c.r1. 1973/F:l
Administrative Report
International Council for
Exploration of the Sea
DEMERSAL FISH (NORTHERN) COMMITTEE
by A. Hylen
1972
"
Belgium
(R. De Clerck)
''lork at sea
The RV "Hinders" continued the monthly cruises off the'.
Be1gian coast on 10 stations to determine the density arid
tho composition of juvenile soles 9 plaice, dabs, flounder.s,
gad'oids, shrimps and other orgariisms.
._- '
•
The joint programme with Holland and Germany on tho nurseries
,'ras continued by tuo cruises.
1 500 p1aice were tagged off the Be1gian coast. 2 500 p~aice
",ere tagged on board the RY "Tridens" in the rl[orecambo Bay.
"lork on fish
The stock analysis by means of market sampling was continued.
Age, length, weight, sex and stage of maturity of cod, lThiting,
p1aice and sole vero determined. The areas studied are as follous
Cod : North Sen; ~nLiting : North Sea; plaice
No~th,Sea, ~nglish
Channel, Bristol Chmtnel and Irish Sea; sole : North Sea, English
Channe1, Bristol Channel and Irish Sea.
Season
No. of Fish
rlfea.sured Aged
Ho. of SamnIes
Research
I Market
Vesse1s
SampIes
_..
"
1 trim
21
15
2
3
4
8
8
10
1 trim
2
3
4
nris'Go1
Chnl1nc1
--,
-
English
i_9~~~~~
~
6
'1
200
210
280
140
960
3
602
406
4
1 trim
2
3
-
13
1 763
4
546
4
-
4
i
841
564
3
l!
295
1 trim
210
'325
130
775
13
6
~:LO
3 453
1 931
1 157
1.180
210
210
140
210
-------l--------I------+-~---_l
I -
~_~
J
~
70
_
,.
{
\\..
I
-
\\
2 ;......
-Area
,
No. or Smnplso
.1\esearch !Yla.r~e't .
'VesQele
Samplee
Season
6
8\· ....
8
6
1 trim
Plaice:
North Sea
Irish Sea
2
3
4
1 trim
2
,
...'"''
.......
, ...
1
---
4
Bristol.
Chamie1
1 trim
2
3
4
...
..
.
~
'.
1 trim
l-Ieasured Aged
24
1,
8
8
2 035
1 ,04
878
744
275
441
441
20,
6
8
5
595
620
645
254
150
140
,95
100
7
2
7
.5~4
273
523
36~
130
150
90
150
244
100
,
;. ':
..
.
English
Channe1
,
No. oE Fish
..
..
4...
'" :.'
:
,"
..
~
.'" , ..'
,
.. .
.
.
.
~----~------~-----------~-~~~~~~-~~~-~--------~~~-------~-~~-----_
.
....
.
'
Cod:
N'örth Sea
1 trim
2
,
..
,
4
,:
6
8
8
6
•
'
1 162
502
808
280
13
'
6
.
11
5
409
167
268
107
~-----------~-----------~------------~---------~~-~--------~-------
1 tr~
Whiting:. 2
North Sea
",
.;.
.
'
(
'.,
. ..... _.,;,..
....;.
• '-__ .:..;;.
...
~-
6
8
8"
6 .. __
7 .
4 ... .
.:6 "
'.__..
··f...- -..
t..~~
~
.
~-
__ -
296
274
299
311
..
--~
... '-
129
158
154
151
_
. ;
'.. . ~ .Canada .... .'. .
'(.A~:M. F1emin€) .,' "
..
"
A fu11er report on research by Canada in 1973 on demersa1 rieh species
is coritained in tbe Canadian research report to the Annual Meeting of
ICNAF, May-J~e 1973.
.
Landings of the,principa1 demersal species 'from the SW.At1antic area.
by Canada in 1972 total1ed about 470 000 metric tons, abeut 1010 below the
1971 tota1.·Tbe decline in landings resulted from a general increase in
1andings of mostor the major species. A1though some of the decrease can
be attributedto adverse weather the catch per unit ef effert is 1ewer
in m~y fisheries.because.of. the. increased e~~ort of the 1argeinternational fleets.
•
-
;
-
In 1972 intensive studies wereconducted related to international
management of fieheries in the ICNAF Convention Aren adjncentto
Cancdo.. Comprehensivo o.eoeeomente ''lore provided for the major
stocks of cod in areas from eouthern Lo.brador to tho Scotian'Shelf
(ICllAF Subares 2,3 and 4); for stocks of American plnice and
yellol1ta.il floundora from tho Grand Bank (ICHAF Subnrea ;), and
for stocks of haddock on tho Scotia.n Shelf '(Subaroa 4).
From the dato. obto.ined by theso asscssmento internationo.l catch
'quotas for 1973 ",oro recommonded by IClfAF for most of -~he major
'demersal stocks of cod, haddock and floundors in Subcroas 2,; o.nd
of IClTAF.
4
To provide data for continued aseesements an intensive programmo of
research veosel surveys and so.mpling of commercia.l ca.tcheo ,mo
carriod out (see following tables).
Asoocia.ted biological otudieo "ero continuod on vo.rious q>ecies.
Tam;ing of yollmvtail floundor on tho Grand Dank (Subarea. 3)
, ,ro.s cnrried out in October to study stock rela.tionships a.nd '
migra.tory patterns.
Intestinal helminth pa.ro.sitos of vnrious species of flounuors are
being a.soesoed as an indica.tor for flo.tfioh populations from tho
Gulf of st' Lo.wronco to tho Bay of Fundy (ICUAF Subc.reo. 4).
nooonrch vosool studieo of fish ogg o.nd lo.rvae distribution and
c.btUldc.nro o.s rolo.tod to adult demersal stocks "ere continuod in
tllO Gulf of St Lawrence. From 0. otudy of specioo o.osocia.tions on
the Gcotian Sholf difforent bo.Dic dcmerso.l o.soemb1ages ,rere
identified in different onviro.1montal habitats in the area.
An invostigo.tion of northorn sand launce (Ammo4Y~p~ ftubius)
in tho northwest Atlantic indicated tho stock consistod of
10ca1 concentrations
sandy areas on tops of offslloro banke.
Larval abundance und occasional vory largo ca.tches on tho
Scotic.n Sholf support estimates of biomass as high ns for some
comnorcially important fish.
'
in
- 4-
-
ICNAF
Division
Species
Ge ar
Quarter.
Lengths
Age
.-
July-Sept.
2668
645
Commercial
July-Sept.
1767
1968
1761
2460
252
205
187
254
"
"
"
"
2393
1621
1241
1890
10432
493
1121
272
319
7858
1393
2221
240
1991
321
2893
519
136
520
110
216
279
254
988
100
59
160
200
1070
248
300
2J
Cod
3K
P1aice
Witch
G. halibut
Cod
Gillnet
Cod
Trap
Gi1lnet
OIT
3L
"
"
"
"
"
OIT
11
11
Haddock
P1aice
"
"
"
11
Ye11owtai1
"
"
Witch
"
"
Witch
G. halibut
P1aice
"
Ye11owtai1
11
Witch
White hake
"
"
-
"
"
"
"
"
"
"
"
"
11
"
July-Sept.
Oct.-Dec.
Apr.-June
"
"
July-Sept.
Oct.-Dec.
"
11
"
11
"
Apr.-June
"
Oct.-Dec.
Apr. -Ju.'1e
July-Sept.
"
-
OIT
"
"
11
"
"
"
"
P1aice
11
"
Apr.-June
"
OIT
Ye11owtai1
"
"
Trap
OIT
"
"
"
30
"
-
11
11
3N
"
OIT
"
"
"
"
"
I
I
I
I
l
I
I
I
"
"
OIT
"
-
OIT
-
Apr.-June
11
"
Oct.-Dec.
Apr.-June
"
"
July-Sept.
Oct.-Dec.
"
"
"
"
Apr.-June
f
I
July-Sept.
Oct.-Dec.
"
"
11
"
Jan.-Mar.
July-Sept.
II
203
83
418
97
30
101
2253
354
701
5057
1557
1075
4052
1672' .
' 58'..
2
896
80
,174
460·
299
76
509
148
43
796
671
232
200
110
61
37
40
96
94
515
414
2
Type
Commercia1 I
"
Research
Commercial
11
"
"-
Research
Commercial
Research
Commercia1
"
Research
Commercial
Research
Commercial
Research
Commercia1
"
Research
Commercial
Research
"
comme_al
"
Research
Commercia1
Research
"
Commercia1
Research
11
Commercial
"
"
I
-----
r
-
- 5 -
.
"
I
IcNAF
Division
Species
Gear
Quarter
Lengths
Age
3Pn
Cod
Gillnet
Jan.-Mar.
