--------
------
International Council for the
Exploration of the Sea
C.M. 1985/G: 1
Report of Activities
DEHERSAL FISH CDHHITTEE
by
B. Vaske
1984
BELGIUM
(R. Oe Clerck)
Recording of densities and growth rates of the 1983 and 1984 year
classes of sole. plaice, dab. flounder.
cod and whiting was
carried out.
Two cruises were
young fish survey.
also underaken for the international demersal
The market sampling was continued covering cod - North Sea,
whiting - North Sea, haddock - North Sea, plaice and sole - North
Sea, English Channel. Celtic Sea and Irish Sea.
- 1 -
,:;pecics
Area
~o
SeasOn
oe
sam})les
He~enrch
Cod
IV
.,
J
4
Harket
~o
oe
l:iamples
leasurt=d
A(;e<.l
4
J~U
6
4
478
85
175
)00
170
ci
J'.9
15U
"hiting
1
Ö
öu6
105
IV
2
7
S;\ö
J
')
,,44
95
110
4
(,
:JJö
115
1-4
7
'171
lilO
Iladdock
IV
(R. Wells)
Canada had na fisheries and na research activity in the lCES
area in 1984. Activities in the Northwest Atlantic in 1984
have been reported to NAFO.
DENMARK
(No
report received)
FINLAND
(V. Sjöblom and E. Aro)
No work was carried out on demeraal fieh other than that
reported to the Baltic Fieh Committee.
_ 2 Species
~.,)
KO 01' sampl.es
01' sarnp1es
SeaSOll
Research
Area
Sole
IV
VII f,g
1
~teasureu
Agecl
11
110J
200
210
9
Hh2
)
12
1181
210
4
12
1250
210
1
5
4]7
200
7
b66
210
5
4
442
210
396
140
1
2
189
70
2
J
275
70
4
3
))6
210
1
2
140
140
2
2
110
110
)
2
1)0
IJO
4
2
1d5
70
2
2
)
4
VII a
~larkct
"
J
VII d,e
Plaice
IV
VII f, r;
1
11
660
120
2
ö
509
100
J
12
i51
1JJ
4
12
752
140
1
5
2Jd
120
2
"
J~.
I.>
1)0
J
1
40
40
1
2
2
)
99
147
40
4
:3
194
120
1
2
2
lUv
2U
100
4
VII a
40
)
VII d,e
J
4
1
20
- 3 -
~
(E. Mesnil)
I. CAMPAGNES SCIENTIFIQUES A LA MER
Le N/O "THALASSA" a participe, du 29 janvier au 2S fevrier 1984,
ä la campagne internationale Young Fish Survey. Ont ete effectuees 11 sta-
tions en IV A, 20 en IV B, 13 en IV C et 20 en VI A.
Les programmes de suivi des ressources en Golfe de Gascogne
(VIII A-B) se sont poursuivis ä bord du N/O "PELAGIA" avec les campagnes
trimestrielles SOLMER (23 stations du 10 au 19 fevrier, 27 du 7 au 16 juin,
28 du 8 au 17 aoüt et 3S du 28 octobre au 7 novembre 1984), et avec la
campagne annuelle CRUGAS (3S stations du 12 au 27 novembre 1984).
11. ECHANTILLONNAGE ET AGEAGE
Les operations d'echantillonnage ä terre et ä la mer sont resumees
dans les tableaux joints. Les remarques formulees dans le rapport d'activite
1983 s'appliquent egalement ä ces tableaux.
