsby
in response
The
h e program
w a sconducted
co n ductedin
$12,937.
$12,937. T
possible long-term
inter br eed' ing
p u b l i c on
of interbreeding
th e possible
long- ter meffects
effects of
m
a n a g e rs
a n d the
th e public
o n the
managers
and
distr ict streams.
str eam s.
in district
h a tch e rystocks
sto cksin
wild
a n dstray
stra y hatchery
w i ' l d and
o
METHODS
METHODS
o
F i sh Surveys
S u rve ys
S
p a w n i ng
Spawning
Fish
index areas
ar eas
sur veyingindex
r esponsjblefor
District
fisheries
biologists
i o l o gists v{
were
er eresponsible
for surveying
D
i s tri ct fi
sh e ri e s b
distr icts.
th e i r respective
re sp e cti vedistricts.
i n their
e
s t a b l i s h e din
established
o
by temporary
tem por ar y
assistedby
They
Theywere
wer eassisted
Fall chinook
chinook
for coho
salmon. Fall
cohosalmon.
p e r s o n n elhired
i n tensivesurveys
sur veysfor
h i re d to
to conduct
personnel
co n d u ctintensive
Coho salmon
1983. Coho
salmon
17 January
January1983.
1982and
and17
salmon were
were counted
between88 October
0ctober 1982
salmon
countedbetween
were
Chum
salmon
1983. Chum
salmonwere
February1983.
14 February
1982and
and 14
were
October 1982
15 October
between15
were counted
countedbetween
o
index
Pre-establishedindex
1983. Pre-established
January1983.
1982and
counted
1982
November
and33 January
between1I November
countedbetween
of
counts of
to obtain
obtain counts
seasonto
the spawning
during the
spawning
areas v{ere
were repeatedly
season
repeatedly sampled
sampledduring
areas
jacks (age
(age 2)
from adults
adults
kept separate
separatefrom
2) were
were kept
Countsof jacks
deadsalmon.
live
live and
and dead
salmon. Counts
o
( > age
3).
(>
a g e3).
totaling
streams, totaling
included 48
salmonincluded
The standard
for coho
coho salmon
48 streams,
area for
index area
The
standardindex
(T a b l e1).
m i l e s (Table
1 ).
53.0
5 3 . 0 miles
o
gr oupsbased
bas ed
two groups
into two
str atified into
The
wer estratified
T h e index
i n dex areas
ar easwere
groupof
Onegroup
of
the counts.
counts. One
potential influence
fish on
on the
hatcheryfish
on
of hatchery
influence of
the potential
on the
influences;
hatchery influences;
light to
surveys contained
contained streams
streams thought
thought to
to have
have light
to heavy
heavy hatchery
surveys
Total
primarily contained
wild spawners.
spawners. Total
containedwild
groupof
of streams
whereas,
streamsprimarily
the second
secondgroup
whereas,the
o
o
wild
and
andwild
for hatchery-influenced
hatcher y- influenced
m iles for
24.2 miles
2 8 .8 and
a n d24.2
distances
ista n ce swere
w e re28.8
ssurvey
u r v e yd
-2-2-
o
i n Oregon
coastal
s a l m o nin
0 r e g o ncoastal
f o r coho
c o h osalmon
u r v e y sfor
s p a w n i n gssurveys
1 . Standard
S t a n d a r dspawning
T a b l e1.
Table
units.
f i s h spawning
s p a w n i n units.
g
w i l d fish
hatchery-influenced
adn dwild
a t c h e r y - i n f l u e n c eand
into h
s t r a t i f i e d into
w a t e r s h e dstratified
watersheds
R
i v e r system
system
River
a
Hatchery-infI uencedsurveys
surveys
Hatchery-influenced
R
N e c a n i c uR.
m.
Necanicum
R.
K
i l c h i s R.
Kilchis
t { i l s o n R.
R.
Wilson
o
T i I l a m o o R.
kR .
Tillamook
N e s t u c cR.
aR .
Nestucca
R.
S i l e t z R.
Siletz
Y a q u i nR.
aR .
Yaquina
( F i v eRivers)
Rivers)
A l s e aR.
R . (Five
Alsea
o
o
M il e a g e
Mileage
Index
Index stream
stream
R.
S m i t hR.
Smith
Coos
Bay
Coos Bay
R.
M
illicoma
Millicoma
R.
F k . Coos
r.
South
S o u t hFk.
C o o sr.
R.
Coquille
C
o q uI il e R.
Fork
North
North Fork
Upper
Upper Necanicum
Necanicum
Downs
Cr.
SamsDowns
Sams
Cr.
a
Cedar Cr.
Cr. a
Cedar
Fork
L a k eFork
D e v i l ' s Lake
Upper
U
p p e rDevil's
Cr.
Simmons
SirmonsCr.
r . aa
C
l e a rC
Clear
Cr.
B
e a rC r .
BearCr
Cr.
Gravel
G
r a v e lCr.
July Cr.
Cr.
of July
Fourth
Fourth of
Salmon
S a l m o Cr.
nC r .
a q u i n aR
a
Upper
Yaquina
R.. a
U p p e rY
Lobster
L o b s t e rCr.
' C r .aa
Cr.
Cherry
CherryCr.
Cr.
l ' l i l s o nCr.
Wilson
Cr.
Buck
B u c kCr.
r. a
Beaver
Cr.
a
B
e a v e rC
Fork
S o u t hFork
Little
L i t t l e South
C r . aa
Larson
L a r s o nCr.
Cr.
Marlow
M a r l o wCr.
Cr.
Daniels
D a n i e l sCr.
1.5
1.5
1.0
1.0
?.9
2.9
0.5
0.5
Fork
North
North Fork
Cr.
Cherry
CherryCr.
A l d e r Cr
Cr.
Alder
1.0
1.0
1.8
1.8
a
Cr.
Elk
E l k Cr.
R.
Itehalem
Nehalem
R.
R
N e s t u c cR.
a.
Little
L
i t t l e Nestucca
0 r i f t Cr.
Cr.
Drift
R . , mainstem
mainstem
Siuslaw
S i u s l a wR.,
Forlr
North
l{orth Fork
Lake
Cr.
L a k eCr.
Umpqua
tlmpquaRR.
o
I
1.0
1.0
0.8
0.8
0.6
0.6
2.0
2.0
1.3
1.3
0.8
0.8
1
.3
1.3
3.5
3.5
1.5
1.5
1
.0
1.0
1.3
1.3
1.0
1.0
0.8
0.8
?8.8
28.8
f i s h surveys
surveys
lWild
{ i l d fish
Beaver
B e a v e Cr.
rC r .
R.
Yachats
Y a c h a t sR.
a
0.8
08
1.0
10
Subtotal
S u b t oat I
o
0.6
0.6
0.8
0.8
Fork
South
SouthFork
Cow
Cr.
CowCr.
R.
C o q uI il e R.
Coquille
Fork
East
East Fork
Fork
M
Middle
i d d l eFork
Fork
South
SouthFork
Fork
West
WestFork
Cr.
l { . F . Cronin
C r o n i nCr.
N.F.
Humbug
Cr.
W.
Cr.
l{. Humbug
Cr.
Hamilton
H a mI it o n Cr.
RanchCr.
Cr.
Oak
OakRanch
N.F.
Cr.
I'lolf C
r . ac
N . F . Wolf
B
e a rCr.
Cr.
Bear
Horse
Cr.
H o r s eCr.
Nettle
Cr.
t{ett le Cr.
E e a v e Cr.
rC r .
N . F . Beaver
N.F.
Cr.
lWilliamson
{ i l l i a m s o nCr.
Fork
School Fork
School
Cr.
Dogwood Cr.
Dogwood
Doe Cr.
Ooe
Cr.
Billie
Cr.
B
i l l i e Cr.
Rogers
RogersCr.
Cr.
Cr.
iMisery
l i s e r y Cr.
4
Panther Cr. a
Panther
c
Cr. a
Schofield
S
c h o f i e l dCr
0.5
0.5
0.5
0.5
1.0
1.0
1.0
1.0
1.0
1.0
1.1
i.i
0.8
0.8
1.0
1.0
0.8
0.8
1.0
1.0
1.3
1.3
0.5
0.5
1.0
1.0
0.5
0.5
1.3
1.3
1.3
1.3
0.8
0.8
0.8
0.8
2 .00
2
DeanCr
DeanCr.
1
.5
15
Myrtle Cr.
Cr.
North
North Myrtle
Quines
Cr.
Q u i n e sCr.
1.0
1.0
1.0
1.0
C r . aa
Steel
S t e e l Cr
Slater
S l a t e rCr
Cr.
Salmon
Cr.
SalnonCr.
1 .00
i
0
0 .55
1.0
1.0
i
S
u b t oat l
Subtotal
24 2
24.2
T o t a l Index
Index
Total
53
5 3 .00
l,ndea
qgtunda"d
0D?llt.ndez
@nprtsingthethe
astandard apawnz.ng
fi.sfrzeunteu
aurvey stfe@ne
8treo)a formerly
OVFW
ep&rting lnsn
fornerlucomprsei.ng
a
r e a , 71950-80
950-80.
area1
o
-3-3-
I
r e sp e cti ve l y. The
index area
ar ea for
for fall
fall chinook
chinooksalmon
salmon
sta ndar dindex
sstocks,
t o c k s , respectively
T h e standard
1 2 streams
1 1 0. 0miles
miles.
contained
t o t a l i n g 11
c o n t a i n e d12
s t r e a m stotaling
peakfish/mile
andaverage
fish/m i l e
The
wasrevised
r evised in
in 1982
1982and
aver agepeak
T h e chum
a rea was
ch u msalmon
i n d e x area
sa l mo nindex
ookBay
were
recalculated
back
1948 when
when counts
counts began
began in
Tillamook
Bay
ca l cu l a te db
in Tillam
ere re
a ck to 1948
ccounts
o u n t sw
thr ee streams
Prior
str eam stotaling
totaling
P ri o r to 1960,
the index
ar ea contained
containedthree
1 9 6 0 , the
index area
tributaries
t r i b u t a r i e s.
str eam stotaling
totaling
the index
ar ea contained
containedsix
six streams
miles
1 . 77 m
i l e s. From
F ro m1960
1 9 6 0to 1977,
1 9 7 7,the
index area
i n 1960
after
K i ' l c h i sRiver,
R i v e r , index
w a seliminated
e l i m i n a t e din
1 9 6 0after
i n d e xwas
4
4 .00 miles
m i l e s . The
T h eClear
C l e a r Creek,
C r e e k ,Kilchis
l a ced in
astically
was
placed
stream
counts dr
drastically
in the str
eamand
and counts
a cculvert
ulvert w
a s improperly
i mp ro p e rl yp
to 33.7
miles when
tr ap
7 miles
wasreduced
r educedto
whenaa trap
the mileage
declined
d e c l i n e d . From
F ro rn1978
1 9 7 8to 1981,
1 9 8 1 ,the
mileagewas
was
the
e l i m i n a t e d00 .33 mile
m i l e of
o f the
K i l c h i s River,
R i v e r , which
w h i c heliminated
w a sconstructed
c o n s t r u c t e din
i n Coal
C o a lCreek,
C r e e k ,Kilchis
0
index
i n d e xunit
unit.
re-established
In
1982,
Clear
Creek,
Kilchis
i l c h i s River,
R i v e r , index
i n d e xrwas
r a sre-established
r e e k ,K
In 1
9 8 2 ,tthe
he C
learC
of chum
chumsalmon
salmon
after
culvert that
that formerly impeded
movement of
impededthe upstream
upstrean movement
after the culvert
bridge.
was
arid
replaced with aa bridge
removed
rrasremoved
and replaced
The
for chum
The current
index area
area for
chum
current index
(se ve nindex
ookBay
Bay water
s hed.
in the
salmon
3 mi
miles
the Tillam
Tillamook
watershed
index streams)
str eams)in
o ta l s 4 .3
l e s (seven
s a l m o nttotals
in Clear
Clear Creek,
Creek,
for chum
salmonin
A
chumsalmon
A new
index area
trasestablished
established for
newstandard
standardindex
area was
since 1950
1950.
available since
Nestucca
River,
where
historical
counts wer
weree available
ve r, w
N
e s t u c c aRi
h e reh
i sto ri cal counts
0
fr om the
the
p e a kfish/mile
wascalculated
calculated from
Average
the index
index units
units was
Av
e ra g epeak
fi sh /mi l e in
i n the
following
f o l l o w i n grelationship
rel ationship:
n
n
t
z
(1)
(1)
F/M
F/t4==
i == 1 cci .
n
n m i mj
1
where,
where,
I
i , = =1
l
i..
0
per mile
mile
fish per
F/M
F/ltl == average
averagefish
peak count
rl
stream i
index stream
count in index
c; == peak
index stream
streami
in index
m
m; == mileage
mileagesurveyed
surveyedin
0
surveyed
= number
n =
numberof
of streams
streamssurveyed
- 4-4-
o
jacksand
p e a kfish/mile
for jacks
adults.
Se p a r a t eaverage
wer emade
m ade
a ve ra g epeak
fi sh /mi l e estimates
estimateswere
andadults.
Separate
for
peak counts
previous years
This constrasts
frorn the
the
counts were
were obtained
to previous
obtained from
constrasts to
This
years where
where peak
j a cks and
index units
in the
units.
a dults observed
obser vedin
the index
c o m b i n e number
dn u mb eof
a n d adults
combined
or f jacks
the index
index area
area was
rrasestimated
estimated
The
total number
numberof
coho salmon
salmonin
in the
The total
of spawning
spawningcoho
( Beidlerand
(A UC)techniques
andNickelson
Nickelson
1980),
techniques
using
(Beidler
1980),
u s i n g area-under-the
a r e a -u n d e r-thcurve
ecu rve(AUC)
the following
fol' lowing
index was
der ived from
fr om the
T
This
h i s index
wasderived
fi sh /mi l e .
e x p r e s s e das
a s fish/mile
expressed
relatjonship:
relationship
(2)
(2)
^n
=
N =
[rf
n
E
z cl,tt
Ct/11.3
/LL.3
d = 1I
t=
where,
where,
numberof
total estimated
of spawning
spawning
fr == total
estimatednumber
N
ar ea
fi sh in
i n the
the index
indexarea
fish
i od
the 2-th
ith per
m€dtlcount
count in
in the
period
C4 == mean
C
= number
period
the zlth
th period
days in
in the
numberof
of days
=
ti
t
for coho
salmon
to apply
applyfor
cohosalmon
assumed
An
life
11.3
3 days
dayswas
wasassumed
to
An average
spawning
life of
of 11
averagespawning
(Beidlerand
AUC
estimates
TheAUC
estimates
1980). The
Nickelson
andNickelson
the index
spawning
in
(Beidler
1980)
in the
indexstreams
streams
spawning
few data
data
wherefew
usingstreams
streamswhere
to avoid
avoidusing
were
severalstipulations
stipulations to
werebased
basedon
on several
These
parts of
These
run were
points were
the run
werernissed.
of the
points
missed
significant parts
availableor
or significant
wereavailable
prior to
November;
(1) at least
to or
or on
madeprior
on 88 November,
one survey
rrasmade
surveywas
least one
criteria were
were: (1)
criteria
(3) at
(2) water
least one
surveywas
at least
(2)
water visibility
visibility was
was acceptable,
(3)
one survey
was made
made on
on or
or
acceptable;
apart.
