FLSB COI+QELOSI O N OF' (i.F;ZGOB
COP24KH.CII-L F Z S a i I E S .lUSEl\nCh AND 3355'31:0P?mT ACT
Prepared by:
Approved 3y:
Hsbcrt L. Demary, A q u t i c B i o l o g i s t
Jack M. Vaa Zyning, Pkriuae Research S u p e w i s o r
U. 3. Department of h-atexior
Fish a
n
l
d Wildli.r'e Ssr-vice
.-
D.~-aaausf Comercia1 r'islaezies
&
Sv.bpsoj ee b
.-.
P!CJ. 21 -4.-R-2
Csntza,c%Mo. 3 4-1 7-0097-4.78
MSTMCT
L
The maket sampling progran for Dov[~s,-lish,
and petmle eole, and
Pacific ocean gsrch continued. Idarket conditions severely liaited.%andings
during ' h e last qwrter.
A Cover sole cxuiae was completed in 14~1.y~ h t a from t h e July 9966 Dover
sole cruise plus data from two shrimp cmdses ( ~ ~ t o b e s - ~ o v m b1966
e x and 3l3zchApril 1967) are prssented to ehow depth cBistri'butiorm oP Dover esle with
emphasis on juveniles.
The technique for ag51ra,~Dover sole 3y %he ~lcalemethcd is cs~plete.
Hestalts of this study 8x8 preze~ted. A publiceticn is being pzegaxed desc~ibirg
%he zging %ecWques.
Six additional cstliaes were n3de cjn Pacific ocean. perch. Bit& from theee
cruises were used bx the American delegation at f i a h e q talks with the USSR.
IXarirg the year the following reports were submitted:
Quarterly progress reports:
July 1, 4 3 6 6 - ~ e p t e ~ b e 30,
r
1966
October 1 , 1966-December 35 , 4 956
Amm1 progress report:
Cruise repor%s: 66-2
July 1 , 3966-J1me
30, 1967
Sbz1bp cruise, phase B-fish
66-5 Pacific ocean perch survey
46-6 Pacific
0cea.n perch sur-Jey
66-7 Dover sole cruise
66-8, Y p l o s 11 Pacific oceaa perch surveys
Xnvesti~.aLionalreport No. 6, k~ch-frequen6;yand age-I.w~+$-i-f~equencydis-
tsibu%ions for Dover sole,
sole, ptrale sole, a n d
Pacific o c a m perch landed in Qregon, 19.4845.
April 1967
A short talk covering the ?lover sols inves%iga$ion w a ~given before members
of the fiskring industry and ethers in Jenmzy 4967.
PROGRESS
F&SE
Activities d u r i n g fiscal year 1966-67 were i n four r o a h areas:
(I)
market s a p l i n g ; (2) final development of the scale agi= method f ai-Dover
sole; (3) research cmiseg; and (4) Pacif%c stem perch %w.veys.
SrnLHP*fG
3-
Durj,~&the 2bml j r e a m k e % aampliq: ~om2inuedat the level setabllwhed
at the bsgdnniw of %he progmn in 1966. Pacific ocean psrch yere added t o
the s q l i n g p r o g m .
Sample size
$8:
k v e r , 4OQ scales psr month; English,
150 intezoperculae per rooxkh; ge%m3e,200 s%olithsper month; and Pacific
ocean perch, 400 otsliths per month,
FiaL- s a p l e d at B&aria and Coos 3a.y
from July 1, 1966 to June 15, 1967 a r e sh~wnin Table 7 .
. Nu~loer~mof f i s h s m p l e d Staring ficcal year 1967.
Table 1
Dover
k-
Cooe Bay
Totd
30
~etiale
.-1ish
971
200
370
1$450
Pacific
ocean perch
--
400
1,753
3 9 247
SCALE T~LQHOD FOR AGUfG DOVER SOU
Fa3.y in the p r o g w
3.
aging Dover sole bx aoalee.
study was mdes-&&en - 8 ; ~develop a %ec%w$que f o r
'The study w a ~a?ndest&en b e ~ s m ee s d e s of tagged
f i s h at liberty 10 years indicated age a% taggeng of 3-5 years for f i s h w h i s h .
had been tagged as rnhxre a d d i s .
(1
Tho dbssrct.pm~ycould be due
$0
two causes:
a s i n t e r p r e t e d rmxb ma tho sonleg or (2) armid.b ares.;; beZng fomed every
year
0
3*
(1) reeaa6:h cruisae vhere f i n e
Scales came from two sowcea:
mesh net5
--were used, an& (2) market a m p l e ~ . An axtami-re col4eo-tion oP o c s l e s from
ju7~cniLeEieh wcau mde from sexreral cnsBaes over a period of a ye&;,-.
!!%is
made it possible t o observe s c a l e powth mdl mmulua fsm,%isn oves a full
year,
~-uve?ileswere callee+:ed in %rchP J d y , Oc%obezo =d November 1966
.and J a ' ~ v i q y1947.