- 4 ---
-- -
--
---
NOMBRE D'EClIANTILLONS
ESPECE
L;eu no;r
MORUE
SECTEUR
CIEM
SAISON
NAVIRES DE
RECHERCHE
IV A
T
1er
2eme T
3eme T
4eme T
2
VI A
1er
7
T
2eme
3eme
4eme
T
T
T
1er
T
T
T
T
13
T
T
T
T
20
2eme
3eme
4eme
IV C
1er
2eme
3eme
4eroe
T
T
T
T
12
IV A
1er
T
14
IV A
2eme
3eme
4eme
IV B
VII A
1er
2eme
3eme
4eme
T
T
T
1er
2eme
3eme
4eme
T
T
T
T
APPORTS
COMMERCIAUX
NOMBRE DE POISSONS
MESUREs
ACEs
+
+
+
7
41
+
+
+
216
240
225
157
+
+
+
+
86
1 695
1 760
1 125
997
86
435
440
240
205
+
+
12
10
234
+
+
+
830
1 106
406
325
+
+
+
1 612
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
668
966
608
260
+
+
+
381
842
1 225
840
1 007
301
176
353
208
156
+
+
+
+
96
820
1 030
132
AUTRES
MESURES
- 5 -
NOMBRE O'ECHANTILLONS
ESPECE
MORUE
EGLEFIN
SECTEUR
CIEM
VII D
1er T
2eme T
3eme T
4eme T
VII F-G
1er
2eme
3eme
4eme
T
T
T
T
IV A
1er
2eme
3eme
4eme
T
IV B
VI A
MERLAN
SAISON
IV A
IV B
NAVlRES OE
RECHERCHE
APPORTS
COMMERCIAUX
NOMBRE OE POISSONS
,
MESURES
+
7
+
10
12
AGES
+
+
+
+
715
1 013
854
285
+
+
+
+
1
1
1
1
081
671
292
304
210
353
261
316
9
786
384
470
356
T
+
T
T
6
5
3 829
+
+
+
1er
2eme
3eme
4eme
T
T
9
+
+
+
+
+
+
+
1er
T
+
+
+
+
2 295
1 322
1 249
993
1 763
+
305
400
251
190
8
+
1 707
+
+
+
1 525
416
617
454
+
+
+
422
+
+
+
T
T
2eme
3eme
4eme
T
T
T
1er
2eme
3eme
4eme
T
T
T
1er
2eme
3eme
4eme
T
T
T
T
14
11
4
+
T
20
AUTRES
MESURES
- (, NOMBRE
ESPECE
MERLAN
MERLU
SECTEUR
CIEM
SAISON
D'ECI~ILLONS
NAVIRES DE
RECHERCHE
APPORTS
COMMERCIAUX
tlOMBRE DE POISSONS
MESURES
AGES
042
+
+
+
1 914
988
792
413
IV C
1er
2eme
3eme
4eme
T
T
T
T
13
+
+
+
+
~
VI A
1er
2eme
T
T
11
+
+
1 383
750
VII A
1er
2eme
3ieme
4erre
T
T
T
T
+
+
+
+
538
1 262
1 209
636
VII D
1er
2eme
3eme
4eme
T
T
T
T
5
2
3
1
VII F-G
1er
2e'lle
3eme
4eme
T
T
T
T
+
+
+
+
VI A
1er
2eme
3eme
4eme
T
T
T
T
3
9
3
10
26
289
70
315
VII
1er
2eme
3eme
4eme
T
T
T
T
13
14
15
6
471
584
594
243
+
+
+
+
1
2
2
2
821
014
119
256
1 918
972
776
413
352
417
378
449
AUTRES
MESURES
- 7 -
.
NOMBRE D'ECHANTILLONS
ESPECE
MERLU
SECTEUR
CIEM
SAISON
VIII
1er
NAVIRES DE
RECHERCHE
T
APPORTS
COMMERCIAUX
23
62
2eme
...
3eme
T
27
42
T
28
30
4eme
T
70
46
NOMBRE DE POISSONS
MESUREs
1
2
3
2
2
1
6
2
105
361
125
374
231
219
322
693
TACAUD
IV C
1er
T
10
1 413.
TACAUD NORVEGIEN
IV A
VI A
1er
1er
T
T
10
8
1 810
793
BAUDROIE
VI
VII ns
4eme
2eme
3eme
4eme
ns
T
T
T
1er
2eme
3eme
4eme
T
T
T
T
+
+
+
+
507
493
771
700
+
+
+
+
537
1 021
2 513
2 325
+
+
+
+
1
3
3
2
VII E-F
VII A-G
VII H +
VIII A .
470
458
291
651
+
+
173
82
75
339
5
6
6
11
T
ACEs
650
1er
T
2eme
3eme
4eme
T
T
T
1er
T
2eme
3eme
4eme
T
T
T
.