(4) successive
after
January, and
successive surveys
surveys were
were 10
10 or
or fewer
fewer days
days apart
after 99 January;
and(4)
the
before the
al lowedbefore
nere allowed
daysapart
apart were
t0 and
20 days
However,
two
and20
two surveys
surveysbetween
between10
However,
the
in the
last count
or last
countin
the first
first or
If the
AUCestimates
for AUC
estimates. If
discardedfor
survey was
was discarded
survey
days
to occur
occur 77 days
assumed
index
was other
than zero,
count was
was assumed
to
zero count
zero, aa zero
index area
area was
other than
these
meetthese
did not
not meet
that did
units that
All survey
surveyunits
count. All
after the
the actual
actual count
before or
before
or after
index
criteria were
fromthe
the AUC
AUC index
eliminatedfrom
wereeliminated
criteria
--55-
o
indiv' idualstreams,
effor t in
in individual
str eam s,
The
survey
re su l ts of
sur veyeffort
o f the
th e spawning
sp a w ning
T h eresults
a
esentedin
in Appen
di c es
ar e pr
iver basins,
stratified
byy fi
fishery
districts
basins, are
presented
Appendices
sh e ry d
and rriver
stratified b
i stri cts and
r espectively. The
The
chumsalmon,
salmon,respectively
coho, and
andchum
A, B,
fo r fall
fa l l chinook,
A,
B , and
ch i n o o k,coho,
a n dCC for
during the
the 1982-83
1982-83
completedduring
appendices
data from
fron surveys
surveyscompleted
appendicessummarize
surmarizeall
all data
o
distr ict biologists
biologis ts
by district
units surveyed
sur veyedby
spawning
non-standard
i n cl u d i n g n
o n - standar dunits
s p a w n i n gseason
se a so nincluding
for other
other studies
studies.
biologists for
D e ve l o p meSection
n
Stectionbiologists
and
Research
a n dR
e s ea rchand
a n d Development
ookBay
Bay
at Tillam
car cassesat
salm oncarcasses
om chum
Scale
were
obtained
from
chum salmon
Tillamook
b ta i nedfr
S c a l e samples
sa mp l e sw
e re o
o
Length
stocks. Length
age composition
and
Nestucca River
River to determine
determine the age
composition of
of the
the stocks
and Nestucca
(ltlEPS)
posterior scale
and
to posterior
scale (MEPS)
the mid-eye
mid-eyeto
measurements
were
and
from the
measurements
weretaken
taken from
-2.5214
(FL) from
regression FL
FL =
the linear
linear regression
converted
from the
= -2
5214
lengths (FL)
convertedto "ocean"
"ocean"fork lengths
o
(ME P S ).Estimated
r egr essionare
ar e
+
the regression
fr om the
der ived from
fo rk lengths
lengths derived
1 .2048
2 0 4 8(MEPS)
E sti ma te dfork
+ 1
approximate since
since the relationship was
was obtained
obtained for
for coho
coho rather
rather than
than chum
chum
approximate
salmon.
salmon
o
HatcheryFish
Fish Strays
Strays
Hatchery
the
in the
intensive surveys
surveysin
Twelve
for intensive
selected for
streamswere
were selected
Twelveadditional
additional streams
o
( Table2)
2) .
index streams
str eam s(Table
Yaquina
two standard
th
standar dindex
R i ve r to augment
Y a q u i n aRiver
a u g me nthe
t e two
Car cas s es
Carcasses
r iver s
Distr ict rivers
in Lincoln
Lincoln District
off spawned-out
encountered
in
in surveys
sur veysin
n c ounter ed
co
sa l mo ne
o
s p a w n e d -o ucoho
t h osalmon
possible coded-wire-tagged
coded- wir e- tagged
were
marks
indicating possible
fi n mar
ksindicating
fo r adipose
a d i p o sefin
w
e r e inspected
i n s pe cte dfor
a
rearing
analyzerearing
area to
key scale
scale area
fish
were taken
taken from
from the
the key
to analyze
fish and
scale samples
sampleswere
and scale
history.
history
fish
for each
each fish
recordedfor
Sex,
date were
were recorded
location, and
and date
tfiPS length,
length, location,
Sex, MEPS
ssampled
ampled
o
o
--66-
U
a
T a b l e22 .
Table
a
1.982 .
for stray
salm on,1982
str ay coho
cohosalmon,
Yaquina
R 'i ve rtributaries
tri b u tar ies surveyed
sur veyedfor
Y
a q u i n aRiver
Tri butary
Tributary
Area
Area
Creek
BeaverCreek
Beaver
Mill
Creek
MiI 1 Creek
( T r i b u ta ri e s of
B ay)
Y a q u i n aBay)
I (Tributaries
o f Yaquina
I
o
( T r i b u ta ri e s of
lower
l o w e rYaquina
Yaguinaand
andlower
th e lower
II
o f the
I I (Tributaries
B i g Elk
Big
E 1 kCreek)
Creek)
( T r i b u t a r i e sof
River )
YaquinaRiver)
th e upper
u p p e rYaquina
III
o f the
I I I (Tributaries
o
[]
( T r i bu ta ri e s of
B i g Elk
Elk Creek)
Cr eek)
IV
o f upper
u p p e rBig
I V (Tributaries
I
Creek
Bear
Bear Creek
Beaver Creek
Beaver
Creek
Deer Creek
Deer
Creek
Creek
HayesCreek
Hayes
Creek
Thornton
ThorntonCreek
Cr eek
Bales
BalesCreek
Salmon
Creek a
a
SalmonCreek
a
Yaquina
Creek
Upper
Yaquina
Creek a
Upper
Grant
Creek
Grant Creek
Creek
Rail
Rail Canyon
CanyonCreek
Creek
Wildcat
tli ldcat Creek
Wolf
Creek
tlolf Creek
^sterda?d
ast4aJ
Bpawn'vng
f8h eumteya.
arvey
spaning fdeh
o
public and
and
at public
Hatchery coho
were examined
examined for
for coded-wire
coded-wire tags
tags at
salmonwere
Hatchery
coho salmon
District.
L i n c o l nDistrict
private
p r i v a t e hatchery
t h e Lincoln
i n the
f a c i l i t i e s in
h a t c h e r yfacilities
Representative
R e p r e s e n t a t i vscale
sec a l e
( Salm on
public hatcheries
R i v er ,
hatcher ies(Salmon
at public
adults
River,
u n mar ked
adults at
fro m unmarked
o b ta i n e dfrom
ssamples
a r n p l e swere
w e reobtained
o
i s t o r y analysis
analysis.
f o r life
life h
Siletz,
history
F a l l Creek)
C r e e k )for
a n dFall
S i l e t z , and
Scale
analysis
S
c a l eanalysis
o
and Van
Nicholas and
by Nicholas
Scales
were analyzed
methods described
described by
Van Dyke
Dyke
using rnethods
analyzedusing
Scales were
((1982),
1 9 8 2 ) , exce
except
the
scale
training
populations wer
weree not
not specifically
specifically
aining populations
9 8 2sca
l e tr
e 11982
p t th
in
function used
use din
discr im inantfunction
The discriminant
in 1981
1981. The
R i ve r as
as in
tailored
Y a q u i n aRiver
th e Yaquina
t a i l o r e d to the
o
fisher ies.
the ocean
oceanfisheries
in the
1982
classify
caught in
cohocaught
a ssi fy coho
1 9 8 2was
w a sdeveloped
d e ve l o p e dto cl
The
The
River
Nehalem
the Nehalem
fr om the
training
River
collected from
p o p u l a ti o n scontained
scales collected
co n ta i n edwild scales
t r a i n i n g populations
R i v er
anyColumbia
om m
' ling scales
the
Coquille
River,
hatcheryyyear
yearling
scales fr
from
many
Columbia River
i ve r, hatcher
oquille R
o th
eC
ssouth
o u t h tto
a
from
scales from
acceleratedscales
hatcheryaccelerated
andhatchery
and
hatcheries, and
cohohatcheries,
0regoncoho
and all
al I coastal
coastal Oregon
bays
Yaquinabays
OAF
C o o sand
a t Coos
a n dYaquina
tthe
he O
A Ffacilities
fa ci 'l i ti e s at
-7-7-
U-4
o
gr eatestrate
misclassificationoccurred
occur r ed
r ate of
of misclassification
g ro u p s,the
the greatest
Among
A m o n the
g
th re e groups,
th e three
a
the hatchery
gr oups. However,
However94%
, of
of the
hatch er y
year ling groups.
94/
b
e t w e e nthe
t he wild
a n dhatchery
h a tch e ryyearling
w i l d and
between
indicates
function which
whichindicates
the function
by the
g ro u pwas
accelerated
c' lassifiedby
w a scorrectly
co rre ctl y classified
a c c e l e r a te dgroup
r esults of
the
Theresults
of the
accur ate. The
r easonablyaccurate.
th i s component
co mp o nent
ar e reasonably
tthat
h a t estimates
e s t i ma te sof
o f this
are
a
fo r misclassifications.
m isclassifications.
e re not
n o t corrected
co rre cte dfor
analysis
were
a
n a ' l y s i sw
S to ckSize
S i ze
S p a w n i nStock
g
Spawning
I
in the
salmonspawning
adult coho
a tch er yand
The
of
hatchery
wild adult
coho salmon
spawning in
the
and wild
T
h e total
to ta l number
n u mb eo
rf h
r elationship:
fromthe
the relationship:
R i ve r was
w a sestimated
e sti ma te dfrom
Y a q u i n aRiver
Yaquina
n
n
(3)
(3)
(M/m.p)N;
(M/mj)Nj
Nhw=
Nhw
where,
where,
ii=
. = 11
4_
(h)
hatchery (h)
from hatchery
spawnersfrom
of spawners
total number
numberof
Nhw
Nhw== total
( w ) stocks
stocks
a n dw
i l d (w)
and
wild
the
in the
habitat in
spawn' ing
of spawning
to ta l miles
m iles of
habitat
lMl == total
d
ra
i
nage
drainage
stream£rl
in index
index stream
= tot.l
total number
spawnersin
numberof spawners
ili =
((Equation
Equation
2
)
2)
( f( f,)was
fr om:
calculatedfrom:
wascalculated
hatcheryfish
fish (Nh)
The
of
of hatchery
number
The estimated
estimatednumber
(4)
(4)
N6 == N6ypr
Nh
Nhpr
where,
nfiere,
pr ior
prior
p == percentage
percentageof
spawning
adults spawning
of adults
p
to 11 January
January
to
the
in the
percentage
hatchefl fish
r
of
fish in
of hatcher,y
r == percentage
(
fr
6)
population
spawning
i p a wningpopulation
(N.e)
( N w )was
fr om:
calculatedfrom:
wascalculated
w i l d fish
f i s h (Nw)
The estimated
o f wild
numberof
The
estimatednumber
F
(5)
(5)
^^
i
^^
- Nh)
(Nhw- NhwP)
NnwP)
(NnwP
Nrr)++ (Nhw
Nw== (NhwP
Nw
-8-8-
a
R a te
St
r a y i n g Rate
Straying
(S) by
from Oregon
Aqua-Foods
ln
salmonfrom
0regonAqua-Foods
by adult
adult coho
coho salmon
The
in
The rate
rate of straying
straying (S)
a
the equation
fr omthe
equation:
Ya q u i n aRiver
R i ve r was
t h e Yaquina
w a sobtained
o b ta i n e dfrom
the
(6)
(6)
o
.
N6/T ++ Nh
Nh -- Wtl
S == Nh/I
S
nrhere,
where,
to the
adult coho
coho to
the
total return
return of
of adult
T = the
the total
private hatchery
hatchery
private
numberof
of wild
wild coho
coho adults
adults
|Wf := the
the estimated
estimatednumber
private hatchery
hatchery
the private
at the
captured
capturedat
o
RESULTS
RESULTS
F a l l Chinook
Fall
C h i n o o Salmon
kS a l m o n
o
Peakcounts
counts
Peak
( Tabl e
( 11.0
1982(Table
sur veyedin
in 1982
wer esurveyed
Twelve
i n d e x areas
0 miles)
miles) were
T
w e l vestandard
sta n d a rdindex
a reas(11
3).
3)
o
totaling 61
61.2
m i' les .
times totaling
60 times
The
2 miles
i n d e x areas
wer esurveyed
sur veyed60
T h e standard
sta n d a rdindex
a re a swere
79.0
and
adults and
index streams
streamswas
was79
the 12
12 index
The
0 adults
in the
fish/mile count
count in
The average
averagefish/mile
j a c k s totaling
4).
s a l m o (Table
n( T a b l e4)
t o t a l i n g 89
8 9 .88 fall
f a l l chinook
c h i n o o ksalmon
100 .88 jacks
1
was
The
a d u l t index
i n d e xwas
T h eadult
( 67.9
to 81
adults/mi l e) .
81.5
within
since
9 to
5 adults/mile)
tg77 (67
since 1977
ra n g eof
t h e range
o f counts
co u n tsexperienced
e xper ienced
w i t h i n the
peak chinook/mile
counts
the average
chinook/mile counts
in the
averagepeak
There has
trend in
There
has been
beenan
an upward
upwardtrend
n
a
( F i g u r e1)
l.).
t h e mid
m i d 1950's
1 9 5 0 ' s(Figure
since
s i n c e the
o
fl
Salmon
Coho
CohoSalmon
Pe a kcounts
c o u n ts
Peak
o
index
1982. The
The standard
standardindex
in 1982
areasin
48 index
indexareas
Coho
in 48
werecounted
countedin
Cohosalmon
salmonwere
(Table
(559.1
streams were
were surveyed
surveyed 508
508 times
times (559
1 miles) to
to obtain
obtain peak
peak counts
counts (Table
streams
5).
5)
a
salmon,
peakfish/mile
was22
22.7
cohosalmon,
48 index
areas was
The
7 coho
in 48
index areas
fish/mile in
The average
averagepeak
jacks (Table
( Table4)
4) .
l 6 .L
a d u l ts and
a n d66.6
1 adults
6 jacks
o f 16
cconsisting
o n s i s t i ng of
- 9-9-
w er e
Peakcounts
adults were
Peak
countsof
of adults
a
a
t1
o
.o
o
F
sl
F
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o\ 6
r OE
rcB
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0.5
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o
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ol
=t
0.8
zn the total wber of fish to the Zeft.