5522
332
3Ps
Cod
OIT
Jan.-Mar.
Apr.-June
1017
2706
7633
3043
486
370
[370
39
437
3
84
173
211
406
593
212
214
427
499
781
459
273
101
(370
39
279
3
65
90
44
91
58
3649
1853
229
2489
6921
351
11
11
"
-
11
Longline
11
OIT
"
,
f"
Haddock
11
-11
"
"
Witch
11
"
4R
I
Trap
OIT
11
"
alT
-
"
-
"
P1aice
alT
Redfish
I
I
White hake
Cod
"
Redfish
"
I
4s
"
Redfish
"
Cod
-
I
-
alT
--
-
"
"
alT
Cod
-
"
11
"
"
"
Redfish
tl
"
White hake
P1aice
"
"
Witch
Ye11owtai1
Winter
f10under
alT
"
alT
-
alT
"
11
-
alT
"
"
11
11
July-Sept.
Oct.-Dec.
"
11
"
"
[.Jan.-Mar.
11
"
Oct .-Dec.
Jan.-Mar.
Oct .-Dec.
Jan.-Mar.
Oct.-Dec.
"
"
"
11
July-Sept.
Apr.-June
July-Sept.
"
"
11
"
Oct.-Dec.
July-Sept.
Oct.-Dec.
July-Sept.
Oct.-Dec.
"
11
I
I
I
I
I
I
I
I
Jan.-Mar.
Apr.-June
July-Sept.
11
I
I
II
"
Oct.-Dec.
"
"
"
"
11
11
11
11
July-Sept.
Oct.-Dec.
July-Sept.
I
i
I
;
I
i
I
i
I
I
,,
Oct.-Dec.
July-Sept. ,
"
11
"
"
1540
1339
200
200
290
Type
Commercial
Research
11
Commercial
11
Research
C::ommercial
[Research
"
Commercia1
Research
"
Commercial
Research
Commercial
Research
Commercial
-
11
Commercia1
-
"
"
-
11
183
253
-
55
57
35
238
Research
I
j
Cornmercia1
"
tl
"
Research
,
,
962
2138
2316
3345
66
655
1833
1010
1706
168·
4791
214
206
66
324
888
137
338
351
1367
66
115
80
-
230
80
1409
11
35
66
186
145
Commercial
11
"
Research
"
I
I
I
I
I
Cornmercia1
Research
Commercia1
Research
11
tl
Commercia1
11
Research
tl
"
I
I
I
!
- 6 -
ICNAF
Pivision
4Vn
Species
Cod
Haddock
White hake
Redf'ish
alT
"
OIT
Plaice
,I
"
Ye110wtail
"
I
"
I
4Vn+S
Cod
4w
Cod
..
"
"
"
'I
-
I
"
"
I
I
alT
Witch
"
Haddock
"
11
"
"
"
White hake
"
Redfish
"
"
"
"
-
alT
"
"
-
alT
"
"
"
Jan.-Mar.
Apr.-June
July-Sept.
Jan.-Mar.
-
"
"
Jan.-Mar.
Apx'.-June
Ju1Y;"'Sept.
-
alT
I
.•
"
11
"
"
,
11
alT
Haddock
Redfish
"
Jan.-Mar.
Apr.-June
July-Sept.
-
-
"
!,
"
"
11
t
"
"
"
11
-
Cod
I
Jan.-Mar.
July-Sept.
11
Plaice
I
-
alT
11
,
Quarter
-
"
4Vs
Gear
1
I
I
"
"
"
"
Apr.-June
July-Sept.
Jan.-Mar.
July-Sept •
Jan.-Mar.
Apr.-June
July-Sept.
-
Jan.-Mar.
-
Jan.-Mar.
"
"
alT
Apr·.-June
July-Sept.
Oct.-Dec.
Jan.-Mar.
alT
Apr.-June
alT
July-Sept.
Oct.-Dec.
Jan.-Mar.
July-Sept.
Apr.-June
alT
-
-
alT
"
alT
alT
Lengths·
Age
106
103
107
33
598
701
107
34
86
685
257
1534
526
986
222
604
-
I
137
224
881
1997
400
142
300
1447
317
59
189
59
100
1567
207
··Type·
Coromercia1
11
Research
"
"
Commercia1
"
Research
198
"
162
48
348
136
Commercial
-
80
142
74
710
71
59
189
59
32
451
I
.- ..
46
"
Rese=-
"
Commercia1
"
Research
Commercia1
Research
Commercia1
Research
COIl'l.mercial
Research
"
"
Commercial
Research
Commercial
I
"
"
"
"
"
"
"
"
"
"
July-Sept.
682
270
44
679
1270
801
1170
186
338
115
440
39
51
116
441
1160
1141
!
I
1
I
I
1
i
!I
J
103
103
42
439
199
642
190
186
30
109
65
-
-
-
co~a1
Res
"
"
Commercia1
Research
Commercial
Research
Commercial
Research
Commercia]
Research
"
"
Commercia]
"
Research
-
- 1.. -
..
ICNAF
Division
Species
Ge ar
Quarter
Lengths
OIT
Jan.-Har.
Apr.-June
July-Sept.
J an •- Mar •
Apr.-June
July-Sept.
Oct.-Dec.
Jan. -Mar.
Apr.-June
.' July-S·ept •
412
73
734
174
100
78
200
280
149
1368
95
Type
Age
,.
4w
(cont. )
Plaice
"
>.
-. ,
11
11
11
Witch
11
.. . '
"
"
••
,""
OIT
alT
'.
"
11
Yellowtail
n
..
11
11
·11 .
'
4x
Cod
It
~
.
..
11
:
"
,.
..
..
"
:.
.. ...
~
!I
I
I
I
.
I
I
I
l
e
,
",
.~
.
... .
White hake
..
'
. : 11
11
'.
JuJy-Sept.
Oct.-Dec.
Apr.-June
.' July-S'ept •
Apf·-J\!ne
July-Sept~
Apr.-June
.__.
~
-
11
11
"
... .
11
1
"
tI
11
Pollock.
11
Apr.-June
OIT
11
..~.
Oct.~Dec.·
11
-
Redfish
"
'J~'-Se'-~t;~:j
Jan.-Mar.
alT· :
-
Cusk
1
.
alT
-
tI
11
11'
OIT
.'
"
i
I,
I
11
1,
I
Apr.-:-June
-
11.
......
-
O/T
11
tI
tI
-
Haddock
I
I
:- !
Jan.-Mar.
-
11
I
O/T
alT
\.
"
"
"
Winter f10under
,)
.....
~
alT
.
:",: .. !... "
_--_
...." ....... " .'
~
~'l
11.
.'.,....... :
....< Ott·..:'Dec.
412.,
. 73';:.,.
499
174
30
78
33
142
98
607
27
1202
83
331
360
1313
965
4230
727
1500
1008
2229
764
112
166
56
100
442
1233
254
470
794
222
'.
94
'·.96
197
80
57
358
318
240
518
349
177
1005
399
131
41
163
32
105
135
222
93
95
.' -;Research
tI
..
11
11
,.
.', :Commercia1
:Research
':'commerci al
... ~.Research
11
....
~
:
..
11
'~:l~!
,.
n
.
'
.. ~ommercial
Research
. Commercia1
, Research
.Commercial
"
"
"
Research
Commerci a.l
Research
Commercial
,'.
"
..
Research
Commercial
Research
Commercia1
"
Research
11
Commerci al
11
Research
!
P1aice ..----..
Witch
Ye11owtai1
4x-5Z
i
Cod
-
Oct .-Dec.
401
63
Cornmercial
5Z
I
Cod
-
Jan.-Mar.
July-Sept.
279
400
126
97
124
43
96
61
64
133
30
Commercia1
:
"
ii
I
I
I
11': •
1",
.
11
"
:
"
Haddock
White hake
Redfish
Plaice
\fi tch
Si1ver hake
J :.:.Apr .:-June
11
.. '.: 11 ... .
' ..
......
~
.'
:
O/T'
11
.
'
"
·11
Apr.-June
11
11
11
"\1
"
"
11
11
"
11
"
..
t
11
"
11
11
-
Research
43
96
2
"
-
"
..
.,'
11
"
- 8"-
Dcnmark.
(0. Baggc)
Plnice
In July and August quantitative
out in inshore waters.
~ishory
for.O-group plaice 'tas cnrried
In the northern Kattegat and the western BaItic the catchea lTere of
average aize. In the southern Ko.ttegat they uere above average nnd
in thc Belt Sea belOll average size.
paddock, whiting and cod
On thc "Dana ll cruiso in February nnd Harch length
otoliths uero co11ectod.
meas~ements
nnd
~
Tho sampling in lby continuod and an age-length key uas worked
out. It wns found that for otter-trawl the year class 19G8
was dominating nnd constituted 30.5% of thc total landings. For
gill-nets it was ~ound that theyear class 1968 was dominnting
. and constituted 46.5% of the total landings.