Table 2
R J ~ O V Bthe
average Z e w h by age f02 different months.
The relation between length d n Oc"2s3er-Xcvensabm 'to $he iflarch Benghh in the next
age groq
is nzarrly a s%saigh% line.
Since mli~kkdt:,?,-e!
nearly fwmed i r ~
October-3ovembez and were forned i n Farch i t would appmr $ k t t a e annuli
were -i;rue y e a r m a r k s and
lclg-bh of 6.6 em.
tb4i
the first a~auluaif fomed
This is contrary t o
first ~ u l u iss a false annulus.
b g e m b
k r c h at a mean
( 1 9 5 2 ) %rhostates that %he
Since Eage-mmqs age-2.eng%h &
:
a
a r e based
on stol5.kh readings these is no direct ~ornparihpon~
bwt l - x e t ~fieh
~
by his
1-.-
me-Fnod
18.6 sa in length.
Basording t o a=
data f i s h of t h i ~Len&h
would be at least j years of age.
Table 2 .
Average le-wl&
i n cen%lnnetere, 0%: Daver sole of f i r s t
f o m age elaaees, collec%ed i n d i f f e r e n t ac?n%%ls3.
The s c a l e s coll.ected i n 8c'B;ober-Eovemher : ~ r a ~ e to
( i be esge~isllyi n t e r e a t i r + ~ ,
6$0$ orJy
m a the annulus, in scil?e ~ 8 8 ,,~f~mecZ,
s
bl~%
:?# secord or n-qplernentary
m u 7 . u ~was a l s o ,arese~-b.
L-
as being resorption.
the a@aLcpattern.
In e a r l i e r r e a d i ~ g sthis pattern bad been i a t e q r e t c d
T h i s is considered a brenktkzough in in%er~:rct~tionof
4*
Once a starting point i n reading; the sca2.a~was eatabbished, the next
L
s$ep was t o d e h m i n s readability a d t o eotscblish %he time of annulus
formation.
A series sf 11 market samples were selected f o r %Me.
Samples
selec$ed covered %he period April t o Dscenber by approx;fmtely 2-week periodrs.
A% the outset it ws considered h p m e % i c d $0 read scales from market samples
t h e e tines b e c a u ~ eof the t i m e involved.
It was then decdded
e r r o r of dO$ with a deviation of 2 1 year.
%Q
asce~t
To determine d e v i a k i ~ n , asales vera
read twice with %hs first reading c o n s i d ~ r e dc o :r-"inal, Y?:e socon6 rsading
used as a comparison.
C h i - s ~ w e t e a t s Indicate no ~ i g i f i ~ m
diffzrenee
t
between %he two readings o r betwean sexee;.
with no deviz-bios WELB51%.
-+- d
year tras 0%.
Qf the 1,073 soales read, agreement
Pg-reemen-b "oe%ween%!JD reedbgs wi-ch a devia$rion of
T h i s w a s eonsidered gcad apeemen$, but s l i g h t l y more than
e r r o r liai-i;hoped f o r .
the
Out of m r i o s i % y a t u r d reading ' ~ m smade on
$he nomgreement reaclii~g~~
TMa izlcrezeed agreemen% with
Deviation i s aho-&a
in Table 3.
about zero,
m9
The sMf"r;rom
30
deviation to 84%.
Note that total. deviation i s nearly symnetrLcaJ
positive deviation i n yower
fish t o ne,%tive
deviation i n older fish indicates a tendency t o over age younger fish a.nd
under age older fish.
Table 4 demonstrates annulus f o m t f o n .
marginal grow%h beyond the last am'ljllus.
%;he la&
annulus.
Also i n October, 19%
In A p r i l , 6% of the s c a l e shoved
By October, 1005 showed po*&h beyond
fof
the asales ~horqedthe new axmdus
and by P e b r q , 8
3s of the scales showed. the
a1n1hlw. Thus, a m ~ ~ u a
fozma-bion begins Li? -8;he fall and is ccmp1ete by rd.n-b;es: 02 early s p r l : ~of $he
f 01lowir-g yeax.
Soae f i e h
(@,I
were trzgged t o ge% PSL insigh-?;
i n t o ths second problen of
mnular m k s not being fomed eveq year.
tagged f i s h have been recaptwced.
4s of J w e
15, 1967, four of these
:.No f i s h were ct liberty l e s ~
thaa 60 days
April 1966
m
Y
1966
99
100
93.9
74.0
L
while the other two emre a% libsrw jut a yewo 330th fish. maptared a f t e r
3 h x h g the
p t ~@txcp
two
c-18~
were m d e far Juv&le Dmer eole.
In
measured and aexsd arnd Juved1e13p r e a ~ m e d ~bver sola .catch data from a l l
cruises were adjueted t o a M f - h o w tow.
o r u b e e of ~ u l y1966 and
The avo
oa%&
in
cars per
a967 %am we20 m d e in
L
&om the per een6 of Juvenile &ver soke eJ5 an by depth. The b t a are
Table 5.