0.8
|r\
t
the nnber of z*8 in,izdg
1.2
1.0
63( 9) 240(34)
178(18)
1.7
51C 8)
8( 4)
108(13)
105(31)
95(65)
183(43)
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108( 4)
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198(54)
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15( 2) 241(60)
262(74)
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16( 6)
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93( 3)
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47( 2)
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2)
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30(12)
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0)
18( 0)
20( 7)
22( 1)
44(28)
13( 0)
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(tll:lFCtGtF
199(68)
24( 4)
93( 0)
Ftt!f
os.rto'
-N
--
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--
-
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2( 2)b
20( 3)
33( 0)
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110(25)
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1980
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1976
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1975
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25( 8)
33( 9)
97(27)
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A A A A A A A A A A A A
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1914
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1973
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1972
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1966
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1959
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1958
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1957
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1956
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1952
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1953
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1951
@
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oto
clo
1950
a
Tillamook
a
Humbug
o
Nehalem
S
o
Trlb.
S
o
River
S
(\
Peak counts on selected spawning fall chinook surveys, 1950-82.
S
I
Table 3.
S
S
o
oa
o
ta\
o
ri
s.B
R
h
*
B
*
-s
$
R
g
-
index
in standard
spawn' ing
index
Table
fi s h/m ile observed
standar dspawning
T a b l e4.
4 . Average
obser vedin
A ve ra g enumber
or f fish/mile
n u mb eof
streams.
streams.
Year
Y
ear
r
fl
1948
1948
1949
1949
1950
1950
1951
1951
1952
1952
1953
1953
1954
1954
1955
195s
1956
1956
1957
1957
1958
1958
1959
1959
1960
1960
1961
1961
1962
L962
1963
1963
1964
1964
1965
1
965
1966
1
966
1967
1967
1968
1
968
1969
1
969
1970
1970
1971
r97L
1972
t972
1973
L973
1974
t974
1975
1975
1976
1976
1977
t977
1978
1978
1979
t979
1980
1980
1981
1981
1982
L982
Chinook
C h i n o o kSalmon
S a l mo n
T otal
M
iIe s Jacks
Miles
Ja cks Adults
A d u l ts Total
Miles
M 'les
i
Coho Salmon
Coho
Salmon
TotaI
Adults Total
Jacks
r lacks Adults
0
.0
.00
31
3.1
31
3.1
7.1
7.1
87
8.7
71
7.L
7
7.1t
79
7. 9
87
8.7
77
7. 7
8
8 .77
7
.1
71
92
9.2
9.2
9.2
92
9.2
9
9 .22
92
9.2
92
9.2
9
2
9.2
9 .22
9
9.2
9.2
9.2
9
.2
9.2
9.2
9.7
9 .7
89
8.9
92
9 .2
4.6
4
.6
10.5
10.5
11.0
1 1 .0
105
10.5
10
5
1 0 .5
10.5
10.5
105
10.5
11 0
11.0
.00
.00
101
10.1
109
10.9
10.9
10.9
109
10.9
109
1
0.9
122 .11
1
129
12.9
129
t?.9
136
13.6
13
1 3 .66
144
14.4
144
L4.4
14.4
14.4
144
14.4
14
1 4 .44
144
14.4
144
14.4
12
1 2 .99
11
1 1 3. 3
14.4
1
4.4
14.4
1
4.4
14.4
1
4.4
14.4
1
4.4
144
14.4
144
1
4.4
11.3
11.3
14.4
14.4
14.4
14.4
144
14.4
14
1 4 .44
14.4
14.4
527
52.7
53
5 3 .00
.00
.00
29
2.9
94
9.4
3.9
3.9
28
2.8
41
4
.L
2 .00
2
120
L2.0
24
2.4
29
2.9
1
L .77
81
8.1
130
13.0
4.7
4.7
76
7
.6
8
8 .55
154
15.4
44
4.4
25
2 5 0. 0
2 .00
2
13.0
1
3.0
6.0
6
.0
3.0
3.0
5.7
5.7
24
2
.4
110
11.0
5.1
5.1
5.1
5.1
2.3
2.3
28
2.8
2
2 .55
5.5
5.5
16
1.6
6
6 .66
.00
.00
77
7
.7
26
2.6
9.9
9.9
47
4
.7
35
3.5
13
1 3 .44
59
5.9
120
12.0
86
8.6
3
3 .77
273
27.3
116
11.6
10.0
10.0
107
10.7
111 .44
1
195
19.5
122
12.2
122 .00
1
10 2
n.2
11.1
1
1.1
20.9
20.9
8.9
8
.9
19.9
19.9
54
5.4
136
1 3. 6
22.8
22.8
15.4
15.4
14.0
14.0
69
6.9
12
1
12.1
13.1
13.1
78
7
.8
10
1 0 .88
.00
. 00
274
27.4
458
45.8
77.6
77.6
185
18.5
179
17.9
16
1 6 .99
124
12.4
378
3
7.8
558
55.8
399 .00
3
328
3 2. 8
512
5L.2
42.3
42.3
555
55.5
62
5
62.5
591
59.1
618
61.8
49
4 9 .66
32
9
32.9
36.8
36.8
79.9
7 9 .9
43.2
43.2
41.3
41.3
518
5
1.8
588
58.8
58.7
58.7
39.5
39.5
67.9
6 7 .9
770
77.4
811 .55
8
79.0
79.0
742
74.2
79
7 9 .00
.00
. 00
352
35.2
484
48.4
87.5
87.5
232
2
3. 2
214
2
L,4
30
3 0 .33
184
1 8.4
498
49.8
644
64.4
42
4 2 .66
601
60.1
628
62.8
52.3
52.3
662
66.2
73
7 3 .99
786
78.6
740
74.0
61
6 1 .55
43
4 3 2. 2
47.9
4 7. 9
100.8
100.8
52.1
52.I
61.2
6t,2
572
5
7. 2
724
72.4
81.5
81.5
55.0
55.0
81.9
81.9
838
83.8
933 .66
9
92.2
92.2
820
82.0
89
8 9 .88
fl
.
-11-11-
.00
.00
223
22.3
662
66.2
49.1
49.1
144
14.4
150
15.0
29
5
29.5
376
37.6
402
44.2
143
14.3
26
8
26.8
137
13.7
472
47.2
37.0
37.0
252
25.?
533 .88
5
555
5 5. 5
338
33.8
39
3 9 .44
25
3
25.3
31.2
3L.2
42.6
42.6
48.1
48.1
14.9
14.9
283
28.3
179
L7.9
20.0
20.0
20.3
20.3
7.8
7.8
94
9.4
21
7
21.7
13.5
1
3.5
84
8.4
166 .11
1
.00
.00
251
2s.L
757
75.7
53.0
53.0
172
t 7. 2
191
19.1
311.55
3
496
4
9.6
426
42.6
172
17.2
28
2 8 5. 5
217
2t.7
601
60.1
41.7
4t.7
328
32.8
62
3
62.3
709
7
0. 9
383
3
8.3
64
6 43. 3
277 3
2
.3
44.2
44.2
48.7
48.7
s51.0
l.0
20.6
24.6
307
3
0.7
290
29.0
25.1
25.t
25.4
25.4
10.1
10.1
122
t2.2
24
2 4 2. 2
19.0
19.0
100
10.0
222 7
2
.7
Chum Salmon
Salmon
Chum
Miles Adults
ffTfeF-E-dfEs
1
654
7
1 .77
654.7
1
1,251 2
L .77 L,25L.2
25
2.5
25
2.5
2.5
2.s
25
2.5
25
2.5
2 .55
2
25
2.5
25
2.5
25
2.5
2
2 .55
48
4.8
48
4.8
4.8
4.8
48
4.8
4
8
4.8
48
4.8
48
4.8
4
4 .88
4
4 .88
4.8
4.8
4.8
4.8
4.8
4.8
4.8
4.8
4.8
48
4
.8
48
4.8
4.8
4.8
4.8
4.8
4
.8
4.5
45
4 .55
4
4,5
4.5
4.5
45
5
5 .11
3496
3
49.6
6708
670.8
296.4
296.4
4876
497.6
6152
6L5.2
138
1
3 98. 8
\1276
27.6
2660
2
66.0
2732
273.?
112
1 1 28. 8
654
65.4
958
95.8
458.3
458.3
3367
336.7
314
0
31.4.0
1325
132.5
3096
309.6
159.2
L59.2
174 8
L74.8
239.4
239.4
403.3
403.3
285.4
285.4
442.3
442,3
7069
706.9
6935
693
.5
640.8
640.8
242.3
242.3
337.9
3
37.9
6140
6
14.0
53
5 3 6. 6
184.7
184.7
438
4
3.8
523
5 2 33. 3
S
TRENDS IN THE E)CAPEMENT OF FALL CHtNOOK SALMON N OREGON COASTAL RIVERS SINCE
S
lrl
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z
1980
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1970
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a
40
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20
o
60
o
c)
A
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100
o
o
ro
1950
a
tr
.
o
(19-21
Coos/Coquille
llargest
a r g e s t in
A s t o r i a , Unipqua,
n dC
o o s / C o g u i l l ddistricts
e i s t r i c t s (19-21
i n the
t h e Astoria,
t l n p q u a a,and
o
jack
( 7 adults/mile)
P e a kjack
adults/mile)
a d u l t s / m i l e )and
i n the
t h e Siuslaw
S i u s l a wDistrict
D i s t r i c t (7
a d u l t s / m i l e ) . Peak
a n dsmallest
s m a l l e s tin
a ck s/m ile in
fisher y distr
icts
to 3
3 jjacks/mile
northern
districts
in the nor
ther n fishery
ccounts
o u n t s ranged
r a n g e dfrom
fro m t1 to
j a c k s / m i l ein
((Astoria,
Astoria, T
i n southern
Tillamook,
Lincoln,
t o 13-15
1 3 - 1 5jacks/mile
southern
i l l a m o o k ,L
i n c o l n , and
a n dSiuslaw)
S i u s l a w )to
o
r
( U m p q uand
districts
d i s t r i c t s (Umpqua
Coos/Coquille).
aan dCoos/Coquille)
peak coho/mile
standardindex
index streams
streams
The
The trend
countedin
in standard
trend in
in the
the average
averagepeak
coho/mile counted
( F i g u r e2)
2).
has
h a s sharply
t h e mid
m i d1960's
1 9 6 0 ' s(Figure
s h a r p l ydeclined
d e c l i n e dsince
s i n c ethe
o
(AUC)
Total
(AUC)
Total escapement
escapement
A
the 48
48 stream
in 19
19 of
of the
strean areas
areas
wasconducted
conductedin
A sufficient
numberof surveys
surveyswas
sufficient number
o
(40f) to obtain
the index
in the
index areas
(40%)
estimates of total
total fish
areas
fish spawning
spawningin
estimates
obtain escapement
escapement
thr oughoutthe
the
floods throughout
but severe,
sever e,floods
using
u s i n g the
t h e AUG
A U Ctechnique
te ch n i q u e . Intermittent,
In te rm ittent, but
remainingindex
preventedadequate
index
spawning season
in the
the remaining
effort in
adequatesurveying
surveying effort
spawning
seasonprevented
a
streams
streams.
10
32 adults/mile
adu'lts/mile and
and 10
The
of spawners
averaged32
The estimated
total escapement
escapement
spawnersaveraged
estimatedtotal
( Table 5)
jjacks/mile
a c k s / m i le b
based
data
obtained
19 standard
5) .
in 19
standar dsurveys
sur veys(Table
a ta o
b tainedin
a se dupon
u p o nd
o
The
The
to fish/mile
fish/m ile
estimates
within
distr ict were
wer esimilar
similar to
eachdistrict
to ta l spawners
w i thin each
e s t i m a t e sof
o f total
sp a w n e rs
ict and
ia Distr
although
were
available for
for the
the Astor
Astoria
District
and only
only one
one
a ta w
e re available
iindexes,
n d e x e s ,a
'l th o u g hnnoo ddata
Distr ict.
q ua l i fi e d for
stream
AUC
estimates
in the Coos/Coquille
U Ce
Coos/CoquilleDistrict
fo r A
sti matesin
s t r e a mqualified
o
The
The data
data
indicate that
that peak
peak fish/mile
fish/mile indexes
for adults account
account for
for about
about 50X
50% of
of the
the
indexesfor
total
in
the survey
area.
in the
survey area
total estimated
estimatedescapement
escapement
o
a
-13-13-
I
I-
U
U
0
i-i-i
Lj
Cr)
I
=
3llv\/HSrJ XVSd SCVU3AV
FIG 2
U
20
40
60
80
1950
1960
YEAR
1970
1980
lr)
a
lrJ
z
6
a
v
trj
v
F
J
(n
()
z
o
O
C)
lrJ
V
z
z
o
J
tn
o
:E
o
L
o
F
zld
b-t
L
C)
(t
IJ
IJ
I
F
z
a
o
z
trj
E
F
TRENDS IN THE ESCAPEMENT OF COHO SALMON IN OREGON COASTAL RIVERS SINCE 1950
d
Table
of peak
neak fish/mile
fish/mile counts
counts and
and estimated
estimated total
of
Table5.
total escanement
escapement
of
5. Suimiarv
Surmaryof
coho
c o h osalmon
str eamsby
fisher y district,
distr ict, 1982
1982.
i n standard
sta n d a rdindex
i n d e x streams
by fishery
s a l m o nin
Survey effort
Fi shery
Fishery
district
district
Total
Total
Noo .
N
surveys
surveys
Miles
Miles
miles
miles
Peak
Peakcount
count
p e r mile
mi ilIee
per
Adults
Jacks
fdu]T5--Tffi
3
3
('
Estimated escapements
Estimated
escapements
No
No.
surveys Adults
Adults Jacks
Jacks
surveys
Astoria
7
Astori a
7
7
7
Tillamook
Ti I I amook
Lincoln
100
Lincoln
1
Siuslaw
S
ius'law
I8
Umpqua
7
Umpqua
7
Coos/Coquille
9
9
C o o s / C o qIul e
i
6
6 .66
7
7 .44
10.6
10.6
7 .5
7
5
11
1 1 5. 5
9
4
9 .4
55
5 5 .88
788 .11
7
124.6
L24.6
91
9 t .22
127
l ? 7.00
82
4
82.4
19
19
t122
155
1
7
7
21
2l
19
19
1
1
2
2
2
2
15
15
13
13
0
0
3
3
3
3
7
7
5
5
1
1
Oregon
OregonCoast
48
Coast48
53
5 3 0. 0
559
5 5 91. 1
166
1
7
19
19
-36
365
39
392
13
132
45
45
70
70
--
32
32
100
1
5
2
2
27
27
30
30
aFdeh/nile clerived
qtinatea.