Turbot nnd bri~l
Thirty brill and· 14 turbot havc been taggod in the contra1 Kattogat.
Q2.Q;
Tngging of cod has been carried out in the Jutland Bnnk aren in
April, 1 021 individuals wore tagged. 115 cod caught on tho
Jutland Bank l'1ore trnnsplanted to the Kattegat, taggcd and rc;;'
leased Inf of Anholt.
Fodernl Republic of Gormany
(A. ~-Ioyor)
Continuation of the biologicnl studios nt ooa on research shipc
nnd factory trall1ers and at tho markets with length measuremonto,
colloction of otoliths, maturity, food and taggings.
Research trips:
January : North Sea
lbrch : lTortl1 SeD.
I-furch : Uortlegian Coast
April : Daltic Sen
Factory trawler
Fobruo.ry : NOJ::'lTOgio.n Const.
lic.y ': North Sec.
. July : Uorth Sea
October : North Sec.
November : North Sen
e·
- 9 Sampling Date.
-Area
No."of Sampleo
Season
.narl\:e'C
Vessels
SampIes
No. of Fiah
Measured Aged
Racial
Invest iga.ti on
Q@
IIa.
IIIb
1
2
1
2
3
4
1
4
1110
!Vb
!Vc
Va
I
1
1
2
3
4
i------------
--~------
I
2
2
1
2 466
2 635
551
789
313
646
454
137
198
149
-
11
1
2
3
4
20
16
16
1
2
3
1
4 514
510
589
1 178
1 577
9 641
6 553
5 917
216
434
1 054
432
3 983
510
211
386
1 159
2 588
2 362
2 156
" 216
434
711
432
17
-
725
1. 545
487
2 727
2 250
11 621
2 040
160
110
48
20
--__J _____________
I
HADDOCK
1
-
!Vb
1
19
Va
1
2
------------1----~----_.
SAITRE
!
I
!Va
Va
-3
3
3
3
-3
6
5
2
----
-
--
---
----------1------------ ------- ---------------
I
IIa
IIa
2
11
21
17
17
18
9
1
2
1
2
1
1 517
3 281
3 331
147
35
2 455
2 513
665
873
574
1 079
840
340
-3
I
8
928
663
513
190
139
200
454
191
398
125
278
945
663
4
43
4
2
I
I
I
I
Vb
1
2
1
3
1
2
3
4
1
3
4
1
--------------24
-
--
-34
--
7
-
-
--
---------- ..----------- ------- ---------------
---
--
--
-----------_.
---------1-----------------...----------1------------------------.'
VIIa
REDFISH
IIa
IVa
Va
1
1.-4
1
2
1-4
1-4
1-4
-
3
32
-
7
11
51
10
-
-
-250
§.- marinus
tt
"
It
"
§.- mentella
§.- marinus
1.._---_...
_--------_.
----------'-----------------------------------------------XIV
...
~-----------
- 10 -
Sampling Data
------.,.-------,.----------,.-------,-------,
No. or Fiah
No. or Smnp1eo
Beason
.!rea.
Research
Vesse1s
llIarke"t
Samples
~~~---------
PLAICE
IIIc
1
1
4
IVb
1
2
3
4
I
l
l
FLOUNDER
IIIc
-
\
1 944
-
-
----------- ------------ ---------1----------·~-------1-------------·
2
~-----------
11
Racia1
Investigation
.Age~,
I"
WRITnTG
!Vb
l-Iensured
9
5 '
~:
35
- !i '
1 245
-
I
282
5
i
2 646
1 200
282
I
-
j
-
i I ~ ~i* i~i II -~
I
2
4 126
806
66
I
-
!
j
.1"
----------- ------------·---------~-------------------r-------------J
:
I
,
._~
1
_ ! -_______!
, 9
1
I•
II
I
930
930
_ _l
~ J. ~!~- ~~_~~~
-'
~
i
J
France
(G. Lefranc)
Travail en mer
En mai et juin 1972, le N.O. "Thalasso." a r6a1is~ une campagne de pro-'> '. "
spection et dtinventaire des ressources dES cBtes orienta1es du Groenland; _
de nombreuses donn6es biologiques et biom6triques concernant surtout la
oo~~e et 1e ,s6baste ont 6ta receuillies sur le Dohrn Bank"le Gauss Bank,
Angoassalik Bank, !'fösting Grund et Reimland Rücken.
La "Thalassa" a, dtautre part, prospecte deux secteurs de la Mer du lTord: ,
dans In partie est du Dogger Bank entre 54°30'N et 56°N pour 10. recherche dos
concontrations de merlan, entre 62°1r et 63°N et 3°30'E sur des fonds compris
entre 400 et 600 m pour apprecier la repartition et l'abondance des principa1es esp~ces d6mersa1es. Au cours de ces deux campagnes, la morue, 1e
merlan et le lieu noir ont fait llobjet d1etudes toutes particulieres sur 1a
repartition des tailles, la composition en ages des divers stocks et sur les
correlations taille/poids plein et poids vide. D'autre part, 1 562 momes
ont et6 marquees en Her du Nord septentrionale dans 1a,r~gion de"Forty MiIes".
En mars et novembre, deux autres campagnes de prospection et de chalutage
ont et6 faltes dans les secteurs VIa, VIIb, c et VIlg, h, i, k.
- 11 Travail au laboretoire
----
Norue - merlan. Les releves statistiques concernant les apports des bateaux .
travaillant dans le centre et le sud de la Her du Hord sont poursuivis;
ils permettent pour ces deux especes de connaitre la composition en tailles
et en ages des poissons peches dans les secteurs IV~ et IVc.
En 1972, nous avons'commence lletude'des recaptures de morues mnrquees
'en Mer du lrord septentrionale au cours des differentes campagnes de la
" "Thalassa" ...
La bioloffie du merlan du sud de la 11er du Nord, son abondance relative
par rapport atu: autres especes demersales pechees dans les secteuxo
IVb et surtout !VC ainsi que llinfluence du maillage sur 10. qualit6
commerciale'dc ce poisson ont fait Itobjet dtune recherche qui sera
continuee'cn ,1973.
.
_
Lieu noir -_~~lefin - sole et plie. Les tonnages debarqu6s mcnsuellement
'pour chacune do ces quatre especes sont releves en fonction dos ffroupes
detailles definis par'la C.E.E •
.....
Echantillonnage
l-1ORUE
Region
...
'
I
-Saison
1972
IVC
IVb
IVa
Ouest ~
Irlande
•
Nb. echantillons
Bateau de
recherche 11arche
2
8
27
mare
mars
oct.
avril
,nov.
-
-
-
250
2 451
"2 579
98
64
_.
------------~---------._----------~------~-------...
..
I1ERLAN ..
,
IVc
IVb
!Va
,Ouest ~.
Irlande
VIIa
,
"
mars'
mars· '
oct.
avril
oct-dec.
"
3
22
18
-
-
-
---- -----------------------
-
-
,110
395
1 759
-
133
-
-
-
240
350
591
4 788
3 132
116
-
Hb.de poios~
'clasoes
s1.l.ivan"c race
Nb. de
Nb.
poissons otolithes
mesures preleves
-
-
-
-
---------------------_._---------~----------------~--- -----------------------
EGLEFIl
mars
!Vb
bct.
IVa
avri1 "1.'
Ouest )
nov.
Irlande)
~--------------------!
b..IEU NOIn
oct.
IVa
avril
Ouest )
nov.
Irlande)
101
2 992
1 129
1 500
1
18
----------~----------------~----------~---------------
8
-
-.
432
321
226
-
I
-
-----------------~------------------------------------
- 12 -
M' RL11.TJ . BLEU
.;...;;;;.~..;.,._.~-_.-
,..----...' -
~
...__-<-'-.""'"-:--~-::-::,~'--~
.:----::--,---:-=:-~-"T~:_:__::_Lch:::ntillons ! 1:0 de
. Hb.
Hb. de poissons
Bä-teau' CL", Marche '! poj.s,so.ns oto1i thes c1asses
rf' ,he:rche
I mcsnres
preleves' suivalrG r~ce
~---r;Tb~
R~2'iO_
Saisop-.
1972
-o-u-,-s-t'
) ·a.7rj.l .
__ ~~~~~~~~
~~::
0
~-I--= '1' '1'7'51
~-
-','
-----:--l---~~~---.--:--~-~-
=
----------- _
LII/[l\.J!TD]TI
IVb
IVe
maTS
rrars
CARRLET
---_.