709
757
218
475
AUTRES
MESURES
- 8 -
NOMBRE D'ECllANTILLONS
ESPECE
BAUDROIE
SOLE
SECTEUR
CIEM
SAISOtI
VIII A
1er
2eme
3eme
4eme
T
T
T
T
+
+
+
+
VIII ns
1er
2eme
3eme
4eme
T
T
T
T
6
27
16
11
2eme
3eme
T
T
16
20
1er
T
23
IV C
VIII
NAVIRES DE
RECHERCHE
APPORTS
COMMERCIAUX
36
2eme
T
27
30
3eme
4eme
T
28
29
T
35
52
PLlE
IV C
2eme
3eme
T
T
16
20
LIMANDE
IV C
1er
2eme
T
T
16
3eme
T
20
4eme
T
6
8
CARDINE
VII ns
VII E-F
7
6
NOMBRE DE POIS30NS
MESURES
2
4
4
2
275
708
262
900
ACES
143
317
117
150
136
553
228
148
239
163
117
97
1 135
2 308
460
2 196
660
2 082
515
2 609
599
340
380
345
313
179
302
184
562
178
1 570
322
1 297
670
480
119
358
135
334
599
ns
500
1er
2eme
T
3eme
4eme
T
T
T
+
+
+
+
510
850
1 530
170
AUTRES
MESURES
- 9 -
NOMBRE O'ECHANTILLONS
ESPECE
CARDINE
SECTEUR
CIEM
VII A-G
SAISON
1er T
2eme T
3eme T
4eme T
VII H
1er
+ VIII A 2eme
3eme
4eme
T
T
T
T
NAVIRES OE
RECHERCHE
APPORTS
COMMERCIAUX
NOMBRE OE POISSONS
MESURES
+
+
+
+
1
3
3
3
870
400
740
910
+
+
+
+
1
3
4
2
870
740
080
890
AGEs
AUTRES
MESURES
- 10 -
GERMAN DEMOCRATIC REPUBLIC
(B. Vaske )
The following sampling of length and age distributions
has been carried out in 1984:
Species/
Area
Season
Quarter
No. of SamoIes
Research Icommercial
vessel
vessel
No. of Fish
Measured IAged
Greenland
halibut
IIb
III
27
2575
948
3449
264
13418
198
552
3326
1500
582
Redfish
IIa
IIb
IIb
XII
XIVa
XIVa
XIVa
II
II
III
II
I
II
III
20
1
13
2
7
19
5
624
100
340
879
Research vessel survey
Area
Spitsbergen(Svalbard)
Date
2.7.-9.7.1984
Objective
Redfish-Greenland
halibut survey
- 11 -
FEDERAL REPUBLIC OF GERMANY
(G. Rauck)
The biological sampling programme of demersal species on board research
vessels, commercial trawlers and on fish markets has been continued.
This sampling scheme, including length frequency measurements, otolith
samplings, single weights of fish, tagging of fish, stomach sampling, as
well as studies on fish density and distribution of demersal fish species
were carried out during ground fish surveys.
The monthly bycatch analysis of the shrimp fishery as weIl as joint investigations in the Wadden Sea area of Niedersachsen and Schleswig-Holstein
have been continued in spring and autumn together with vessels from the
Netherlands and Belgium.
Investigations on cod discards in the commercial fisheries and cod selectivity studies using mesh sizes of 90 and 100 mm mesh openings were carried out
in the German Bight.
The cod sampling scheme off Greenland has been intensified aiming at a stock
separation by means of different otolith structures.
A North Sea groundfish survey with special emphasis on the gadoid and
pelagic species covering the area IVa and b has been repeated.
Research vessel cruises related to the national sampling scheme of the
demersal species were as follows:
R.V. "Walther Herwig"
Months
ICES area
Objectives
Febr./March
V, VI, VII, XII, XIV
Groundfish and pelagic survey
July
VI
Groundfish and pelagic survey
R. V. "Anton Dohrn"
January
February
May
June/July
IVb
IVabc
IVb
IVab
Groundfish survey
IYFS
Groundfish survey
Groundfish survey
- 12 -
R. V. "Sol ea"
Months
leES area
Objectives
January
February
June
July
August
November
lVbc
lVbc
lVbc
IVb
IVb
IVab
Groundfish survey
Groundfish survey
Sole beamtrawl survey
Groundfish survey
Groundfish survey
Groundfish survey
Market Sampie.