Per cent of Dover eole 515 am k y depth ~ $ m $ (dash
a
- i r d i a t e s no fishing).
10-19
2-29
30-39
40-49
50-59
6049
709.79
8049
90-99
100-4 09
110-119
i20-1 29
130-1 39
L
49
150-1 59
160-1 69
170-1 79
No. tows
140-1
to
depth mange.
&ow
a
life Mratoq y8as.
31h P&c&
Juveniles w e o~nfined$0 a ~
$ban
Xn July,
n-ly
m
the peatest depth of occurrence ~~ beiheen 110 rilthl 'B 20
fathoms and mauhiBaiun abundance w w at $0-49 fathone.
leas
r
No
%OWB
we~s=Be
at dleptb
40 fathom but %he & ~ ~ e&a%ribu%isa
d
sf juvenile f i b hdica%es
'the depth
300 faam.
of J a v e ~ l e s
Depth of mmchm
20 fatham deeper than in July,
frm 10 t o 79 fathaam d t h
Table 6 ahowa %he p e ct2n-t
~
of Dimor sole,
E ~ ~ ~ W ~ G0%
B Ssimp &
dqtb
L
strab.
Over the dep%ba f i a b b ,
and 80-89 fathaw. The@@
&%%a
m ~ be
% deweda
so-s 9
20-29
30-39
4-49
50-59
a49
70-79
L
80-89
90-99
~oo-9~51
sso-a dg
.rra-se
130-1 59
1 4 - 1 49
9 50-1 59
160-169
1'Qooa 79
No. tm
B 06
caution einoe Dover sole
a9e
Table 7. Hean length of Dover sole mdl pep cent nn%e1ew by depth
stmb (notatfm:
=
fi~Mwj =
=@to
d = mew lengbb).
-
but 4% of thew males were judged t o be mhareBbut .size of f i s h at this depth
i e quite U l , avera@ng 34 cm.
During the %y
cmiee, k v e r sole a t o h e e were eamplsd for age ccmpoeition.
Per cent of the a t c h
ave
Bed by depth iaa%emP
1
s t o 10&.
per cent w e ~anpoeition& depth strata is shown in %'able 8 .
!
m
a
The mmkr
of age claaess caught per depth in%e
range in age o c o ~ e d
a$ the 50-59 i'a%bmstrata eAendhg from 5 to 17 ysase
.---
in age.
Thgse
data clearly dlemomt%m%e
age stmtifiaa$bsn ?qdepth wi%holder
f i s h occupying the greater depth.
Age 111 f i s h danirnsrte $he 2O-dO fathom
Percentage age compositborm of Dover eole =ugh% i n
lhy 1967e by depth &rats.
Table 8.
.I
Average
4.0
5.5
3-8
6 5
7.9
7-0
a h t a , age V fi& aomhate i n 40-70 fa%home,age
f a a m depth, andl ages BE11 am3 D
L are d
A one*
cruise
d
tkre aap%ure of 6 juveniles of %he
3.0
B%H f k h domBna%e%he 70-80
i n %he 80-90 fa%Bognstkslh.
1967. boause of fwd. wea%her,
m~ made in
only one $ow in 58 fathom
8.2
.
$yae~rn*
~simfim%
f@&i2r?z of %h%OW
yeax oleas.
-8
~ h e s efigh averagedl 6.6
.
P A C ~ I COCEAN 2BGE CRUXSES
During the yea, e i x Pacifis ocean perch cmisesa w a e made.
cruieea were mde OM
actively pWauing per&,
F o u of %he
ered veesel~sfrom the Bs%osliaflee%t k b were
The o%her %WO
regularly chartered vessel.
L
.*
Purpose of the cruises was t o fiah i n areas that
had produced good catches of peroh p 5 o r to '8964 and were fished heavily
by the Russian f l e e %in 1944,
Data from %he perch cruises wxe used for backgrowd mrs%eridby United
States representatives in fisheqg negotiations with the Sovietrs. Analysis o f
these data is contained in an
repsxt.
Eagerman, F. 33. 1952. The biology- of &he Doves sole I4icrostoms aaacificus
( ~ o c k i w o n ) Calif, Dept , Fish an& Game Fish Ball, 85, 48 p.
.
Alverson, D. L., A, T. Pmber, ma%
L. L. Ea~rzholta 1964. A study of demersal
fishes and fisheries of %he Nostheastern Pacific acean. H, B. 31~1511an
Lectures in Fisherie~, bs-&f%w&e
of Fisheries, Uniar, of Bri$ish Columbia,
Vancouver. 190 p,
Status of a%ockn or" Pacific ocean psrch off iihe eoaut of Oregon. Oregon
Yish Commission ty-pemEt%onreport, Reoearcl~9iwision, J . m ~ s y9, 8' 967.