-
IVb
.
- I
________ L
623
215
_
i
I
oet.
_________L
·1
":~,' _.~ . 'f'
l_-:'_":"_":' __ .L
'·90'
.;.
.
-
' ...
. __ ... ~=
•
Ieeland
.(.1. n _~.~?s.s~?) ...
.
j '..
.!" J
".
ThevlOrk at sea lTaS earried ou·t·by·Hie~R··IIB'järni Sremundsson" and.
"Hafthor tl • Both ships were in
all the year and ma(le regular
surveysof the hydr-ographieal c·ond-i tions in I<3eland and East··Greenland \'1aters. Besides this, RV t1Bjarni Sc:mundsson lf did a survey of the area
behTeen Jan Hayen and Spi tzbergen.:~n eooreration \vi th the Universi ty' of
Seattle to study thc hydrography of that ~rea with a special regard to the
iee eonditions, currents and the formation of arctic bottom water.
use
: "
These whips were also engaged in sUTveys of the most important stocks
cf demers-al' fish 'arofu1:d'Iceland"arid"ät East. ·'Greenland. . A'list"of the'
sampling data on tbe most important commcrcial species are shown on
the .follm'ling page. Besides this, ichth;yological data' ",ere' collected
on 40 other species of demersal fish in Icelandic waters.
~
An extensive tagGing programme of cod, haddock, plaice, Greenland halibut,
lumpsueker and catfish was continüed.
Three trips. l'Tere made lvi th ·.RV "Bjarni Soomundsson"· ·to study the pelagic
distribution of redfish 81'1 OI Ieeland and in the Irminger Sea.
A joint O-groupsurvey'in Faroese-, Icelandie- and East Greenlandic
Haters "ms made 'in July':':August 1972. The ships 'vhieh toole part VTere
R.V. "Cirolanait·(ü.IC,), "Fritjof Nanscn ll (USSR), "Bjarni Scemundsson"
(Icelanel) anel 1\.rni Frid.J::iksson" (Ice~and) _
Icelandic sampling' data on demersa·l fish ln 1972 (all year)
.-
!i
;
•
.
r
Area
,
Va ._
XIV
, Va
I
I
-
-
I-
Spee-ies
Cod
-
Ii
....
2476.3
I
Haddock
Whiting
3768
I
6305.
I
)
I
I!
,,
I
-2006
I
i
I
Coalfish
Norway pout
.
I
rneasured
I
I
Cod
ReseaY'C'h vpsspl s.=lmnlinD"
Market sarnnlinll
rneasured
aged
-
iI
I!
I
Blue whiting
Ling
I
Plaice
Va.
Halibut
Va
XIV
Va
eVa
1204
I
I
Lernon sole
Dab
,
1219
328
!
348
102
I
558
iI
I
I
I
I
Long rough dab
Lumpsucker
II
I·i
I
I'
I
Ve~
Grenad i er "
I
I
-
:~~;:~ ;~~t~~~t_
__J
429
1754
I
I
,
I
317
!
I
I
581
7593
1117
7260
710
2797
1706
621
1170
30
42
3696
1933
564
36
I
I
3829
5053
II
I
!
I
470
II
2461
I
1383
1
i
I
97
1199
3294
4
3
1801
2173
257
84
45
892
.236
42
_
.
3378
I
Catfish
L-_
2986
368
Ii
Va
XIV
I:
15992
I
Greenl. halibut
I
I-
983
I
I
I
.
740
840
I
1
XIV
I
J
3245·
I
I
XIV·
tagged
9120· .
1609
I
I
I
I
XIV
Va
I
I
\
Blue ling
Torsk
Sebastes Sp.
\
aged
I
I
- 14 Ireland
(A.E.J. Hent)
Durinß' "l;lle ycar Hork in Ireland uas restrictcd to eJ~2J1lination of 13
snnp1cs of uhitinr; comprising 2 950 specimells in 2.11.
3::.ll1ÜinC Data for JHITIlTG
~
.-
Ho. of Samp1es
Area Season Research He,rket
Vesse1s SampIes
-
VII C'.
Ir~ sh
iJeß
-
(~,!.
.-
1972
I
10
Heasurccl
~I--
700
3
-
-
U'L1Llbc:2 of rish
.
2 258
-
-
J.getl
Uacüü
1--
._-
Illves-;;iß'a-~ion
.
-
368
)10
I
.-
-
f
Hethcrlands
(J. I'. de Veen)
':lIlc )~V IITridens"made 16 crlüses in tl1e Cor.lIllit-~ce I s ['.rea oi' "Lich 10
ue:..'c LlC'.inl~l or partly devoted to uorle uithin thc scope of -(;110 Demersal
_
ri:::;ll (Uorthern) COIDmi ttee. The corresponc1.inc l1t1Dbcrs of c:i."Uises by
nv t1\!illem Detllcelsz" uere 15 and 10. Thc nv IiFac:.üen'-ce 9 \;U-ce:i.'n 1• an<l
"S clloJ.levae,r"made together 19 cruises devoted to demersal topics in the
lletherlands estuaries. The RV "Tridens", "Hillem Beukelsz","Sternll and
"Schollevaar" made hTO joint cruises (in April and October) to e.na1yse the
stocks of juvenile sole, plaice, dab, flounder, gadoids, shrimps and other
organisIDs in the nurseries of Be1gium, Holland, GerQany and part of Denmark
in cooperation with the Belgian research cutter "llinders" anel the German
nv "Ueptun".
Hork on Fish
Plaice. The stock analysis by means of market sampling was continued.
Analysis of the catches of the young fish crtlises in the Southern and
Central North Sea continental coast areas revealed that tho 1971 year
class is good and the 1972 year class average to poor.
Sole. The stock analysis by means of market samp1ing of sole from different
10ca1ities in the North Sea, the Irish Sea and the Bristol Chalmel "Tas
continued. Two c~"Uises (in March and August) were made to the Irish Sea ~
and the Bristo1 Channel for census and tagging purposes. An analysis of t~
catches of undersized sole in the Dutch, German and Bclgian coastal
area on a standard network of stations was made twicc in order to be
able to predict commercial catches. The year class 1971 appeared to be
average to poor and the 1972 year class was poor.
The f0110wing numbers of fish per species were taeged :
Solc : Irish Sea 3 150 (adults); Dutch nurseries 1 900 (juveniles)
pläice: North Sea 6 900 (adults); Dutch nurseries 7 500 (juveniles)
F10under:
Dutch nurseries 1 500 (adults & Juveniles)
~Cöd:-North Sea 2 300 (adults)
lllii~~: North Sea 800 (adults)
and whiting. The stock analysis by means of market sampling
continued.
C9~, ~addock
1-TaS
Cod. In the Southern and Central North Sea the year c1ass 1971 is poor
·and---the year c1ass 1972 average. Three egg and larvae surveys uere made
in the Central and Southern North Sea.
1'n~~~in~. The ycar c1ass 1971 was poor and thc 1972 ycar c1ass rich in
the Southern and Central North Sea.
•
The Netherlands 1972.
Sampling data for Sole
Area
.:leason
No of samnIes
Number of F1sh
only for agedetermination
Research
ship
Market
measufed
aged
racial
invest.
1st
2nd
3rd
4th
qllarter
quarter
quarter
quarter
5
-6
2
20
11
4
2125
3385
2375
2658
100
1081
549
365
100
1081
549
365
IV c
1st
2nd
3rd
4th
quarter
quarter
quarter
quarter
3
3
4
20
12
4
3875
6385
2500
2033
196
1075
632
259
196
1075
632
259
VII a
1s.t quarter·
2nd quarter
3rd quarter
6
,.
2
4
11
250
625
613
408
127
613
408
127
Dutch
Iiaddensea
2nd quarter
4th quarter
3
6
-
403
755
32
79
32
79
Zeeland
estuary
2nd quarter
4th quarter
4
-
-
946
95
88
88
38
92
28410
5604
5604
IV b
Total annually
-
.....
\J1
The Netherlands 1972.
Sampling data for Plaice
Area
Season
No of samples
Number of Fish
only for agedetermination
Research
shin
-6
1st
2nd
3rd
4th
quarter
quarter
quarter
quarter
1st
2nd
3rd
4th
quarter
quarter
quarter
quarter
3
Dutch
,'/addensea
2nd quarter
4th quarter
5
9
Zeeland
estuary
2nd quarter
4th qua ter
IV b
I
I
IV c
Total annually
Market
measured
aged
I
racial
invest.