(AIIC)e8tt.matea
aFl,ah/ml,ie
dervvedfrom
fromuea-underth*oum;e
areaunderthecurve (AL/C)
Hatchery-influenced
Hatchery-influencedversus
wi ld streams
versuswild
streams
peakfish/mile
19 adults
The
streans was
was18
adults
The average
fish/mile in
hatchery-influencedstreams
averagepeak
in hatchery-influenced
in streams
streamscontaining
containing
and
jacks compared
compared to
to 22
22 adults and
8 jacks
jacks in
and 8
and 6 jacks
p
r e d o m i na te l wild
y i l d stocks
likewise
were
wer elikewise
T he estimated
total escapements
escapem ents
predominately
estimatedtotal
w
sto cks. The
i n the
th e two
tw o classifications
ssimilar
i m i l a r in
cl a ssi fi ca tions.
the
In hatchery-influenced
streams,
str eam s,the
hatcher y- influenced
and 4
estimated
density was
was 28
28 adults/mile
4 iacks/m
jacks/mile
adu' lts/mileand
to ta l spawning
e
s t i m a t e daverage
a ve ra g etotal
sp a w ningdensity
ile
ile in
to be
be
believed to
in streams
str eam sbelieved
244 adults/mile
10 jacks/m
jacks/mile
a n d 10
ccompared
o m p a r eto
d 2
a d u l ts/mi l e and
total compilation
compilation
basedon
are based
on aa total
Theseestimates
estimatesare
restricted
restricted to
to wild
wild spawners
spawners. These
the 1982-83
1982-83
during the
surveyedduring
of all
index units
units surveyed
nonstandardindex
al I standard
standardand
and nonstandard
the
45Xor
460.4
miles of
4 miles
or 460
of the
The nonstandard
nonstandardsurveys
surveyscomprised
comprised45%
spawning
spawningseason
season. The
w el l
as
Nonstandaras
d well
salmon. Nonstandard
for coho
cohosalmon
total
mi l e s reportedly
re p o rte d l y surveyed
sur veyedfor
t o t a l 1,019
1 1 01 95.5miles
as standard
byFishery
Fishery District
District in
in Appendix
Appendix B.
B
sunnarizedby
as
standardsurveys
surveSnare
are sunitiarized
-15
-15--
-
I
o
E
s c a p e m e ninto
T e n mi l elakes
l a ke s
its
n to Tenmile
Escapements
o
jacks were
in 4.8
of
P e akcounts
a d u 'l tsand
and 105
105 jacks
wer eobtained
obtainedin
Peak
4 8 miles
miles of
co u n tsof
1 2 7 adults
o f 127
lakes.
Tenmilelakes
streamssurveyed
surveyedat
at Tenmile
streams
previous
andprevious
these counts
countsand
Basedon
on these
Based
population
population estimates
estimates from
from tag-recapture
tag-recapture programs,
programs, the
the total
total escapement
escapement in
in 1982
1982
o
These
4,000 jacks
4,500 adults
adults and
and 4,000
w a s8,500
8 , 5 0 0 coho
sa l mo ncomprised
co mp ri sedof
of 4,500
was
co h osalmon
iacks. These
( 4,500 adults
adults and
and
in 1981
1981(4,500
to estimates
obtain in
estimates
n e a rl y identical
i d e n ti ca l to
estim atesobtain
e s t i m a t e sare
a re nearly
jacks), indicating
lake system
systemthat
that
not improved
improvedin
in the
the lake
3,000
have
have not
3,000 jacks),
escapements
indicating escapements
a
(1949-73).
spawners
once averaged
averaged38,000
38,000spawners
once
(1949-73)
Chum
Chum Salmon
Salmon
a
T i l ' l a m o okBay
Bay
Tillamook
in eight
eight index
index
beenirregularly
irregular'ly counted
countedin
have been
Peak
Chumsalmon
salmonhave
Peak counts
counts. Chum
o
(Table6)
6).
areas since
1949(Table
since 1948
areas
for standard
usedfor
standard
areas are
are currently
currently used
Seven
Sevenindex
index areas
lchis, and
and
iam i, Ki'
in the
the M
stocks in
surveys
Miami,
Kilchis,
th e condition
co n d i ti on of the stocks
a sse ssthe
s u r v e y sto assess
l,lilson rivers
rivers.
Wilson
o
41 times
times
weresurveyed
surveyed41
In
index areas
areaswere
In 1982,
1982, the
the standard
standardindex
i n the
the
p e a kfish/mile
s a l m o nin
w a s610
6 1 02. 2chum
c h u msalmon
f i s h / m i l e was
T h eaverage
a v e r a g epeak
ttotaling
o t a l i n g 24
2 4 .11 miles
m i l e s . The
compared
wasexcellent
excellent compared
was
The chum
escapement
chumsalmon
salmonescapement
index streams
standard
standardindex
streams. The
River
NestuccaRiver
Bayand
andNestucca
TillamookBay
with
in Tillamook
i n d e x counts
countsin
h i s to ri ca l average
w i t h historical
a ve ra g eindex
c
(T a b l e4)
4 ).
combined
(Table
c o m b i n ed
( Figur e3)
The
3) . The
p e a kcounts
194S(Figure
since1948
h a vewidely
fluctuatedsince
Average
widely fluctuated
Av era g epeak
co u n tshave
to variable
var iable
pr imar ily been
a rs have
r esponseto
beenin
in response
fluctuations
years
haveprimarily
re ce n t ye
f l u c t u a t i o n s in
i n recent
o
Bay
oo kBay
gill- net fishery
in Tillam
fisher y in
cial gill-net
natural
rates
commercial
Tillamook
te s since
si n ce the conner
n
a t u r a l survival
su rvi va l ra
th e 1961
1 9 6 1season
season.
was
fo l l o w i n g the
w
a scclosed
l o s ed following
River ' in
in 1977
1977
Kilchis River,
Cr eek,Kilchis
in Coal
Coal Creek,
installed in
tra p was
w a sinstalled
T r a p counts
Trap
co u n ts. AA trap
a
U
pr ivate hatchery
u s e.
public and
hatcher yuse
and private
eggs
excess
chum salmon
for public
salm onfor
fro m e
xce sschum
tto
o ccollect
g g s from
o l l e ct e
private hatchery
hatchery
personneland
by private
and'funded
ODFl,l
The
personnel
funded by
by OOFW
The trap
trap was
wasoperated
operatedby
ivate interests
of the
ggs
90[ of
r etain 90%
inter ests retain
operators
with
the
that pr
private
the e
eggs
e stipulation
sti p u l a ti o n that
o
p e r a t o rsw
i th th
--1616-
I
Table
T a b l e6.
6.
Mi
a miRiver
Miami
R i ve r
o
Year
Year
1948
1948
49
49
o
o
1950
1950
51
51
52
52
53
53
54
54
55
55
56
56
57
57
58
58
59
59
1960
1960
61
6 1 bb
o
o
a
o
o
Peak
P e a kcounts
salmon
in
i n Tillamook
T i l l a m o o kBay
t r i b u t a r i e s , 11948-82.
.948-82.
o f chum
c h u msalmon
B a ytributaries,
c o u n t sof
Main
ffi
Moss
Stem
Stem Cr.
Cr.
Cr.
Cr.
-----:-:
---::
----
450
450
361
361
256
256
193
193
102
102
136
136
571
s71
302
302
323
323
104
104
194
194
173
L73
151
151
214
2L4
135
135
102
102
235
235
371
37L
416
416
349
349
148
148
182
182
857
857
27
27
0
0
6
6
86
86
39
39
18
18
0
0
50
50
31
3l
9
9
4
4
183
183
73
73
13
13
-----------::
-17
t7
29
29
330
330
73
73
14
14
10
l0
54
54
34
34
7
7
Prouty
----
-------::
--65
65
76
76
Cr.
Cr.
-454
454
-1,347
1,347
-420
420
-699
699
-487
487
-780
780
-906
906
-201
201
-102
102
-351
351
-331
331
-87
87
104
2
2
104
154
13
154
13
1,142
6
t,L42
6
Wilson
River
lillamook
l,{
Ison
i
River --ffiiT'-r
Ti
I lamookRiver
River
Little North
Main
fiETe--N'ofin'
Fork
Fork
209
249
419
419
142
t42
712
712
182
18?
104
104
381
381
97
97
194
194
172
17?
153
153
152
152
20
20
13
13
6
6
-4
4
-191
1 ;;
--
--
--
---75
75
--
221
22L
231
23t
475
475
532
532
27
27
25
25
109
109
133
1
61
61
87
87
25
25
107
107
50
50
64
64
94
94
127
t27
474
474
373
373
310
310
214
2t4
124
L24
326
326
82
82
724
724
182
t82
825
825
Miles
M
i ' l e s 0.6
0.6
0.6
0.6
0.5
0.5
1.0
1
.0
0.5
0.5
0.6
0.6
0.5
0.5
622
6
63
63
64
64
65
65
66
66
67
67
68
68
69
69
1970
1970
71
71
72
72
73
73
74
74
75
75
76
76
77
77
78
78
79
79
1980
1980
81
81
82
82
149
149
allonat@tdard.
allon8tQ,4a?1i
333
333
111
1
11
173
173
l:
19
---
4
4
0
0
Ki!chis
K i I c h i s River
River
Clear
Main Coal
ffi
Stem
Stem Cr.
Cr.
3
3
178
L78
220
220
165
165
65
65
30
30
61
61
18
18
37
37
34
34
85
85
105
105
271
27L
2
3
15
15
42
42
0
0
33
33
62
62
70
70
119
1 1 9 325
325
136 1,266
L ,266
136
85
797
85
797
2
3
0
-:
--5
5
3
3
397
397
284
284
985
985
802
802
870
870
404
404
1,002
1,002
430
430
413
413
812
812
1,383
1,383
889
889
1,358
1,358
1,662
L,662
813
813
1,328
1,328
313
313
916 c
°
916
d
300 d
300
??
52
--
57
57
--
5
5
18
18
0
0
12
12
3
3
0
0
1
1
23
23
2
2
0
0
3
3
85
85
22
22
2
2
Stem
Stem
-------------
-i
4
39
39
61
61
62
62
16
16
18
18
74
74
41
41
111
1
15
15
27
27
13
13
83
83
68
68
63
63
66
66
45
45
122
122
182
182
14
14
43
43
---
0.8
0,8
rvey unit.
surleA
tmit.
bconmereial gill-net
the 1961
7967
*ealon.
after the
bo,,ercjaj
8easOfl.
eloed, after
gitl-net fieheriee
elnsnsalmon
aalmonclosed
fon chum
fiehe?ia for
a
U
eyrq constructed
79?7.
llooqiben 1977.
on 25
25 November
CTrcp
uashd out
otrt on
the mouth
nouth washed
aboue the
mtle above
eonatmtetd 0.5
0.5 mile
(Sarne
W?A)
The
total
run
was
916
chum
salmon
(Sans
1980).
tNB
976
ehun
sdlnon
the estimated
total
?un
ati,nated
dsunteT area
Coal Creek
Wq
Cteek Trap
the CoaL
wtle below
belou the
shortened from
from 0.8
mile to
to 0.5
0.5 mile
0.8 mi,Le
eea ehox+ened
since
7978.
sinee 1978.
-L7-17-
I
co
3lrn/HStJ XV3d3CVU3AV
Lii
(:1
Ui
a.
Iii
4(
6C
8C
o
o
o
Ii-
I
o
o
(\
1O(
1 2(
I
I
I
S
I
5
I
II
I
S
S
II
I
S
tI
I
I
II
@
gt
C.,l
o
1960
E6
S=
YEAR
I
I
I
ot
F
S
1970
I
lrj
I
I
I
I
I
I
I
I
1980
I
|!
o
a
ot
o
|o
o
z
<
xlrl
o
fiE,
o
E
6
z
fan
-
=
IJ.J
2
J
f,
I
()
b-
es
o
Eqt
O, trl
fii-
69
8A
HK
z5
tro
E:
EF
lrJ -l
rt
td
v,
(,
f
L
TILLAMOOK BAY SINCE 1948
TRENDS IN THE ESCAPEMENT OF CHUM SALMON IN THE STANDARD INDEX AREAS OF
S
;
1950
I
.
F
o
FIGURE 3
I
I
i
.--------.-----
o
0
o
o
2C
.
@
o
I
I
I
I
o
predeterminednumber
and
Coal Creek
Creek after
after aa predetermined
numberof adults
adu'lts
10f as
as smolts
smolts in Coal
and replant 10%
o
placed in
The trap
trap was
in the
the standard
spawning
was
upstreanto
wasplaced
standardspawning
wasreleased
releasedupstream
to spawn
spawn. The
sur veyunit
the survey
uni t
mi l e above
abovethe
the mouth
mouth. As
As aa result,
r esult, the
5 mile
u n i t about
ffish
i s h survey
s u r v e yunit
a b o u t00 .5
from 00.8
to 00.5
mile.
was
8 to
5 mile
wasshortened
shortenedfrom
o
However,
However,trap
trap records
havebeen
been
recordshave
( Table7),
p e rso n nelsince
7) , which
maintained
1977(Table
whichare
ar e useful
useful in
in
b y hatchery
h a tch e rypersonnel
since 1977
m a i n t a i ne dby
I n 1982,
1 9 8 2 ,1,661
1 , 6 6 1chum
s a l m o nwere
were
C r e e k . In
c h u msalmon
charting
s t o c ksize
s i z e trends
t r e n d sin
i n Coal
C o a lCreek
c h a r t i n gstock
record-high1,746
L,746
large as
as the
the record-high
trapped
trapped in
in Coal
Coal Creek
Creekwhich
nearly as
as large
wtrichwas
wasnearly
o
rrecorded
e c o r d e din
i n 1978
1978.
L977- 82.
tr apping records,
r ecor ds, 1977-82
Coal
River , chum
salmontrapping
C o a l Creek,
C re e k,Kilchis
K i l ch i s River,
chumsalmon
Table
T a b l e77 .
o
Males
ffi
1977b
t977b
209
209
745
745
78
78
79
79
1980
1980
o
Releasedabove
Released
above
Females
Year
Year
81
81
82
82
241
24L
365
365
272
272
958
958
176
L76
379
379
126
126
209
209
224
224
334
334
Spawned
Spawneda
Females
Males
ffi
82
82
254
254
0
.:
--3
3
52
5?