Research Vessel Sampies
No. Of Fhh
No. of Flsh
Specie.
,\ren
Se .. on ~o. of
Sampies
Ideasured
Aged
Radsl
Inv.. stll!:alionn
No. of
Samples
Measure,l
Aged
Cod -,
IIa
I
II
IVa
I
II
1521
189
5
1
49
82
10
398
457
135
386
466
I
II
III
IV
135
194
125
111
9951
3362
117
3740
868
683
13
877
31
IVc
I
II
III
IV
19
440
77
Va
I+I I
11
900
VIa
II
III
27
26
111
68
III
822
170
-
IV
IVb
.
18531
13405
200
+
I
f-'
W
!
I
i
Research Vesael Sampies
Market Snmples
No. of Flah
SeuoD No. of
Sampies
Speeies
Arf!'ß
No. Of Fieh
Measured
Aged
Radal
Inveatilt-
No. of
Sampies
Mea.ured
ntionn
Alted
Co'd '
VIIbc
11
VIIf
VIIg-h
I
I
II
XIVb
14
3
7
17
33
18
37
38
I
II
I II +IV
IV
64
1280
795
4
39
10
1463
5786
496
4
1
721
230
385
1300
479
+
Haddock
IIa
I
II
IVa
I
II
III
IV
53
86
16
14885
20040
4800
390
195
1467
464
I
....
l'
:
!
I
i
------
Market SBmples
Research Vessel Sampie.
No. Of Fhh
No. of Fish
Speeies
Areß
8ea800: ~o. of
S8mple9
l1addock
!Vb
I
II
III
IV
VIa
lIea9ured
42
9066
4
13
3978
660
731
44
7425
10487
III
43
45
VlIb-c
11
22
583
VlIf
I
1
4
I
3
20
27
87
11
V1I9-k
II
Aged
Radal
tnveatign tionn
No. of
8ample9
483
Me Baure,l
Aged
-
-
-
2
1
2
1051
794
1082
539
138
482
I
I-'
V1
I
!
;
,
:
i
Research VC9sel Sample.
Market Samples
No. of Fieh
Seasoa r<o. of
Sample.
Specie.
t\rp-ß
Wh'iting'
IVa
ldeasured
IVc
VIa
I
II
III
IV
I
II
III
IV
I
II
VIIbc
II
18
276
VIIf
VIIg-h
I
I
11
III
4
7
15
41
535
739
330
1865
IVb
VIa
II
I
No. Of Fieb
Aged
49
80
14
4071
1539
3153
484
199
93
207
125
112
5
36
6066
7122
973
1239
720
4210
58
381
Racia 1
Inv.,.tijto tionn
No. of
Samples
Mea9ure,!
Aged
I
....,
'"
I
I
j
Research Vessel Sampies
Marl,et Samplee
No. oe Flsh
Speei es
Area
SeaSOD
No. oe
Sernples
lIeasured
No. oe Fiah
Aged
RBeial
Inv~stijl;-
No. oe
Sempie.
M~asured
atioon
Saithe
IIa
IVa
I
I
II
III
IV
1
501
501
1
3414
908
Aged
7
5
9
9
3
2791
2443
3828
3493
1324
1340
1468
1461
1428
671
Vb
II
4
1150
703
VIa
VI
VII
I
I
I
3
1227
674
1
1
167
12
167
12
Po 11 ack
IVa
VI
III
I
1
1
124
48
124
48
I
1
178
178
5
1
1
2
1059
143
200
500
Blue Ling
Vb
II
III
IV
579
148
L79
I
f-'
--J
I
~
;
I
Reseßrch Vcssel SampleA
MArket Snmple8
No. or Fieh
Specica
Are ..
Season No. or
Sampies
No. or Fhh
ldea9ured
RAcia 1
ARed
Inveati~-
No. or
Sample9
Me"9ured
Aged
6
2
1165
486
615
259
aHonn
Blue Ling
VI
III
2
1
555
184
555
184
III+IV
1
511
511
I
XIV
III
IV
Norway
Pout
IVa
IVb
I
II+III
49
77
4937
8627
I
II+III
20
42
1085
2518
I
'm""
I
I
~
;
;
I
!