48
3
5
1
4050
3180
1880
3600
3609
572
354
610
3609
572
354
610
35
3
2
6
5550
3530
1280
3900
2521
434
121
792
2521
434
121
792
-
-
3000
3390
170
237
170
237
3
-
-
2460
740
99
99
39
103
36560
9519
9519
-
8
5
'~'he
•
Netherlands 1972
sampling da.ta fer
ares
~
::;elJson
No. of sampIes
Nwnber of Fieh
--
for age-determination
only
IV a
IV b
.t---~--.
IV c
-
research
ship
market
measured
aged
2
2
3
530
385
275
330
250
175
75
150
905
715
300
200
285
150
210
75
175
150
2195
1st
2nd
3rd
4th
qU8.rter
quarter
qua.rter
quarter
--
1st
2nd
3rd
4th
quarter
qua.rter
quarter
quarter
3
1st
2nd
3rd
4th
quarter
quarter
quarter
quarter
Total annua11y
._-
-
I
2
r--._~
2
3
4
2
660
1 /+85
.. -
1
,
-
I
2
1
1
3
2
1620
880
440
990
8
27
9215
-
racial
investigations
--
--
---
-
--
-----------------------------------
The Netherlands 1972
sampling data for Whiting
area
Season
No. of samp1ea,
I
Number of Fish
only for agedetermination
research
ship
IV a
1st
2nd
3rd
4th
quarter
quarter
quarter
quarter
2
--
j
.-
I
I
!
market
measured
aged
'.
3
3
1
2
i
594
714
210
294 '.
f
i
!
:
1
,~
250
150
50
100
racial
investigations
,I
!
--
I
--
,
I
IV b
IV c
I
1st
2nd
3rd
4th
quarter
quarter
quarter
quarter
1st quarter
2nd quarter
3rd
4th quarter
Total annually
3
2
-1
2
2
5
2
,
!
988
462
924
546
,
1
2
2
-2
1182
798
672
1092
10
25
8476
--
,
250 '.
200
250
100
100
100
I
-
200
1750
!
.
:.
,
.
-- -
---
I
.!
"'I
~l
]
:1
II
11
o!
'I
I
I,
j
I
.....
CD
The
•
1972
~etherlands
sampling da ta for Haddock
area
sea.son
no. of sa.mples
-
~
Number of Fish
only for agedetermination
resea.rch
ship
IV a
IV b
IV c
market
measured
aged
1000
1120
350
630
242
140
50
125
--
1
2
5
3
760
420
1260
420
150
100
274
146
-
1
3
100
350
100
50
62
1st
2nd
3rd
4th
quarter
qu.arter
quarter
quarter
--------- --_._-_._--_.
1st
2nd
3rd
4th
quarter
quarter
qu.arter
quarter
2
1st
2nd
3rd
4th
quarter
quarter
quarter
quarter
Tota.l annually
2
4
3
3
1
2
--
24
-
-
racia.1
investigations
--
---
-
-
-
-
-
6510
1339
-
_.....- ..;-_...
....
\.0
I
The Nether1aods 1972
Samp1ing data for Saithe
area
season
no. of sam;p1es
Number of Fieh
ooly for agedetermine,-i;i('r.
research
ship
IV. a·
IV b
1st
2nd
3rd
4th
quarter
quarter
quarter
quarter
1st
2nd
3rd
4th
quareer
quarter
quarter
quarter
--
----
Total annually
.-
_.~
market
measured
age<!
3
588
441
294
490
224
-1
--
-
-
-
50
-
4
1863
-
racial
iovestigations
---
-----
299
-
-
-
75
-
l\)
o
- 21
Norway
(A. nylen)
II and I Fisheries
The sampling activity continued at the same scale as in 1971.
Stock assessments were continued for the stocks of Arcto-rro~Tegian
cod and had~ock, saithe and Greenland halibut.
Sub~~a
In February the distribution and abundance of spauning Aretoeod ''Iere studied in Lofoten and in Harch mature cod
,rere tagged in the same area. In April 0. survey of eod egg
distribution was earried out in Lofoten.
lTo~Tegian
.
"
In April-llay the distribution and abundanee of young eod, haddock
"and redfüh '\'Iere studied in the :Barents Sea and the Dear Ioland/
'Test Spitzbergen area. In August- September a survey of the
distribution and abundance of O-group fish of eommercially important species were undertaken in the same areas as part of the
International O-Group Survey. At the same time immature cod and
haddoek uere tagged in Division IIa"and Subarea I.
In Iiarch 0. survey of spavming saithe ''las undertaken in tho southern
part of Division IIa. In September the distribution and abundanee
of O-group saithe were studied in DivisianIIa. Immature saithe
'\lere tagged in June and in the most southern part of Division IIa and
in August in the Northern part of this Division and in Subarea I.
Subarea IV
The sampling of industrial catehes of Recommendation 4 fisheries
in Subarea IV and the southern part of Division IIa 'TaS undertaken
through the l'lhole year. All together 163 landings from Subarca IV
and 115 from Subarea IIa were analysed. In February, June and SeptemberOctober surveys of the distribution and the abundanee of thc most
important species were undertaken in Subaroa IV.
- 22 -
SAMPlING DArA 197 ~
-,
SPEcrES
AREA
COD
I
4
' 1
2
--8
3
1
3
IIb
110
I
HADDOCK
IIb
110
'1,-
-
-
1
2
3
4
,18
-
1
-1
II
SAITHE
I
4
110
1
2
3-
.
,
-
'-5
-
' 16
604
229
146
,
-
-
-
",1
15
'l3
'17
14?
2
'3
I
-1
..
'
'
'
-
,
J
'-
'
--16' ,
,
'
-
63
229
146
-
020
179
170
121
991
1 082
931
1 158
1 003
2 050
298
275
937
89
-
-,
~
'
-
-
-2 588
-
491
-
-
1 93J
'854 ' :' 440
1 r03"
-
608
843
3
9
5
10
'
-
3 726
4 749
,-
-
1
--
,
1
1
4-
:0.
,
-
6 ß46
l '594
12 :509
-
-
3
-
-
;~1
4-
IVo
-
2
-
,
2
-
1
2
.'3 '
1
-
-
-
I,
-
523
100
-
-
-
'55 436 '4 687
3 217
, 386
-..
...
,
-688
-
~
-
307
2 523
' 766
-1 -189
-
,
-1
,
"5 446
-
1
16
17
~agged
523
100 '
,26.
- -"(
3
1
2
3
4
'.,
6
5 69t;·
1591
-
1
2
3
4
,
.. '
"
...
-
-
-
,
-
r-
4
2
3
4
I
8
7
20
~
33
Ä.ed
Meosured
-
-
1
2
-I
NO. OF FISH
NO. OF SAt'"I?L.:.S
Mo_-ket
R/V
SEASON
-
-
-
-
-
861
-
-800
I I 1 -100
700
-
2 397
-
I
- 23 NORWEGIAN SAMPLING DATA 1972
1
SPEeIES
AREA
1
I
COD
NO. OF SAMPLES
R/V
Morket
SEASON
33
2
3
4
1
2
3
IIb
8
37
20
35
NO.
Meosured
836
5 694 2
1 591
5 446 1
307
523
766
189
523
100
523
100
a.
1
688
4
1
2
3
110
1
3
269
17
55 436 4 687
3 217
386
2 588
491
4
l.---r-------t-----+-----+----+------+---+----+
I
1
- HADDOCK
I
2
18
14
6 846 ,1 931
I
I
440
1 594
854
16
3
i
12 509 :1 103
4
1
17
I
;
1
IIb
1
-16 Ii
:
:
2
16
1
1
I
II
i
3
- 1I
-
-
:
I
-
I
1,
I
I
I
,
I
110
i
;
,
I
,
,
,
I
i
1
,
i
i
i
t-"
I
I
I
I
SAITHE
.,
I
I
I
I
J
I
110
I
IVo
GREENLAND
I
HALIBUT
IIb
110
Va
XIV
.-
4
I
1
2
3
4
-
1
2
3
4
1
2
3
4
1
2
3
4
2
2
2
2
3
2
-
:
--
- I 1
1
3
-2
-5
-1
3
-
-
-
-
11
15
-
13
17
14
21
2
1
-1
10
13
45
24
14
63 i
229
146
146
-
3 726
4 749
-
3
9
5
10
- !
604 I
229
-
-
I
I
-
-
608
843
-
--861
-800
-
020
179
170
121
991
1 082
931
1 158
1 100
700·
1 003
2"050
298
275
2 397
937
89
-
1 566
564
1 330
2 903 .
1 362
-
-
197
237
398
50
-
-
-
246
752
1
i
- 24 Norwegian sampling in the area where industrial trawl fisheries take place
'\
SPECIES
Cod
Haddock
.
.
.
. '.
Norwoy pout
,.