368
368
0
0
53
53
109
109
366
366
Buried
Bur ied
Males
Females
ffi
0
00
0
00
0
00
388 0
3
0
00
0
00
Total
lotal
trapped
trapped
519
519
t1,746
,746
367
367
665
665
605
605
1,661
1,661
0
0
0
0
0
0
auarc
the trap.
trap.
obooe the
aMale chum
are usually
ueually reLeased
releaaed above
wel for
epanndngoe
ehwnuaed
fon apawn1.ng
o
bfrq waehed
bTrap
25 November
Nooanber197?
7977.
uashd out 25
(Sqne1980).
7980).
Coal
Coal,Creek
Cneek(Some
in
976t.n
Total chum
Balmon run
mn e8tmated
eeti'natd ate 916
ehwn ealmon
Total
at
nales for
for chum
chumsalmon
salmoncaptured
capturedat
The
ratio was
4?%females
femalesand
58%males
Thesex
was42%
and58%
sex ratio
I
(1977-81)
previousyears
years(1977-81)
ratio in
in previous
Coal
trap in
in 1982
1982. The
Theaverage
averagesex
sex ratio
CoalCreek
Creektrap
(43Xfemales
was similar
femalesand
57Xmales)
males).
and57%
was
similar (43%
Nestucca
N e s t u c c aRiver
R i ve r
1950
River, since
NestuccaRiver,
since 1950
Chum
Creek, Nestucca
have been
beencounted
in Clear
C'learCreek,
countedin
salmonhave
Chumsalmon
( T a b l e8)
(Table
8 ).
I
pr ovide aa useful
indic ator
useful indicator
The
in the
the index
index stream
str eamprovide
T
h e annual
a n n u a lsurveys
su rve ysin
River .
in the
the Nestucca
NestuccaRiver
of
tre n d of
o f chum
ch u msalmon
salmonin
t h e long-term
l o n g -te rmtrend
o f the
index
8 miles
m iles.
1 1 times
ti mes totaling
totaling 88.8
w a ssurveyed
i n d e x area
su rve ye d11
a r e a was
o
-19-19-
th e
In
In 1982,
1982,the
peakcount
45
The
The peak
countwas
was45
o
(5 6 .3
Thesurvey
ClearCreek
Creek
22 November
Novem ber
1982. The
in Clear
chum
3 fish/mile)
1982
o n 22
sur veyin
c h u msalmon
fi sh /mi l e ) on
s a l mo n(56
o
lower 0.2
was hampered
when a
denied access
0 2 mile of
of the
the index
to the
the lower
index
accessto
was
hampered
landownerdenied
when
a landowner
years.
previousyears
proportion of
greater proportion
in previous
area where
where a
in
salmonspawned
spawned
of chum
chumsalmon
area
a greater
peak count
in
Therefore, the peak
count was
was probably
probably smaller
counts made
made in
relative to counts
smaller relative
Therefore,
o
y ea rs
earlier
e a r l i e r years.
Table
T
a b l e8.
8.
River , 1950-82.
1950- 82.
Cr eek,Nestucca
Nestucca
Peak
River,
ClearCreek,
in Clear
P e a kcounts
o f chum
ch u msalmon
salmonin
co u n tsof
Peak
Peik
o
Year
Year
1950
1950
51
51
52
52
o
.
o
o
o
o
53
53
54
54
55
55
56
56
57
57
58
58
59
59
1960
1960
61
61
62
62
63
63
64
64
65
65
66
66
67
67
68
68
69
69
count
count acl
Year
Year
1970
1970
56
56
73
73
43
43
71
7L
72
72
73
73
74
74
75
75
76
76
77
77
78
78
79
79
1980
1980
81
81
82b
82b
5
178
178
35
35
13
13
88
88
165
165
36
36
6
6
57
57
156
156
196
196
40
40
35
35
89
89
72
72
80
80
35
35
5
Peak
Peak
count
count
53
53
45
45
49
49
109
109
214
214
34
34
72
72
116
1
16
295
295
188
1
87
87
9
9
45
45
asunteqed
aS,ed 0 80.8rni,le.
mi.Le.
bLqtdottner
and
nrile wae
uas
0.2 mile
ald 0.2
surrt)eA
rtLe of
of the survey
bLc,,zdoer denied
2 r,n.le
caeeao to lower
Louen00,2
denid aeoeea
added to
to the
end,.
the upper
uppenend.
1950
fluctuations since
since 1950
wide fluctuations
Peak
have shown
shownwide
Peakcounts
counts of chum
chumsalmon
salmonhave
(Figure 4)
(Figure
4).
generally occurred
1954
since 1954
occurredsince
A
has
has generally
dominance
A 4-year
4-year cycle
cycle of dominance
prevalent in
in
4-year-old spawners
spawnersprevalent
corresponding
dominantage
class of
of 4-year-old
the dominant
age class
correspondingto the
o
produced
genera'llyproduced
havegenerally
spawnershave
numberof spawners
Oregon
Large number
salmonstocks
stocks. Large
0regonchum
chumsalmon
in poor
large
small numbers
numbers of
of spawners
spawners have
have generally
generally resulted
resulted in
poor
large returns while small
-20-20-
S
1980
()
TRENDS IN THE ESCAPEMENT OF CHUM SALMON IN CLEAR CREEK, NESTUCCA RIVER,
00
o,
E,
IJ
E
()
()
:)
F
a
b.J
.
z
Y
td
td
M.
1970
o
r\
c)
v.'
o,
r
ul
J
()
YEAR
trz
br
*.
J
.
a
=
l
I
CJ
S
1960
o
(o
o,
L
o
F
z
lrJ
2
tlJ
o()
(n
Fc)
-f)
=o,
v1
100
200
400
o
o
o
300
o
o
.t
O
c{
U
ln
ct
O
lJz
r6
+
(9
S
-21-
>
LU
ci
Lii
0
W
LI-
(-I)
I
:=!
S
Lii
lllY\,/Hsll XVSdICVUfAV
F
tij
z()
FIG. 4.
1950
o
tL
SINCE 1950.
S
td
lrJ
o
ye a rs later
l a te r.
r e t u r n s 44 years
returns
pr imar ily fluctuated
fluctuated
haveprimarily
River chum
sa' lmon
Nestucca
have
chumsalmon
N e stu ccaRiver
gill- net fisheries
fisher ies were
w er e
comm er cial
alonesince
s' incecommercial
mo rta l i ty factors
fa cto rs alone
gill-net
ffrom
r o m natural
n a t u ra l mortality
o
t o materialize
m a t e r i a l i z ein
in
( C l e a v e 1951)
r1 9 5 1 ) . AA large
i u n failed
f a i l e d to
l a r g e run
M a r c h1927
1 9 2 7(Cleaver
cclosed
l o s e dafter
a f t e r March
tly aa
aybe
in 1978;
1982
the
record
high
count in
1978, however
however, ,this
this m
may
be par
partly
e re
i g h count
o l l ow i n g th
co rd h
1 9 8 2ffollowing
mile of
of Clear
Cl ear
lower 0.2
in the
sur vey salmon
salm onin
to survey
the lower
0 2 mile
l a ck of
ffunction
u n c t i o n of
of aa lack
o f access
a cce ssto
o
C
reek.
Creek
A
ge-e
l n g th composition
co mp o si ti o n
Age-length
o
in
recoveredin
carcassesrecovered
chumsalmon
salmoncarcasses
from 88
Scale
were obtained
obtained from
88 chum
sampleswere
Scale samples
42
46 males
malesand
and42
of 46
consistedof
Thesample
sampleconsisted
i n 1982
1 982. The
B a ytributaries
tri b u ta ri e s in
T i l l a m o o kBay
Tillamook
4,
78.4%
age4,
3, 78
4% age
20.4X
age 3,
was20
the chum
stocks was
chumstocks
4% age
of the
The age
age composition
compositionof
females. The
females
o
(Table9)
age55 (Table
9).
and
1% age
and 11.1X
growthincrements
age 44
incrementson
on age
Cursory
of growth
inspection of
Cursoryinspection
life (1981)
(1981) compared
compared
growth was
in the
fish indicated
was poor
poor in
the third
third year
year of
of life
fish
indicated that growth
year.
fourth year
to the
the fourth
to
o
production and
and consequently
consequently
food production
that food
This
might indicate
indicate that
This might
Meanlengths
lengths of
of
1981. Mean
poor oceanic
in 1981
conditionsin
growth was
by poor
oceanicconditions
growth
by
hampered
washampered
cm
4 cm
to 69
69.4
emFL
FLat
at age
age 33 to
67.7
frqn 67
rangedfrom
female
7 cm
Bayranged
Ti'llamookBay
in Tillamook
female chum
chumsalmon
salmonin
F L at
a t age
a g e44 .
FL
o
to
FL at
at age
age33 to
70.7
cmFL
fr om 70
r angingfrom
Males
7 cm
lar ger , ranging
sl i g h tly larger,
Ma
l e swere
w e reslightly
(T a b l e10)
10).
7
a t age
a g e 44 (Table
733 .33 c
cm
FLL at
mF
T a b ' l e99 .
Table
1982
Baychum
chumsalmon,
salmon,1982.
TillamookBay
of Tillamook
Sex
a g e composition
com positionof
S e xratio
ra ti o and
a n d age
o
Sex ratio
Age
o
3
3
4
4
5
5
Tota'l
Total
Age composition
Total
Females
Males
No
No
1
7
7
35
35
0
0
L6.7
167
8 3 3. 3
83
00
0.0
18
18
69
69
1
239
2
3.9
73.9
73
9
2.2
22
1
I
20.4
204
78
4
78.4
11
1.1
46
46
52
3
52.3
42
42
47
7
47.7
88
88
100.0
100
0
11
11
34
34
-22-22-
o
'l
a l m o n1982
,1 9 8 2 .
Baychum
chums
Ti I amook
Bay
salmon,
of Tillamook
I e 10
10. Mean
Meanlengths
lengths of
Tab
Table
an lengths
en s
Mean
o
Females
Males
o
MEPS
FL
Age
MEPS
3
3
4
4
5
5
6
0.8
608
62.9
629
66.0
660
707
70.7
73.3
733
7 7. 0
770
58.3
583
59.7
597
--
FL
677
6 7. 7
69.4
694
--
-2.5274
noeeann fork
7.2048
5214 ++ 1.2048
aMean
fork Lengthe
length8 qnaetted
converted fron
from the
the regneeei'on
regresewn FL
FL = 2
Q,teut "ocean"
meaou?anefltl.
(MEPS).
MEl'S
lengths ee
are nidey*poaterion
rin4eyepostervor seale
scale measurements.
MEPStettgtha
(MEl'S)
o
Nestu c c a
the Nestucca
in the
chumsalmon
salmonin
four chum
only four
fr om only
Scale
o b ta i nedfrom
w e reobtained
S
c a l e samples
sa mp l e swere
pr ogenyfrom
fr on the
the
wer eprogeny
salmonwere
The four salmon
( o ne male
fe males) . The
th re e females)
ma l eand
a n dthree
River
R
i v e r (one
o
(a g e4)
ye a r (age
4 ).
b r o o dyear
1978
1 9 7 8brood
Strays
Sa1mon
HatcheryCoho
CohoSalmon
Hatchery
Strays
o
re co ve ri e s
Coded-wire
tag
ta g recoveries
C o d e d - wi re
Bay
YaquinaBay
in Yaquina
recoveredin
were recovered
Aqua-Foods
0regonAqua-Foods
from Oregon
Nine
strays
were
Nine CWT
C1.1T
strays from
o
(T a b l e11)
1 1 ).
tributaries
t r i b u t a r i es (Table
sampl ed,
ar eassampled,
four areas
all four
The
in all
r ecover edin
wer erecovered
tags were
T
h e tags
the river
r iver
thr oughoutthe
distr ibuted throughout
fish were
wer edistributed
a tch e r yfish
that
hatchery
stra y h
a t stray
iindicating
n d i c a t i ng th
system.
system
o
o
fl
o
-23-23-
o
recoveredat
at ttner
were also
also recovered
Aqua-Foods
OregonAqua-Foods
Tagged coho
were
other
by Oregon
Tagged
released by
coho released
o
S
(T a ble11)
r elatively large
lar ge number
num berof
of strays
str ay s
11) . The
The relatively
l o ca l i ti e s (Table
0
r e g o ncoastal
c o a sta l localities
Oregon
hatcheries
other coastal
coastalhatcheries
with other
compared
Hatcherycompared
recovered
with
River Hatchery
recoveredat
at Salmon
SalmonRiver
p
g e o g r a p h i positioning
c o s i t i o n i n gof
t h e facilities
faci'lities
o f the
p r o b a b l yreflects
t h e geographic
i n the
probably
r e f l e c t s differences
d i f f e r e n c e sin
o
fl
( Nicholaset
al.
et al
site (Nicholas
at each
eachsite
of straying
str ayingat
i n d exof
rather
r a t h e r than
t h an any
me a su ra b lindex
e
a n ymeasurable
distanc e
the m
ain stem
stemaa short
shor t distance
located on
on the
main
H a tch e ryis
i s located
R i ve r Hatchery
1
9 8 2 ) . Salmon
Sa l mo nRiver
1982)
locatedon
on
ar e located
hatcher iesare
Fall Creek
Cr eekhatcheries
above
S i l e tz and
andFall
t i d ew a te r, while
w h i l e Siletz
a b o v etidewater,
o
S
mu chfurther
fu rth e r upstream.
u p stream.
t r i b u t a r i e s much
tributaries
recovered
Aqua-Foods
0regonAqua-Foods
Bay by
by Oregon
YaquinaBay
recovered
in Yaquina
released in
Table 11
11. Tagged
Taggedcoho
coho released
Table
in
1982.
sites
coastal sites in 1982
at
Oregon coastal
at Oregon
o
site
Recoverv
Recovery site
o
Hatchery
Salmon
Salmon River
River Hatchery
H a tcher y
R i ve r Hatchery
Siletz
S
i l e tz River
River
S i l e t z River
Siletz
Bay
YaquinaBay
Oregon Aqua-Foods,
Aqua-Foods, Yaquina
0regon
R i ve r
Y
a q u i n aRiver
Yaquina
( AlseaRiver)
River)
H a tch er y(Alsea
F a l l Creek
Fall
C re e kHatchery
R i ve r
Alsea
A
'l se aRiver
Creek
Beaver
BeaverCreek
H a tch e r y
E l k River
R i ve r Hatchery
Elk
1
1
4,954
4,954a
9
9
11
2
2b
11
1
1
Total
Total
4,992
4,992
o
a5"245
a5
,245
Number
Number
2?
22
1
1
reeooenedfrom
onI.yrecovered
togewere
uereoniy
po8em.ki coho
were
exami,ned,
buttag8
aartned, but
eoho
uene
fton
adlpoa*narkd
4,954.
4,954.