NO. OF FISH
Measured Aaed TagQed
8
3
8
22
22
44'
49
44
4
23
233-:
233
IVb
1
3
12
2
80
160
80
160
110
2
3
IVo
1
2
3
4
·9
1
3
6
2
NO. OF SAMPLES
,··..·'R/v
Market
2
13
24
6
3
38
21
.156
1 719
338
1 528
2 290
8
'2
46
"
453
69
604
1 206
320
124
23
118
138
316
IIo
IVo
3
1
2
3
4
5
6
11
17
68
31
237
186
316
IVb
1
3
1
1
4
20
4
20
1
3
4
8
3
12
295
176
2 150
84
176
293
IVb
1
3
8
2
960
107
154
107
110
1
338
267
50
515
705
444
012
129
321
347
540
894
1
..
4'
2
.
.
1
2
3
,
,"
..
..
IVa
IVo
'
: .', .
SEASON
.'
Whiting
~',
AREA
IVb
Soithe
~.
1Vo
3
4
1
2
3
4
10
6
12
30
3
1
5
18
18
37
11
. _' .
.....
2
2
5
5
"
-
- 25 -
continue •••••
AREA
ISPEeIES
·SEASON
R/V
.
IVb
' NO.:···or
SAMPLES
Market
NO. OF
Measured
1
2
162
3
1
123
F1SH
AQed TaQQed
52
I
"
ISlue Whiting
110
1
I
5
16
1 111
3
23
893
4
I
I
I
IVo
II
1
I
I
I
!
3
ISilvery 'pout ' 110
.
. .
I
I
'
..
!
44
11
2 355
.2
. _.
... .
I
I·
...
I!
;
I
1
!
I
2
!
I
1
I
.1
I
3
I
1
-
I
- .
smelts 110
-
1
.
2
I
I
.
-- - .
,.,..
..'.
I
3
I
i - ..
4
.I
....
IVo
.
'.
1
.,
.
. .-
2
3
8
4
"5
I
I
I
I
I
I
I
iI
I,
1
I
I,
I
I
i
I,
I
i
I
I
j ..
..
:
i
,
20
I
50
I
., . :,
I
-- --
!
_. -.
4
I
..... . .
.. -.--
...
·120.· i
65
65
.
..
902
12
923
~
.'
. .
. .
.
767
f
l:
..
I
,;
8
14-
1 440
200
16
2 003
399
6
830
218
iI
I
,
34 ,!
I
I
i
!
170
II
1
!
I
\
II
I
t,
j
4_33
14
2'
I
.
~
.-
346
I
I
,
1
I
I
6
1
I
120
t
-
!
50
-
2
..
121
j
I
!
i
3
I
I
I
!
II Silver
409
I
2
4
4
I
I
I
185
2
I
i
893
·1I
3
....
I
... -.,
. I
I
IVo
946
3
3
)
12
1 787
. ~J'"
..
.
90
16
I
..
1
2
4
i
168
2
I
I
I
...
I
I
.
.I
I
- 26 Poland
(w.
Ci~glewicz)
lnvestigations on more impo;tant demersal species were carried" out
4uring 197~ in the Baltic, North Sea, South of Ireland, near the
Hebrides, in the Uorwegian Sea"7 Barents Sea, off Spi tzberg'en and
Bear lsland.
SampIes were collected mainly from the commercial catches for determination of length, weight, age, sex and maturity.
1. BaItic
".
Cod- From
141 experimental hauls made in January-March 1972
~the Southern Baltic by lCES standard trawl 7 388 young cod were
measured and the age of 1 445 cod determined.
From commercial catches made by cod trawl in the Southern Baltic 31 856
cod "Tere measured and the deta.i1ed analysis was carried out on
4 965 cod.
Flatfish - In 46 sampIes of f1atfish taken from commercial catches
~
made in the Bay of Gdansk and in the Bornholm region 4 813 flounder~
and 760 plaice were analysed on length, weight, age and sexual
maturity
2. North Sea, Hebrides, South of Ireland
Species
Haddock
Saithe
Cod
Hhiting
Nortll Sea
leng-th
ar;e
Hebrides
length
age
4 697
2 210
1 001
2 981
601
701
201
300
601
300
-
-
1 456
1 518
300
-
-
-
!I
300
I
I
3. Barents Sea,
No~vegian
-
South of Ireland
ag-e
leng-th
I
-
,
-
Seat Bear lsland and Spitzbergen
Barents Sea
I
age
length
length
age
Cod
3 898
480
1 305
483
417
Haddock
3 599
-
-
-
-
Species
,
~---
--
-
NorvTegian Sea
Bear lsland and
Snitzber,g-en
length
age
--"180
Portugal
(J. de Ataide)
Studies related to this Committee were only concerned with sampIes
of cod t~{en by the commercial fishing boats in the lCNAF area
(Subareas 1 and 3). Information has been obtained on length, stage
of maturity, age and first age of maturity (see fo11owing table).
These are being processed for later analysis.
--
- 27 Sampii.ngDa1;a far Gadus morhua
Area
Season
lCNg IX)
ICNAF 3XX )
_
2nd
3rd
2nd
·3rd
4th
No.·of Sampleo
..
Research
11arket
SampIes .
Vessels
Quarter
Qu~ter
Quarter
Quarter
Quarter
No. of Fish
Measured Aged
-
5
28
2 314
13 250
-
7
20
1
2 485
6 666
665
,
.
Racia.l
lnvestigation
--
150
575
125
500
-
-
-
. x)EQUivalEmt to· statistica1 area IV of the North ·American Counci1 on Fishery
: Investigations.
XX)EQuiva1ent to statistical ~rea XVIII and XX of
on Fishery lnvestigations.·
t~e
North American Counei1
.<
,.
,
'.1
Spain
(0. Cendrero)
AueUi', +.:avail nta ete fait durant 1972 •.
Sweden
(G. Otter1ind).
In the Ba1tie,investigations have been made on cod along the same lines
as in previous years. Oto1iths were.co11ected from about. 3 000 cod. The
age determination of young cod from different.areas and seasons oceupied
the main interest. Samples of cod eggs ...and 1arvae ha.v:ebeen collected
and the abundance of young codstudied by using the Baltic standard trawl.
Aecording to the abundance of eggs and larv~e in the ·ma~n spaiY.ning period
a better reeruitment to the stock was p~obab1e .for 1972 (in 1971 low
~xr~:nr~~~~:e~~):he bottom water of the Ea1tie .~~?~~: was fol1.?wed b1.
Uni ted Kingdom·
1. England and Wales
(D.J. Garrod)
1. Region I Fisheries
Stock assessment programmes have eontinued. RV "Cirolana" carried
out three eruises in the area during the year. During March a cod
blood serum survey was eompleted extending from Greenland to Iee1and and
aeroBS to Faroe, Seot1and and Norway.
- 28 In May and June a study of the vextical distribution of gadoids in
the Barents Sea was initiated and in July a survey of the distribution
and abundance of O-group fish at Faxoe and eastern Iceland was undertaken as part of an international survey~'
2. Region II Fisheries
The programme of sam~ling commercial landings at all the major
fishing ports was maintained.
The adult plaice biological programme in the North Sea was continued
but at a lower level than in the previous three yeaxs. Plaice eggs and
larval survey were carried out in the English Channel, together with
release of tagged fish on each of the main sp~vning grounds in the east
artd west of the area.
The juvenileplaice studies off the Yorkshire coast, whcih included
the tagging of l-group fish, was extended to include an egg and
larval survey in the immediate vicinity of the nursery ground. A
comprehensive- survey of the inshore and estuerine distribution of- fish
eggs and larvae was carried out around the ,jest coast of England and
Hales.
Cod investigations in the Irish Sea continued with a research cruise
in March; adult cod were tagged, an egg and larval survey completed, and
blood samples for immunogenetic studies collected. In the North Sea an
extensive O-group cod survey from latitude 57°N to 52°N was carried
out in June.
In July-August a groundfish survey was undertaken in Region VIA to
the west of Scotland.
~ease
Region
IVA
!VB
IVC
VIA
VIIA
VIID
VIIIl:.
YIIF
of tagged fish 1972 - ICES REGIONS
Plaice
Cod
-
-
712
644
136
-
1
378
330
-
Species
Ray
Lemon Sole
-
-
-
55
60
-
428
-
10
-
36
4
222
-
-
by
1 492
1 930
Species
_____________J_______
115
40
- Total
Spurdog
--
Total by Region
-
428
712
378
10
1 330
735
200
222
438
4 015
-
-
-
-
--
,
------~----_._-------~-~~-----~-_ .. _-~---------------- --
- 29 Sampling Data for COD
-Seaeon
Area
No.'of Sampleo
cn ilJla.rlt e 1;
VesE?ele
Samples
Spread
I-IIA-IIB
-
througho~t
the yea.r
VA
"
"
"
"
"
"
"
"
"
VB
VIA
IV
VIIA
VIIF
VIIG
VIIE
VI:B
-
No. of Fleh
Measured Aged
41 631
235
108
14
6
82
18
1
547
93
40
446
115
9
1'3
2
1
638
683
866
321
960
284
511
315
97
Raclal'
Investigation
1 971
'
'
2 211
829
514
2 337
1 875
197
-
-
-
"
---
-
-.;
-
'p"
,
-
~
...
Sampling Date. for HADDOCK
-Area
I
I-IIA
VA
I VB
Season
I
Spread
throughout
the year
"
"
"
VIA
VI:B
IV
VIIA
VIIF
VIIG
-
186
-
284
54
24
2
193
33
4
3
-
-
"
"
"
"
-
"
No. of Flah
fileasured Aged
No. of Sampleo
Harket
Research
Samples
VesE?els
Racia1
Investigation
1 169
-
43 264- 1 200
10 311
17
4 791
488
31 045
5 734
692
487
-
- 28 462
-
-
-
-
-
Sampling Data ror WHITING
,-hea
IV
VIA
VIIA
VIIF
VIIG
VIIE
--
Season
Spread
throughout
the year
"
"
"
"
"
No.'of Saml)leo
Research I'iarket
Samplea
Vessela
-
No. of Fiah
Measured Aged
Racial
Investigation
-
229
20 803
650
-
-
1
95
8
1
62
85
10 655
974
109
9 284
968
193
39
427
-
...
-
-
-
- 30 SampliM Data. tor PLAICE
-Season
Area.
Spread
throughout
the year
I
VA
It
IV
It
VIIA
"
"n
VIIF
VIIG
VIIE
n
No.'ot Snmpleo
ResearCh i'1arlCe"t
Samp10D
Vesse1s
-
6
---
99
442
107'
21
3
56
Uo. of Piah
HenDured !l.B'sd
Racial .
Invccticaticn
"
-
-
1 420
,
'.
---
16
90
20
5
589 958
577 3 860
733 2 001
405
344
26
141
9 278 1 010
--
Sampl1ng Data. ror COALFISH
-Season
Area.
Spread
throughout
thc year
I-IIA-IIB
VA
"
"
n
VB
IV
n
VIA
No.'ot Bom'Pleo
Research l'tarkot
SampIes
Vessels
No. of Fish
l'Ioasured Aßed
" IDicia1
Investigation
-
59
5 924
614
---
-
96
37
51
70
5 937
:5 726
5569
6 607
1 028
317
319
549
-
--
-
Sampling Data ror RAKE
'"
Area.
"
.'
--
'"
Season
No.'ot Bampleo
ResearCh J:1arlCO"t
Vessels
Samp1es
..
.
VIA
VIIA
VIIF-G
Spread
throughout
the year
"
"
"
-
--
.'
28
5 282
56
47
10 542
9 692
3 020
10
.. ,
.
"
.....
No. of Fiab '
Ueaaured Aged
'"
IVA
",",
Racia1
Investiga.tion
''''.
'"''
---
'
-
--
.'
Samp1ing Data for MYS
-.!:rea
Uo•. of Somp1oo
Beasen
Ue~oa.rch
H&A01i
He. of Fioh
Hco.suxed Acod'
n:l.cia.1
Invcstigation
Vesselo
Sco!>los
--
21
2 245
-
-
69
23
11 409
3 954
1 078
175
-
~
Spread
.throughout
.tbe year
VIA
"
....
VIIA
·n
.VIIF-G
..
Sgmp1!ri5 Data for
SOLE
.
.-....-,
No.'of Snmpleo
i{eSCarCn l'.LarJ.>:o"t
Vesse1s
Sa.mples
~
. Area
Season
.'
Spread
threUghout
thc year
IV
VIIA: .
VIIF-G
-
--
"n
....
-
tt
VIIE
Uo. of Fioh
Heaoured .tv.red
185
20 958
1 223
45
14
72
9 665
3 983
14 015
352
244
266
Racial
Investigatien
-
--
Samp1ing Date. tor LEt·ION SOLE
--
..
Area.
..
,.
No.' of Snnpleo
uesearch Harket
Vesse1s'
So.mplcs
Seasen
,
.
Iio. of Fiah
Ire n sured Agcd
"
,':
·,·!Ra.cial
," Inv~stiga.tion
'.
VIIE
·e
Spread
throughout
thc yea.r
-
60
8 354
187.
:.:.;J";:.-,
-
. ., ......... ,.,., .
.
.~ •• ~.
. ' V'
'
..
"
< ..
"
Sampling Data. for TURBOT
..
._-
.
'."
•• .L'
Area
Seasen
IV
Spread
throughout
the year .',
No.'of Somploo
UesearC!l i'1OXll:C't
Scopleo
Vesscls
-
110
Iro. of Pioh
NClJ.oured Agcd
5 957
-
•
. Ro.cial
Investigatien
-
.'
Sampling Do.ta for SPURDOGS
-Area.
IV
Season
Sprcad
throughout
thc ycar
Uo •. of Sm:l.'Ploo
Rcoco.=ch Uarket
Sl'..t1J.)lOD
Vcoaclo
-
107
No. or Fioh
Necm,u:ed. ÄS'od
9 038
1 529
Rc.ci 0.1
Invootigatien
-
- 32 2. Scotlan9:
(R.
Jones)
Routine trawling surveys were carried out in the North Sea.in April ..
and October/November and on the west coast in December 1972. These
were used to determine the lengths and age compositions of the major
demersal stocks and to obtain pre-recruit estimates of the year class
strengths of haddook, whiting and No~~ay pout. Further estimates o~ the
relative strengths of gadoid year class strengths were obtained by sampling
O-group gadoids pelagically in the North Sea in July/August 1972.'
Cod, haddock, whiting, hake, saithe, plaice, lemon sole~ and megrims
were sampled at the principal Scottish tra\v1 and seine port's as in
previous years. SampIes were measured and otolith sampIes were taken
for age determination. These data formed the basis of material supplied
to Annales Biologiques and to ICES Statistical NelfS Letters and were
also used to provide forecasts for the major Scottish fisheries.
Landings of HO~'TaY pout at Scottish ports "Tere moni"tored; sample's'"
being taken from both foreign landings from the North Sea, and from
,Scottish landings from the Minch and Shetland waters. Variations in
the fecundity of this species were investigated from research vessel
sampIes.
..
An exploratory fishing survey was carried out for sandeeIs off the'
Scottish north and west coasts in June.
Haddock, whiting, plaice and lemon sole were tagged in Scottish uaters,
and further attempts were made to improve fish condition, by using a
modified canvas codend instead of anormal netting codend.
"
".
Furtherfield and laboratory work was carried out on the hearing
abilities of demersal species, inclding cod~ haddock~ plaice and dab.
In addition, tracking experiments were performed using ultrasonic
transmitters inserted in cod and skate at several Scottish aea lochs.
The acoustic properties of cod swimbladders were investigated by means
of a low frequency spectral response technique.
Aquarium studies have been continued on the efficiency of food·
conversion in gadoids and studies have been continued on the feeding _..-..
behaviour of gadoids.
Analysis of demersal fish stomach contents has been continued with
particular reference to differences in stomach contents be twen species
and between different sized indivi~uals of the same species.
The extensive survey of the occurrence of' a tapeworm larvae in the
1967 year class of North Sea whiting was completed; rotd investigations
were continued on the occurrence of nematode larvae in tne musculature
of cod, whiting and small gadoids in Scottish waters.
The numbers of demersal fish measured and aged in 1972 are ShOl·r.n
in the following table.
e
- 33 -
SAMPLING
DATA· FOR· DD4ERSAL
FISH
A. _ Gadoid rieb
(All figuree in hundreds except for cod andhaddock which are , in thousands)
I
. Area
HADDOCK
COD
WHITING
! Mea!A edi Mea- ! A edl
wred) g ; eured , g i
.SAITBE
A ed IMea-.
,g
sured
Measured
A
g
!
HAKE.! T. ESMARKI I
- I A edi'Mea- I A ed
ed,\I Mea
eured l g . sured . g
,
! 1)
N. Sea
j
I
-12)
.. W•. 'Coa8t,~ 1)
:
I
_.
i
4~ -
1
i
White
Sea
I
I
1i
-
-
26 13
1) 34
- _' -2):.. +
11)
-
-
-
12 )
-
-
+
...
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I
i-
1
- I-
)
1·
I -
1)
.-.
I
B.
!
..
·':'PLAICE
!
~ MeasÜred
Area
_.-
~
N. Sea
..
i,
,
1)
i
Aged
!
533.
2) -+
I
I
-
1) ."