O
pecooened
brnelud,ee
in
epott fi-8hery
Rdoer eport
in the
Alsea Ri-ver
bInclude8 one
i-n
the Al8ea
toggetl coho
aho recovered
otte tagged
fiehezg in
7982.
September
Septaibet 1982.
o
nalysis
S c a l eA
Scale
Analysis
R i v er
YaquinaRiver
in Yaquina
car cassesin
salmoncarcasses
Samplers
fr om coho
cohosalmon
1 6 5 scales
sc ales from
co l l e cte d 165
S a m p l e rscollected
hatche r i es
Fall Creek
Cr eekhatcheries
River , and
andFall
River , Siletz
Si' letz River,
tributaries
S a l mo nRiver,
5 7 4 at
a t Salmon
a n d 574
t r i b u t a r i es and
o
1 2 ).
combined
c o m b i n e(Table
d(T a b l e12)
Ja nuar y
River after
after 1L January
YaquinaRiver
Scale
collected
in Yaquina
collected in
S ca l e samples
sam p' les
studies
of similar
similar studies
the results
results of
on the
1983 were
were assumed
to be
from wild coho
coho based
based on
be from
assumed
1983
( N i c h o l a sand
1982).
V a nDyke
D y k e1982)
a n dVan
( N i c h o l a set
1 9 8 1(Nicholas
a n d 1981
9 8 0(Nicholas
e t al
a I . 11982)
9 8 2 ) and
iin
n 1
1980
-24-24-
o
Table
T a b l e12
12.
Source
collected
collectedin
in 1982-83
1.982- 83.
scale samples
samp' les
S o u rceof
co h osalmon
sa l m onscale
o f coho
o
a
O
Total
Total
Spawning
Sp a w n i nsurveys:
su
g rve ys:
Vaquina
Yaquina
Yaquina
Y
a q una
i
Hatcheries
Hatcheries:
Salmon
River
R i ve r
Sa l m on
Siletz
River
Siletz River
Fall
F a l l Creek
Creek
Jacks
Jacks
u Iits
Adu
ts
Readable Unr ea dab'l
e e
to 12/30
L2130
11/5 to
11/5
2/3
1/1 to
1/1
to 2/3
132
132
33
33
14
14
16
16
95
95
Lt/6
11/4,
Lt/4, 11/6
11/1
ILIL
11/8-9
11/8-9
181
181
196
196
197
L97
4
4
I1
140
140
145
145
157
L57
3
3
23
23
4
4
13
1 3 aa
40
40
47
47
37
37
aALL scales
vild coho
sho
to be
be from
aAll
aaeumedto
7988were
uere aaewned
after 17 January
JuruwtT 1983
eealee collected
olleeted after
fpon wild
ute*e
taed
Some
of
these
8cale8
were
used
theee
of
eoales
80
i'n the
the strayi.ng
etudy. Sone
included in
etrqittg 8tudy.
so were
ue?enot
rct i.ncluded
i.n the
the attd
wvld tra1.n1ng
in
trcining populati.on
WryLation.
that
sal m on
andwild
wild coho
cohosalmon
that hatchery
hatcher yand
showed
Distribution
D
i s tri b u ti o n . Scale
S ca l e analysis
a n a lysis showed
o
(Table13)
to coded-wire
13) similar
were distributed
distributed throughout
throughout the
the Yaquina
Yaquina River
River (Table
coded-wire
similar to
were
in
cohosalmon
salmonin
Hatchery strays
were more
more abundant
than
than wild
wild coho
abundant
tag recoveries
tag
recoveries. Hatchery
strays v{ere
O
each area
the watershed
watershed.
each
areaof
of the
scale
discriminant
s a l m o nscale
o f coho
c o h osalmon
a n a l y s i sof
i s c r i m i n a n tanalysis
by d
Table
T a b l e13.
1 3 . Classification
C l a s s i f i c a t i o n by
L982.
area' 1982.
by watershed
watershed
samples
area,
tributaries by
River tributaries
YaquinaRiver
from Yaquina
col'lectedfrom
samplescollected
o
Area
Area
Tidewater
Tidewater
Yaquina
Big
i g Elk
E l k && Yaquina
Lower
L o w e rB
Yaquina
III
aquina
I I I Upper
U p p e rY
IV
Big
B
i g Elk
Elk
M p pUpper
er
29
5 22
??
13
29.s
13
20
7
21
9 20
7
2L.9
4
0
0
004
7
7 .77 10
10
1
t
II
o
II
II
aone
cone scale
trot be
be classi.fi,ed
elaei.fied.
ould not
seale sample
eanple could
o
o
L
o
Hatchery
Hatchery
Wild
H il d
accelerated
acceler ated
No
%
fioT---f
No
%
il'oT-
Hatchery
Hatchery
yearling
vear linq
No
%
frilT
-25-25-
500 0
5
.0
62
5
62.5
57
1
57.1
76
7 6 9. 9
0
0
4
4
3
3
I
1
200 5
2
.5
12
5
12.5
42
9
42.9
7
7 .77
Total
Total
44
44
32
3 ? aa
7
7
12
t2
o
and aa few
few
first observed
28 October
0ctober 1982
1982and
on 28
Coho salmon
were first
observedon
Timing.
Coho
salmonwere
Timing
'live
o
Hatcheryfish
fish strays
1983. Hatchery
strays
25 January
late as
as 25
January1983
as late
live adults
were observed
observedas
adults were
popu'lationin
and through
through much
November,
in 0ctober,
dominated
October, November,
and
much of
of
the spawning
spawningpopulation
dominatedthe
primarily composed
of
composed
wereprimarily
The
of
The hatchery
hatcherystrays
strays were
(Table 14)
14).
December
(Table
December
o
fl
year of
by Oregon
life by
0r egon
fir st year
of life
in the
the first
"accelerated"
l i b e ra te d in
smo l tsliberated
"a
c c e l e r ate d "smolts
Aqu
a-Foods
.
Aqua-Foods.
o
U
scale
s a l m o nscale
o f coho
c o h osalmon
d i s c r i m i n a n tanalysis
a n a l y s i sof
b y discriminant
T a b l e14.
C l a s s i f i c a t i o nby
1 4 . Classification
Table
per
iod,
1982.
by
time
tr ibutar ils by time period, 1982.
River tributaries
Y a q u i n aRiver
fro m Yaquina
c o l l e cte d from
ssamples
a m p l e scollected
Timeperioa
Time
period
o
fl
o
ll"ill:llill
10/29 to
11/12 to
tll26 to
to
11/26
L2lL0 to
to
12/10
12124to
to
12/24
11/11
11/25
l2/9
12/9
12123
12/23
l2/3L
12/31
Total
Total
Hatchery
ve a rli n q
yearling
Hatchery
acceler ated
accelerated
ff61------T
No
2
9
I
6
6
6
6
4
4
5.9
5.9
15.8
15.8
20.0
20.0
66.6
66
6
L7
17
38
38
1
100.0
100.0
82.3
82.3
60.5
60.5
50.0
50.0
t6.7
16
7
0
0
11.8
11.8
23.7
23.7
30.0
30.0
16.7
16
7
3
14
14
23
23
15
15
1
1
21
21
22.L
22.1
56
56
58.9
58.9
17
17
17.9
17.9
a
95
95 a
fi6i
No
0
2
9
9
9
--
3
tli Id
Wild
Total
Total
il6;---Z
No
1
1
--
3
3
31
3 1 aa
5
6
ttot be
beclaes'Efied.
elaaei.fi.ed.
cOne
auld not
4)ne scale
sanple coul4
eeale scznple
o
scale
o f scale
p u b l i c hatcheries.
a
D i s c r i m i n a nanalysis
t n a l y s i sof
h a t c h e r i e s . Discriminant
Lincoln
D i s t r i c t public
L i n c o l n District
t h a t Salmon
Salmon
p u b l i c hatcheries
i n d i c a t e dthat
h a t c h e r i e sindicated
samples
D i s t r i c t public
a t Lincoln
L i n c o l n District
c o l l e c t e dat
s a m p l e scollected
to
compared
stock compared
hatchery stock
141 accelerated
acceleratedhatchery
River
to
about 14%
Hatcherycontained
containedabout
River Hatchery
o
( Table15)
(A l se aRiver)
15) .
Hatcher y(Table
River ) Hatchery
about
F a l l Creek
C re e k(Alsea
3 X at
a t Fall
a b o u t 3%
no
contrast,
In contr
ast, no
Siletz
at SIletz
collected at
samplescollected
in scale
scale samples
accelerated
fish was
was identified
identified in
hatchery fish
acceleratedhatchery
th e
with the
ar e consistent
consistentwith
ana' lysisare
the scale
scale analysis
re su l ts of the
T h e results
H a tch e ry. The
River
R i v e r Hatchery
o
three
the three
tags at
at the
Aqua-Foods'tags
0regonAqua-Foods'
observed
recoveries of
of Oregon
in the recoveries
trends in
observedtrends
about
from about
rangedfrom
hatcheries ranged
the hatcheries
in the
stocks in
Percentagesof wild stocks
hatcheries. Percentages
hatcheries
to 18%.
10%
18fl.
10% to
O
-26-
-26-.
o
at
o f coho
c o h osalmon
s a l m o ncollected
c o l l e c t e d at
d i s c r i m i n a n tanalysis
a n a l y s i sof
b y discriminant
T a b l e15
1 5 , Classification
C l a s s i f i c a t i o nby
Table
h
a
t
c
h
e
r
i
e
s
,
1
9
8
2
.
F
a
l
'
l
C
r
e
e
k
Salmon
River,
and
Fall
Creek
hatcheries,
1982
Salmon
R i v e r , Siletz,
a
n
d
Siletz,
o
Hatchery
Hatchery
v e a r li n q
yearling
[J
Locat
i on
Location
a
River
Salmon
Salmon
River
S
iletz
Siletz
FalI Creek
Creek
Fall
mo-::---No
94
94
Lzs
125
136
136
6
677, 11
86.2
86.2
8
6.6
86.6
Hatchery
Hatchery
acceI erated
accelerated
n'o-No
20
20
0
0
1 4 .33
14
5
3.2
3.2
5
--
l.Iild
Wild
fiil---T
No
25
25
18
18
16
16
Tota'l
Total
L 7 9. 9
17
t2.4
12.4
10.2
10.2
L40
140
a
145
145 bb
157
157
a0tte scale
quld not
oecLaesi,fied
elaaai.fi'ed.
ttot be
aone
aeale 8ample
sonple could
o
bfitn eeale
trotbebe
elaseifi,ed.
sonpleecould
eouldnot
scale &mples
claesi.fi.ed
fl
Y a q u i n aR
i ve r
i n Yaguina
A b u n d a nce
Abundance
in
River
o
r
of
escapement
spawningescapement
total spawning
the total
of the
The area-under-the-curve
estimates
of
estimates of
The
area-under-the-curve
provide rough
rough
to provide
used to
surveyswere
adult coho
Yaquina River
River surveys
were used
in Yaquina
salmonin
coho salmon
YaquinaRiv
er .
in Yaquina
fish in
and wild
estimates
hatchery yand
wild fish
River
si z es of hatcher
sp a w n i n gstock
sto ck sizes
o f spawning
e
s t i m a t esof
o
156
1) there
ther e are
ar e 156
p re d i ca te don
following assumptions
assumptions:1)
the following
o n the
The
a re predicated
T
h e estimates
e s t i m a te sare
fl
( B e i d l e rand
1 9 8 0 ) ;2)
2)
N i c k e l s o n1980),
a n dNickelson
Y a g i n aRiver
R i v e r (Beidler
miles
i n Yaqina
h a b i t a t in
s a l m o nhabitat
m i l e s of
o f coho
c o h osalmon
the total
total spawning
spawning
of the
representative of
was representative
the spawning
the surveys
surveyswas
density in
in the
spawningdensity
o
than
rather than
were spawners
spawnersrather
the survey
areas were
population,
survey areas
in the
population; and
fish counted
countedin
and 3) fish
sites.
migrants
to upstream
sp a w n i n g
sites
u p stre a mspawning
m i g r a n t sto
per tainingto
AU C
to AUC
Additional
pertaining
assumptions
Additional assumptions
( 1980) . The
Theestimates
estim ates
Nickelson(1980)
B e idler and
andNickelson
estimates
b y Beidler
d e scri b e dby
a re described
e
s t i m a t esare
o
the
of the
violations of
ost violations
aximalsince
since m
derived
AUC
maximal
most
l i ke ly m
f ro m A
U Cdata
d a ta are
a re likely
d e r i v e d from
populationsizes
sizes.
tr ue population
to overestimate
o ve re sti matetrue
assumptions
tend
a
s s u m p ti o nte
s n d to
The
10.5
miles. The
in 10
292 adult
cohoin
The
5 miles
p o p u l a ti o nestimate
adu' lt coho
was292
A U Cpopulation
e sti matewas
T h e AUC
o
= 14
to determine
determine
14.86
156110.5
population
5 =
86 to
factor of
of 156/10
by aa factor
population estimate
was expanded
expandedby
estimate was
pr opor tionof
fi s h
of fish
estimatedproportion
Theestimated
p o p u 'l a ti o nof
4,339adults
adu' lts. The
o f 4,339
a
population
sp a w n i n g
o t a l spawning
a ttotal
(assumed
wild
to be
be all
all wild
to
5X (assumed
prior to
that spawned
prior
to 1 January
January was
was 95I
95% while
while 5%
spawned
that
o
to the
the
percentagesapplied
applied to
Thesepercentages
1983. These
January1983
stock)
after
after 11 January
spawned
stock) spawned
-27-27-
o
pr ior to
p o p u l a t i o nestimates
and 21.7
to 11 January
Januar yand
that 4,122
spawned
population
4,122 spawned
prior
217
i n d i ca te that
e sti ma te sindicate
o
t h e r e a f t er.
thereafter.
to 1L
the spawners
18%of
of the
spawnerprior
spr ior to
com pr ised
about18%
Since
about
fi sh comprised
S i n ce wild
w i l d fish
742wild
her y
(T a b l e 1
and 3,380
wer e742
14),
the
estimated
stock sizes
sizes were
wild and
3,380 hatc
hatchery
e e
sti matedstock
JJanuary
a n u a r y(Table
4 ), th
adults.
adults.
o
populationin
consis ted
YaquinaRiver
River consisted
in Yaquina
T h e re fo re ,the
th e total
to ta l spawning
spawningpopulation
Therefore,
( 22%)wild
The stock
stock size
size
(7 8 %)hatchery
in 1982-83.
1982- 83. The
adultsin
9 59(22%)
wild adults
a n d959
of
3 , 3 8 0(78%)
h a tch e ryand
o f 3,380
sever al
they rely
r ely on
onseveral
that they
the realization
r ealization that
w i th the
b e tempered
te mp e re d
estimates
must
with
e
s t i m a t esmu
st be
assumptions.
d a ta and
andunderlying
under lyingassumptions.
i n the
th e data
b i a se sin
unquantified
u
n q u a n t i fi e dbiases
.
Straying
rate.
Straying rate.
cohosalmon
salmon
42,694adult
adult coho
that 42,694
Ore-Aqua
records showed
showedthat
Ore-Aquarecords
an estimated
estim ated
these, an
1982. Of
0f these,
in 1982.
faci' lity in
Bayfacility
r e c o ve re dat
Y a q u i n aBay
th e Yaquina
were
w
e r e recovered
a t the
the estimated
estimated
(+ SOS)
Therefore, the
1983). Therefore,
L,'1,29(+
1,129
565) were
were wild
wild spawners
spawners (Cunmings
(Cumings 1983).
River .
Y aquinaRiver.
i n the
th e Yaquina
ra te was
8 X in
straying
s t r a y i n g rate
w a s8%
possibleto
to calculate
calculate
not possible
wasnot
It
It was
anoverall
over all
or an
dr ainages
to nearby
near bydrainages
similar
or
cohoto
0 re - Aquacoho
ra te s of
o f Ore-Aqua
s i m i l a r straying
stra yi n g rates
the hatchery.
hatchery.
outside the
to all
areasoutside
straying
rate to
a'll areas
straying rate
DISCUSSION
DISCUSSION
the range
r ange
fell within
within the
salmonfell
p e a kcount
fall chinook
The
chinooksalmon
adult fall
o f adult
T h e average
co u n t of
a ve ra g epeak
r ecor dhigh
hi gh
Therecord
( 67.9 to
81.5 adults/mile).
adults/mile) . The
to 81.5
off counts
1 977(67.9
o
c o u n tsexperienced
e xp e ri e n ce since
dsi n ce 1977
goals
escapement
and escapement
healthy and
are healthy
counts
years suggest
goals
the stocks
stocks are
suggestthe
recent years
counts in
in recent
pr oduction. The
r elatively stable
st abl e
The relatively
full natural
natur al production.
to achieve
a ch i e vefull
have
b e enattained
h a v ebeen
a tta i n e d to
attained maximum
have attained
the stocks
stocks have
peak counts
peak
may indicate the
maximum
1977may
counts since
since 1977
rivers.
coastal rivers.
mostcoastal
in most
sustainable
of
in
spawners
nurnbers
of spawners
sustainable numbers
peakcount
of
count of
The
The peak
peakcounts
counts
range of
of peak
the range
jack fall
within the
was within
jack
1981and
and was
over 1981
fal1 chinook
improvedover
chinook improved
the 1980
1980brood
br ood
jack count
of the
sur vival of
indicates survival
ye a rs. The
count indicates
T h e jack
i n recent
re ce n t years.
obtained
o
b t a i n e din
good.
r e l a ti ve l y good.
was
w a srelatively
-28-28-
o
fisher ies from
fr om southeastern
to fisheries
southeaste r n
contr ibute to
Oregon
fa l l chinook
ch i n ookcontribute
0 r e go ncoastal
co a sta 'tfall
o
two m
ajor
divided into
into two
be divided
can be
The stocks
major
stocks can
Al
a s k ato
C a l i fo rn i a . The
t o central
ce n tra l California.
Alaska
fisher ies.
in ocean
oceanfisheries.
of catch
catchin
p r o d u c t i o nunits
distr ibut' ion of
th e i r distribution
o n their
production
b a se don
u n i ts based
p r i m a r i l y ccontribute
l a s k a na
o A
nd
o n t r i b u t etto
a l l cchinook
h i n o o kprimarily
Northern
Alaskan
and
c o a s t a l ffall
a n dcentral
c e n t r a l coastal
N o r t h e r nand
a
p r i m a r i l ycontribute
contribute
s t o c k sprimarily
0 r e g o nstocks
w h i ' l esouthern
s o u t h e r nOregon
British
fai s h e r i e s while
B
r i t i s h Columbia
C o l u m b i fisheries
fi sh er ies.
t o Oregon
a n dCalifornia
C a l i fo rn i a fisheries.
0 r e g o nand
to
gover nthe
harv es t
the harvest
r egulationsgovern
Different
Differ ent regulations
the escapement
escapem ent
p roductionunit
m ayinfluence
influencethe
wtr ichmay
unit which
ma j o rproduction
of
fro m each
e a chmajor
c h i n o o kfrom
o f chinook
o
p r o d u cti o nunits.
u n i ts.
i n tthe
h e production
in
peakcounts
heavily
ar e heavily
countsare
The
coastal peak
T
h e average
aver agecoastal
pr oductionunit.
unit.
nor ther nproduction
i n the
th e northern
byy surveys
su rve ysin
iinfluenced
n f l u e n c edb
in the
the southern
souther n
Tr
endsin
Trends
vey sand
berof
p
r o d u c t io nunit
production
difficult
to assess
assess due
due to
to the
the small
small num
number
of sur
surveys
and
i ffi cu l t to
a re d
u n i t are
o
the
in the
wer eauthorized
author izedin
fundswere
No additional
additional funds
i n d e xstreams.
stre a ms, No
i n index
e r r a t i c counts
co u n tsin
erratic
in either
salmonin
1983-85
to improve
surveys for
for chinook
chinook salmon
either major
major
improvethe surveys
bienniumto
1983-85biennium
p
r o d u c t i o nunit.
unit.
production
o
distinct
1982was
wasaa distinct
in 1982
salmonin
cohosalmon
The
of adult
adult coho
escapement
The average
averageescapement
wasaa
escapement
was
improvedescapement
The improved
1979. The
since 1979.
col lected since
improvement over
over indexes
indexescollected
improvement
spor t
and sport
tr ol' l and
on ocean
oceantroll
im posedon
reflection
re str ictions imposed
th e severe
se ve rerestrictions
r e f l e c t i on of
o f the
o
the
despite
the
Howeverdespite
'
Council. However,
Management
F 'i sher yManagement
P a ci fi c Fishery
fisheries
Council.
th e Pacific
b y the
f i s h e r i e s by
hi ev e
index failed
spawningindex
improvement
escapements
in
the spawning
failed to
to ac
achieve
L982,the
in 1982,
sca p e ments
adult e
i nt adult
i m p r o v e me nin
goal
T h einterim
i n t e r i m goal
( a b o u t170,000
a d u l t s ) . The
1 7 0 , 0 0 0adults).
g o a l of
1 9 . 7 adults/mile
a d u l t s / m i l e(about
the
o f 19.7
t h e interim
i n t e r i m goal
o
1987in
in
by 1987
adults by
200,000adults
an optimum
optimumlevel of 200,000
a ch i e vean
to ultimately
u l ti ma te l y achieve
was
s e t to
w a sset
(0DFl,l
1982).
Plan (ODFW
Management
the
Plan
1982).
the Coho
CohoSalmon
SalmonManagement
Stray coho
coho salmon
salmon from
from private
private hatcheries
hatcheries and
and returns
returns from
from offstation
offstation
Stray
o
peakcounts
in certain
cer tain
countsin
p robablyinflate
the peak
inflate the
presmolt
p r e s m o l tand
re l e a se sprobably
a n dsmolt
smo l t releases
is unknown
unknown
influence is
of influence
The degree
degreeof
located. The
are located.
areasare
watersheds
index areas
whereindex
watershedswhere
co as tal
in
in coastal
ents
which
of wild
wild fish
fish escapem
escapements
analysis of
stra i g h tfo rwar danalysis
a n y straightforward
h amp e rsany
w
h i c h hampers
o
the
gener allyoverlapped
over lappedthe
pr ivate hatcheries
hatcher iesgenerally
from
fro m private
S tra y spawners
sp a w n e rs
streams.
s t r e a m s. Stray
R i v er
YaquinaRiver
the Yaquina
fish spawners
spawner in
sin the
wild fish
temporal
of wild
d i stri b u tion of
a n d spatial
sp a ti a 'l distribution
t e m p o r aland
-29-29-
O
( Nicholaset
year s (Nicholas
p re vi o us22 years
1982;Nicholas
Nicholasand
and
et a].
al. 1982;
in 1
9 8 2as
in
1982
a s well
th e previous
w e l l as
a s the
o
hatcher y- influenc ed
density in
in hatchery-influenced
tota' l spawning
spawning
Va nDyke
D y k e1982).
density
1 9 8 2 ). The
T h eaverage
a ve ra g etotal
Van
to be
be
in streams
believed to
lar ger than
than in
str eam sbelieved
streams
s t r e a m swas
wa sabout
a b o u t4 adults/mile
a d u 'l ts/milelarger
index units
units
of all
all index
a compilation
com pilationof
r e s t r i c t e d to
b asedon
restricted
based
on a
to wild
w i l d spawners
sp a w n e rs
o
total
in total
( s t a n d a r dand
differ ential in
The differential
1982. The
in 1982.
n o n sta n d a rdsurveyed
su
) rveyedin
a n d nonstandard)
(standard
frun hatchery
hatchery
returns from
and returns
hatchery strays
strays and
by hatchery
be influenced
inf'luencedby
spawners
may be
spawnersmay
( i.e. the
str eam s
the hatchery-influenced
hatcher y- influenced
factor s (i.e.
n o n re l a tedfactors
transplants
streams
t r a n s p l a n ts or
o th e r nonrelated
o r other
o
alone) .
p ro d u ctivethan
stocks alone).
with wild
wild stocks
than streams
str eam swith
may
more
reproductive
m
a ybe
b e inherently
i n h e re n tl y mo
wild were
wer e
as wild
class' ified as
p e a kcounts
index units
units classified
in index
The
T h e peak
co h osalmon
s almonin
co u n tsof
o f coho
and
all standard
streamswhen
in hatchery-influenced
larger
than peak
peak counts
counts in
hatchery-influenced streams
when all
standard and
Iarger than
o
spawners
of spawners
total estimates
estimatesof
In contrast, total
r{erecombined.
combined. In
nonstandard
indexeswere
nonstandard indexes
true.
the opposite
wastrue.
oppositewas
indicated the
AUCdata
data indicated
in
two strata
from AUC
in the two
strata from
The
The
fi s h
index units
units with
of index
influence of
ue to the
difference
thought
bee d
due
the influence
with wild
wild fish
i s th
o u g h t to b
d
i f f e r e n ce is
t
than
m uchlarger
lar ger than
tr aditionally much
fish are
ar e traditionally
of wild
wild fish
where
counts
a k e ssystems
h e reco
u n tsof
iin
n llake
yste msw
qualified for
for AUC
not qualified
havenot
The
lake systems
AUC
system shave
in' lake
i v e r systems.
h e indexes
i n d e xesin
iin
n rriver
syste ms. T
peakcounts
surveys.
nonstandard
for nonstandard
countsfor
estimates but
surveys.
in peak
but were
includedin
estimates
were included
o
T hi s
1982. This
in 1982.
TillamookBay
Bayin
at Tillamook
excellent at
The
was
wasexcellent
T
h e chum
e sca p e ment
ch u msalmon
sa l mo nescapement
at
surveyedat
streamssurveyed
peak counts
in all
a'll streams
counts obtained
was reflected in
obtained in
large peak
in the large
was
the
appr oached
also approached
the
Coal Creek
Cr eekalso
trappedin
in Coal
B a y. Chum
C h u msalmon
sa l mo ntrapped
T
i l l a m o okBay.
Tillamook
o
in the
the
obtainedin
wer eobtained
r esults were
Similar results
1978. Similar
i n 1978.
n u mb ecounted
co
r u n te din
record-high
r e c o r d - h i g hnumber
prime spawning
in
spawninghabit'at
Nestucca River, although
was denied
denied to
to the
the prime
habitat in
accesswas
although access
Nestucca
4- year -ol d
that 4-year-old
indicatedthat
Scalesamples
samplesindicated
C l e a r Creek.
C reek. Scale
.2 mi
l e of
o f Clear
0.2
mile
tthe
h e lower
lower0
a
1982.
year dominated
runsin
in 1982.
the runs
dominated
chum
the
broodyear
1978brood
from the
the 1978
salmonfrom
chumsalmon
o
a
-30-30-
.
o
Hatchery
Hatchery strays
from 0regon
Oregon Aqua-Foods
Aqua-Foods comprised
comprised a
proportion
a significant
significant proportion
strays from
o
off tthe
stocks
the straying
h e spawning
YaquinaRiver.
River . Although
Althoughthe
str ay i ng
o
co h osalmon
salmonin
in Yaquina
s pa w n i n g
sto cks of
o f coho
ro vi ded78%
natur ally spawning
was
8%,
provided
78% of the naturally
coho
rrate
ate w
adult coho
a sabout
spawningadult
a b o u t8
%, this
th i s p
er y
icaldominance
Yaquina
River
because
of the large
numerical
dominance of
of hatch
hatchery
in Y
a q u i n aR
i ve r b
e ca u seof
lar ge numer
ssalmon
a l m o nin
o
the recovery
recoveryof
of coded-wire
coded-wire
fish
analysesand
and the
fish returning
returning to
to the
the system.
system. Scale
Scale analyses
Aqua-Foods
have also
also
from Oregon
0regonAqua-Foods
tags
have
tags indicate
hatchery fish
fish strays
indicate that hatchery
strays from
dr a' inage s . AA
mingled
stocks
stocks in
in other
other coastal
coastal drainages.
h a tch e ryspawning
spawning
m i n g l e dwith
wi th wild
w i l d and
a n dhatchery
o
r elea s es
p ro p o rti o nof
fish releases
acceler atedfish
relatively
r e l a t i v e l y high
fr om hatchery
hatcher yaccelerated
h i g h proportion
o f strays
str ays from
possib' lelong-term
affects of
of
long- ter maffects
Hatcher y. The
The possible
was
i d e n ti fi e d at
w a sidentified
a t Salmon
S a l mo River
nR i ve r Hatchery.
potential
genetic theories
theories suggest
suggestaa potential
these strays
but
genetic
these
but contemporary
contemporary
strays are
are unknown
unknown
o
(yi eld) of
mayoccur.
stocksmay
occur .
stocks
the impacted
impacted
h e "productivity"
of the
lloss
o s s in
i n tthe
" p ro d u cti vi ty" (yield)
o
o
o
o
e
--3131-
o
REFERENCES
REFERENCES
o
An
the Oregon
0r egon
1980
N i cke l son. 1980.