'2)
-
-
-1--
2)
-
-
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i 1)
j 2)
12
+
."
i
Measured
..
121
..
'. I.1) ;"4jq
+
i
i
17
I
+
I
2)
+
1)
2)
13
Aged
MmRIM
MeE18ured
!
.i.
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,
75
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9
+
+
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I
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, 2)
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.,
1)
2)
White.Sea
1)
2)
24
+
19
+
--
--
-
-
-
-
1)
Market sampling (1ata
2)
Research vessel data
Lese than 100
+
1) 152
2)
1)
2)
1)
2)
25
+
+
1
1
1)
2)
1)
2)
1)
2)
1)
-
-
2)
-
-
1)
2)
-
I
!
1
..
Aged
93
+
19
+
-
1
+
i
iI
I
.,
-
i
,
..
-
',:
,
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~
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.! ..
. I'
Faroe
-
I
Flatfish
I
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Coaet
2)
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I.
,
+
1)
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i
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9
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2
25
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1 2)
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5
1) 194,
2)
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---
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- 34 U.S.S.R.
(G. V. Nikolsky)·
In 1972, as weIl as in previous years, the Polar Research Institute of
Fisheries and Oceanogrphy collected materi~ls for.determination
. of abundance, size-age compoaition and distribution of cöd, haddock, redfiah, Greenland halibut and other bottom fish in all main fishing ~eas
of the North Atlantic. The volume of material by areas is given in
the following tables. The materials were collected on board research
an scouting vessels.
~mrine
In 1972 we worked at obtaining more precise evaludtion of the state of
stocks of the main commercial species; conditions of survival of the
young at diffferent stages of development were studied; ichthyoplaru{ton
was collected and analysed; fisheries forecasts were made; l'1Ork:·st
development of methods of fore casting was continued.
The laboratory of the northeast ~tlantic of the Atlantic Research
Institute of Fisheries and Oceanography carried out investigations
in the North Sea and to the west of the British Isles.
~
In the North Se~ Soviet scientists paid much attention to investigations
of stock state of haddock., coalfish, whiting snd Norway pout. Fox this
purpose, we studied problems connected with the abundance of haddock
year classes in their earlier stages of development and with the effect
of changes of hydrographical conditions and zooplankton development on
the survival of Spffinl and larvae. This work was carried-out during
expeditions from February to April.
Counting trffiil survey was conducted from January to April and from
September to December to wtermine abundance dynamics of adult and
immature year classes.
The analysis of these data assisted the use of calculating methods for
stock determina"tion. Biological information on gadoid fish and J:Torway
pout was collected west of Great Britain. Fishery statistics w&re
analysed for preparing the recommendations for the industry.
Tbe Baltic Institute of Fisheries studied conditions and efficiency of
reproduction, stock state and composition, peculiaritiesof distribution of cod and plaice, effect of feeding habits on some physiological features of cod (content of proteins and lipo~roteids in blood
serum, liver weight, stages of gonad maturation), dates of different
periods of the ycar cycle, effect of herring and sprat distribution
peculiarities on their role as food for cod.
The chair of fish biology of the Moscow State University continueu
studying the peculiarities of reproduction and maturation of some
fish species in the Ul'li te Sea - Liopsetta ~laCialis (PalI.) ,Ele.ej.!lus
navaga (PalI.), ~oreogadus saida (Lepechin , Cyclopterus lumpus L.
and also elucidating the specificity of physiological-biochemicaJ.
indices of flounder Platichtys flesus (L) in different latitudes
(the White,the Black and the Baltic Seas).
•
S:able 1.
_.
__
Eiological material collected and processed in the
]ear Island-Spitsbergen area in 1972
.
Hass
measu:ce
ment
Species. .
Age
No. of
specimcns
collected
adult young
-'--,.
eod
29 53·8
Haclclock 7 415
Redfisb 78 106
Ealibut 17 636
Siüthe
532
2 677
1 292
4 880
1 983
10
Other
species 41 912
1 269 .
.
Total
~
l75 199
I
~_b_~~
•
t
I
.
. .
2 111
3 171
706
1!'ield
Fat- . Analysis Tagging
ness of Feed
1 979
3 749 -
-
1
428
-
256
1
11 422
242
-
-
60
-
3 023
T:;:-ai'll sampIes
of plankton
col1. proc •
-
8 479
2 202
4 796
IchthyoRing trawl
plankton
coll ~ .. proc. - . colL' " proc.
1
:t
7 626 2 407 29
499
. . . . ._ ________ L
.
,
-
. .
Vl
\Jl
42
---~---
42
~
_
42
42
84
84
------- ----_._--
Tab1e 2.
~Cies
I
.Aue
i'lass measurement
·No. of· spec.
co11ected
adult
adult young
71 308
Haddock
Redfish
Ha1ibut
98 334
15 793
4 022
Sai'~he
Total
Field
"Analysis
Fatness of
1 571
47 079
7 222 4 172
5 549 3 434
697 2 370
793
74
3 626
-
-
-
Tagging
Plankton
trawl samo1es
'Riru; travrl
co11ected pro'cessed co11ected processed
f~eding
"
-
eod
Other
species
Biological material col1ected and sprocessed in the
Southern Baren'~s Sea in 1972
2 911:
3 200
-
14 030
I
11 545
3 472
1 8?5
378
358
1 560
5 391
393
902
,
..
-238 107
--..,.--~-----_.-
17 961 9 976
6 111
36 641
3 213
------ ----------------~~---------------~--~
40
40
-
,
.. --~------
..
L
51
51
.
.
--------------------------:
.
•
Table 3.
•
A
Species
Biological material collected and processed off
the northl'Testern l\Torwegian Coast in 1972
Nass
measurement
adult
:
,
Age
collected
adult young
:
2edfisü
Ha1ibut
Saithe
Other
specics
_.
Tot8..1
2 351
;
3 009
10 438
1
12 211
,
~ 104
1 ~10
-
111
:
-
-
1 61-0
!
2 041
-.
I
Tagging RinJ'l: tr8,vTl
co11ected
-
1 134
1 447
1 653
-
2 294
89:6
Ichth;ron1ankton
collectöd processed
;
i
!
;
-
-
-
,
I
Haddock
Fatness
I
---_.. Cod
Field
Analysis
of
fee:iing
,,
,
";
1
1
2 906
~
:
,
'-t-
;
201
;
10.6
,
-
.-
!
30 123
4 921
__
207
__=________~~:~J_~_ ~~~ ---------
~-------------------------------
514
-----------
1 508
139·
---------~~~--------.
- 38.
Tab1 e..A.
Species
..
Material collected and treated in the areas of Iceland,
East Greenland and North Sea
I
i
llfass
A~e
measure- No. of specime.ns Fatness
men~s
coilected
---
Total
Field
analysis
of fee.ding
Tagging
Area of Iceland
1 281
132
56 715
14 504
1 025
34- Oll
Cod
Haddock
Halibut
Redfish
Saithe
Other
species
.
I
-.
-
-
1 807
1 009
413
1 615
107 668
..
406
150
1 035
556
5 879
-------- 1----------- ---------------------------
706
68
4 434
2 414
560
5 34·5
-
2 054
-
1
2 056
J.) 527
\
I---~--~.,.----
1
------~-------
Greenland area
Cod
Haddock
Halibut
Redfish
Saithe
Other
species
Total
486
100
13 964
4 581
310
-600
-
..
,
990 .
20 021
. -
-
1 010
i
100
-
... -------- -----------1------------------
100
--_._----
-
883
--
..
101
23!?
2 052
-
I
122
-
.
101
3 289
----------- 1- ... _ - - - - - - - - - - - -
North Sea
-
Cod
Haddock
Halibut
Redfish
Saithe
Other
species
2 049
406
1 632
113·
Total
7 766
90
3 995
412
-
1--------------
I
931
-
- .-
----~---------------------------
-
80
438
I
-
-
366
310.
1 194
-
-
; .
--------------------
-----.
•
- 3-9 -
•
Table 5•
Species
Material collected and processed in the areas of the
Hebrides and Faroes
I Nass measurements
I
-
..
t
At!e
No. of speoimens
collectcd
F ield analysis cf
f eeding
-------_.~-+
Ares of thc Hebride s
-
-
00<.1
Haddock
Halibut
Redfish
Saithe
Other
species
300
300
231
-
30
1 185
-
5 372
-
-
-Total
6 788
300
30
-
1--
--------- -------------------- -----------------Arca cf thc
Ocd
Haddock
Halibut
nedfish
Saithe
Other
spccies
---Total
-
50
30
977
185
297
296
-
89
1 512
200
400
515
865
-
2 975
-
----------------------------------------------------i
360
Fa~
18
76
225
,
----
I