An evaluation
evaluationof
of the
Beidler,
M ',|.
and
E . Nickelson
Be i d l e r , Wl {.1
a n dTT .E
Department
of
Fish
Wildlife
standard dspawning
fish sur
survey
system for
for
D
e pa rtme no
tf F
i sh and
a n d }'l
ildlife standar
spawningfish
vey system
o
l,li'ldlife, Information
Fish and
and Wildlife,
Information Reports
Reports
coho
0regonDepartment
Departmentof Fish
cohosalmon
salmon. Oregon
(Fish) B
(Fish)
80-9,
P o r t l a n d ,Oregon,
U
0 - 9 , Portland,
O r e g o nUSA
, SA.
1.974
in coastal
coastal watersheds,
water sheds,1974
Berry,
L . 1975
S p a w n i n salmon
g
s alm onsurveys
sur veysin
Be r r y , RR .L
1 9 7 5 . Spawning
o
( Fish) 75-4,
75- 4,
Infor m ationReports
Repor ts(Fish)
Oregon
ttildlife, Information
D e p a rtme nof
otf Fish
F i sh and
0 r e g o nDepartment
and Wildlife,
Portland,
USA.
Po r tl a n d , Oregon,
0 re g o n ,USA.
Fish
off
i s h Conuiission
o
0regon. F
Connission
Cleaver,
1951
F i s h e r i e sstatistics
o f Oregon
9 5 1 , . Fisheries
s t a t i s t i c s of
C l e a v e r ,FF .CC . 1
o
Por tland, Oregon,
0r egon,USA
USA.
Oregon,
0 r e go n ,Contribution
C o n tri b u ti o nNo
N o . 16,
16, Portland,
Cumings,
EE .
C u n m i n gs,
surveys
L976.
coastal watersheds,
water sheds,1976
1977
in coastal
L 9 7 7 . Spawning
S p a w n i nfish
fish
g
sur veysin
Por tl and,
Repor t, Portland,
Fish Management
M anagement
Oregon
Report,
tlildlife, Fish
D e p a rtme nof
ot f Fish
F i sh and
andWildlife,
0 r e go nDepartment
o
Oregon,
O r e g o n ,USA
USA.
Curmiings,
T
E .
T .E
C u n m i n g s,
Oregon
Depa r tm ent
in Oregon
0r egon. 0r
egonDepartment
Private
ri va te salmon
hatcher iesin
1983
1983. P
salmonhatcheries
( F i s h ) 82-10,
P o r t l a n d ,Oregon,
0regon,
8 2 - 1 0 , Portland,
off F
Fish
Reports
e p o r t s(Fish)
. t i l d l i f e , Information
I n f o r m a t i o nR
i s h and
a n d lWildlife,
o
o
USA
U SA .
to and
and
salmonto
adult coho
cohosalmon
Van
a nDyke
1982. Straying
Str aying of adult
Nicholas,
D yke. 1982
a n dLL . V
N i c h o l a s , JJ.lW.l . and
Oregon Department
of
Department
of
private hatchery
Bay, Oregon
0regon. 0regon
from
YaquinaBay,
hatchery at
at Yaquina
from aa private
o
( Fish) 82-10,
Or egon,
Por t' land,Oregon,
82- 10,Portland,
Fish
Repor ts(Fish)
In fo rmationReports
F i s h and
a n dWildlife,
l {i 1 d li fe , Information
USA
U SA .
by
1982
Lg82. Straying
Str aying by
Buckm an.
C Buckman
V a nDyke,
D yke ,and
,
L
L . Van
andRR.C.
Nicholas,
W f.,
N i c h o l a s,JJ.h
.o
0regon
0regon. Oregon
YaquinaBay,
Bay, Oregon
hatchery-reared
in Yaquina
released in
coho salmon
salmonreleased
hatchery-rearedcoho
( Fish) 82-6,
82- 6,
Repor ts(Fish)
Infor mationReports
Department
F i sh and
a n d Wildlife,
tl i ldlife, Information
O e p a rtme nof
otf Fish
Portland,
P o r t l a n d ,Oregon,
0 r e g o nUSA
,U S A .
o
o
-32-32-
o
r.
} lildlife.
Oregon
O r e g o nDepartment
F i sh and
a n dWildlife
D e p a rtme nof
ot f Fish
o
plan for
for
plan
1982
Com pr ehensive
L982. Comprehensive
trout.
and trout
production
management of Oregon's
salmon
production and
0regon's anadromous
anadromous
salmonand
and management
II
II.
p l a n , Portland,
USA.
P o r t l a n d ,Oregon,
Coho
0 r e g o n ,USA
C o h osalmon
s a l m o nplan,
salmon
egg collection
collection.
Sams,
1980
S a m s R,R .0D. 1
9 8 0 . Chum
Chum
sa l monegg
.
o
Part
Part
Fish and
Oregon
of
Depar tment
of Fish
and
0r egonDepartment
F i nal
10790049,
Contr act10790049,
Wildlife,
Contract
Final
RegionalCommission
Com m ission
P a ci fi c Northwest
N o rth westRegional
l ' l i l d l i fe , Pacific
Report,
Oregon,
USA.
R e p o rt, Portland,
P o rtl a n d , Ore
g o n,USA
o
o
o
j
o
o
o
o
-33-33-
4
o
Appendix
A
p p e n d i xAA
a
Standardand
Nonstandard
Peak
in
in Standard
and Nonstandard
ChinookSalmon
Sa'lmon
Fall Chinook
PeakCounts
Countsof Fall
Distr ict and
River Basins
Basins
Index
Streams
Stratified
andRiver
by Fishery
F' isher yDistrict
In d e x S
tra ti fied by
tre a msS
o
U
Appendix
Tables
Explanation
in
in Appendix
Tables
E xp l a n a ti onof
Columns
of Columns
in the
ata.
Surr .--the
number
of
surveys
the str
strata
inc' ludedin
i n d i vi dual sur
veysincluded
No
N o . Su
- -th e n
u mb eo
r f individual
o
t h e strata
Miles--miles
M i l e s - - m i l e ssurveyed
i n the
strata.
s u r v e y e din
the strata
str ata.
Times
--number
made
adewithin
within the
sur veysm
T i m e sSur
Su r.--n
u mb eof
or f actual
a ctu a l surveys
o
o
the strata
str ata.
Total
total
miles
within the
les surveyed
sur veyedwithin
M ile s--cu mu 'l a ti ve
to ta 'l mi
T
o t a l Miles--cumulative
the
individual
sur veys
For
multiple
F o r mu
i t is
i s the
the sum
sumof
of the individual surveys
l ti p l e surveys,
su rve ys,it
times
times the
the frequency
frequencysurveyed
surveyed.
Peak
P e a kCounts
C o u n ts
-
given survey
survey.
1982
combined
on aa given
deadsalmon
salmonseen
seenon
live and
and dead
1982Peak--maximum
Peak--maximum
combinedlive
I
fish/m ile count.
count.
Per
as
as aa fish/mile
P e r Mile--peak
M i l e - -p e a kcount
co u n texpressed
e xp re ssed
peakcount
observed.
wasobserved.
Date--date
the peak
countwas
the survey
whenthe
Date--dateof
surveywhen
of the
o
pr eviousyear.
year .
the previous
dur ingthe
1981
the survey
sur veyduring
in the
Pe ak--p e acount
co
k u n t obtained
o b ta i n edin
1
9 8 1Peak--peak
(A U C )
Estimated
R u nSize
E s t i m a t e dRun
S i ze (AUC)
o
(AUCestimates
estimates
curve (AUC
Sur.--the number
for area-under-the
area-under-thecurve
used for
numberof surveys
surveys used
within
t h e strata.
strata.
w i t h i n the
'in
given
a given
that spawned
Run
in a
spawned
salmonthat
numberof salmon
total estimated
RunSize--the
Size--the total
estimatednumber
survey.
survey.
given
in aa given
that spawned
spawned
Per
in
fish/m ile that
numberof fish/mile
Per Mile--the total
total estimated
estimatednumber
o
sstrata.
t r a ta .
U
o
o
-34-34-
ADULTS
RUN PE
SIZE MILE
trla
zNr
!hf,
dtn+
lil t
gJt
ttlHr
o. 'l*
PER
SIZE
UN
ESTIMATED
ut
zN+
)Hl
&cta
PEAK
/8?
t81
DATE
13 11/
JACKS
13
13
13
13
m
d
d d
d
13
13
13
S4S
m b
: d
d
i.A
€
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osa
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d
/2
iqai
1
12 PER
n n
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6
\
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6
70
70
70
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70
7.0
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ea6oa
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tu4a
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PEAK MILE
*4S
oo
F
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TOTAL
MILES
trj
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EH
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t
t
d)lr
<t
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io-1
TIMES
NO.
SU
SUR MILES
102-83 SPAWNING GROUND SURVEY
>u
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H
I
l6
a
*
ADULTS
:!
!
l)t/1
ASTORIA FISHERIES DISTRICT
CHINOOK SALMON
o
SUMMARY
a
I
*
r
t
aa
PEAK COUNTS (LIVE ANC DEAD)
.
o
I
g+
=r a
t"a*
Fr
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ui
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cf.
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+
SUR SIZE MILE
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^a
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o
a a . a a a t a a a
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ASTIQLA DISTPICT
STANDA'O SUPVEVS
tW9 STA' APD SURVEYS
HATCHERY INFLUE'ED
NO HATCHERY INFLUENCE
tuu
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STANDARD SUPVEYS
HON STAP;3A3 SUVEYS
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3
11/11/52
PEAK
1981
DATE
d
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Db
NN
NN
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223
107
89
10
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Appendix
AppendixBB
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Salmonin
in Standard
Standard
Peak
Density of Coho
SpawningDensity
CohoSalmon
EstimatedSpawning
PeakCounts
Countsand
and Estimated
Distr
ict
River
and
Nonstandard
Index
by Fishery
Fisher yDistrict and
andRiver
S treamsStratified
Str atified by
n sta n d a rd
In d e x Streams
a n d No
Basins
Basi ns
o
Tables
Appendix
Explanation
in
Tables
in Appendix
Colum ns
of Columns
E xp l a n a ti o nof
.
o
the strata.
str ata.
No.
includedin
in the
i n d i vi dual surveys
sur veysincluded
or f individual
N o . Sur.--the
Su r . - -th e number
n u mb eof
Miles--miles
t h e strata.
M i l e s - - m i l e ssurveyed
strata.
s u r v e y e in
di n the
the strata.
str ata.
Time
made within the
a ctu a l surveys
sur veysmade
T i m eSur.--number
Su r .--n u mb eof
or f actual
o
str ata.
Total
miles
the strata.
to ta l mi
les surveyed
sur veyedwithin
within the
T o t a l Miles--cumulative
l ' l ile s--cu mual ti ve total
veys
For
multiple
individual sur
surveys
i s the sum
sumof the individual
i t is
F
o r mu
l ti p l e surveys,
su rve ys, it
surveyed.
times
times the
the frequency
freguencysurveyed.
PeakCounts
Peak
Counts
o
givensurvey.
survey.
onaa given
1982
combined
live
seenon
deadsalmon
live and
anddead
salmonseen
Peak--maximum
1982Peak--maximum
combined
count.
fish/mile count.
Per
as
as aa fish/mile
Pe r Mile--peak
M i l e - -p e a kcount
co u n texpressed
e xp re ssed
peakcount
wasobserved.
observed.
Date--date
the peak
countwas
whenthe
Date--dateof
of the
the survey
surveywhen
o
pr eviousyear.
year ,
the previous
dur ingthe
1981
the survey
in the
sur veyduring
P e ak--p e acount
k u n tobtained
o b ta i n e din
1
9 8 1Peak--peak
co
Estimated
Run Size
Size (AUC)
(AU1
Estimated
Run
o
(AUC)estimates
estimates
curve (AUC)
Sur.--the
of
for area-under-the
area-under-thecurve
usedfor
number
surveysused
Sur.--the number
of surveys
within
within the
the strata.
strata.
given
in aa given
that spawned
Run
of salmon
in
spawned
salmonthat
number
RunSize--the
tota'l estimated
estimatednumber
Size--thetotal
survey.
survey.
o
in a
spawned
Per Mile--the
Mile--the total estimated
estimated number
number of
of ffish/mile
that spawned
in
a given
given
ish/m i' le that
Per
strata.
strata.
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APPENDIX
APPENDIX
CC
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PeakCounts
Peak
in
Index
Countsof Chum
Sa'lmon
in Standard
Standardand
and Nonstandard
Nonstandard
Index Streams
Streams
ChumSalmon
F i s h e r yDistrict
Stratified
b y Fishery
D i s t r i c t and
R i v e rBasins
Basins
S t r a t i f i e d by
a n dRiver
o
Tab' les
Explanation
Tables
E xp la n a ti o nof
Columnsin
in Appendix
Appendix
of Columns
in the
the strata.
No.
N o . Sur.--the
Su r .--th e number
n u mb eof
i n d i vidual surveys
sur veysincluded
includedin
str ata.
or f individual
o
Miles--miles
t h e strata.
M i l e s - - m i l e ssurveyed
s u r v e y e in
di n the
strata.
the strata.
Times
within
made
str ata.
T i m e sSur.--number
S u r.--n u mb eof
or f actual
a ctu a l surveys
sur veysmade
within the
o
t h e strata.
Total
strata.
M i l e s - - c u m u l a t i vtotal
teo t a l miles
m i l e s surveyed
s u r v e y e dwithin
w i t h i n the
T
o t a l Miles--cumulative
For
F o r multiple
the sum
the individual
individual surveys
sur veys
mu l ti p l e surveys,
i t is
i s the
sumof the
su rve ys,it
frequencysurveyed.
times
times the
the frequency
surveyed.
Peak
Pe a kCounts
C o u n ts
a
givensurvey.
survey.
1982 Peak--maximum
combined
Peak--maximum
deadsalmon
seenon
on aa given
1982
live and
anddead
salmonseen
combinedlive
Pe
fish/mile count.
count.
Perr M
Mile--peak
as
i l e --p e a kcount
co u n t expressed
e xp re ssed
as aa fish/mile
peakcount
Date--date
wasobserved.
observed.
Date--dateof
the survey
whenthe
the peak
countwas
of the
surveywhen
o
year .
pr eviousyear.
the previous
dur ingthe
1981
Pe ak--p e acount
k u n t obtained
in the
the survey
sur veyduring
1
9 8 1Peak--peak
o b ta i n edin
co
(A U C )
Estimated
Es
t i m a t e dRun
R u nSize
S i ze (AUC)
o
(AUC)estimates
estimates
curve (AUC)
Sur.--the number
for area-under-the
area-under-thecurve
numberof
usedfor
of surveys
surveysused
withinthe
w i t h i n t h estrata.
strata.
given
in aa given
that spawned
Run
in
spawned
numberof salmon
salmonthat
RunSize--the
total estimated
Size--the total
estimatednumber
survey.
s u r v e y.
o
given
in aa given
spawned
Per
Mile--the
estimated
number
that spawned
in
P
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