•
Research Vesael Samplea
5••• 00 ~o, oe
Sampies
Spec1C8
,\rea
Marl,et Sampie •
No, oe Fiah
Measured
No, oe Fiah
Aged
R8dal
No, oe
InvP.8tig_
Sampies
Measured
ationn
Plaice
IVa
Aged
,
I
2433
3758
3206
2360
II
III
IV
IVb
62
130
121
182
3519
23712
14436
11793
I
5
231
I
1
150
121
119
11
7232
1994
1914
37
146
121
154
7638
14140
3331
16259
I
.ll
111
IV
IVc
Sole
IVb
II
III
IV
Dab
IVb
I
11
III
IV
:
470
740
613
450
'~'1
1028
2
3
2
874
1309
408
185
546
191
I
.....
-0
I
,
:
Market SampIes
Research Vessel SampIes
No. Of Floh
No. of Fl.h
Spedes
,\ren
SeasoD ~o. ot
SampIes
Measured
Aged
Rada 1
Investll!a tlonn
Dab ,
IVc
Flounder
IVb
I
1
250
I
II
6
79
256
496
III
IV
47
226
1
17
49
170
IVc
I
Turbot
IVb
II
No. ot
SampIes
MeRsure,l
Al!ed
2
88
58
11
1572
~reenland
~al ibut
XIV
IV
957
I
'"
0
I
I
i
,
!
Research Vesael S8mple8
M8rket S8mple8
No. of Flah
Se880D No. of
Samplea
Specie8
AreB
Measured
No. Of Fieh
Alted
R8d81
I nve" ti 11:ntlonn
No.
0
r
S8mplea
Mensure.1
Aged
,
Hake
II+IVa
1
2
3
2
III
I
I+II
III
VI +VII
37
255
645
242
37
255
645
242
I
~
I
I
,
j
:
Ms rke t Samp 1e s
Research Vessel Ssmp1es
Speci e ..
Area
Sea80n ~o. o(
Ssmp1es
S:marinus
I
XIV
II
III
IV
S.mentell a
I
XIV
II
III
IV
IJ.mentell a
I
Vb
II
S.marinus
IIa
-
-
-
4184
1436
2369
512
744
428
-
Samp1es
Mea.ured
Aged
1
501
-
-
-
-
-
-
1
320
-
-
500
-
261
378
288
-
3
1322
-
-
-
-
-
-
-
4
7
1
1517
3553
352
-
-
-
-
6
3
2454
1270
-
-
-
-
-
-
-
-
-
-
-
-
-
-
6750
3233
4911
I
IV
-
-
No. o(
-
-
III
Rad s1
Invp.atip;a ti onn
No. O( Flah
26
12
17
IV
II
Aged
Meaeured
23
9
10
-
III
,
No. o( Flah
393
929
165
803
309
I
I\)
I\)
I
,
:
;
-
ReseRreh Ve.sel 5ßmpleß
No. of Fleh
Speeie8 Seß.on ~o. of
Arp.8
Sample9
MacrourlIS
berglax
XIV
No. Of Fleh
Measnred
I
-
-
II
1
1II
4
4
61
919
102
IV
MRrl,et SRmple8
Aged
-
-
Rad al
Inv... till;ntionn
No. of
Sample9
Meß~ured
Aged
-
I
I
I
I\J
W
,
,
I
!
:
,
- 24 -
ICELAND
(No re port received)
IRELA:-;D
(R. Grainger)
Port sampling continued of commercial catches of cod, whiting and
haddock in Divisions VIa and VIIb, cod and haddock in Division VIb
and cod, whiting and plaice in Division VIIa.
A bea~ trawl survey for juvenile plaice in shallow water off the east
coast of Ireland in September was continued but the usual May survey
was not carried out.
Groundfish surveys in the Irish Sea aimed at assessing pre-recruit
whiting and cod were started in 1984 and were carried out in the
northwest Irish Sea in June and September.
Species
Cod
VIa
Killyb"gs &
Greencastle
1
2
3
4
VIb
Killybegs
2
VIIa
Howth,
Dunmore East
Kilmore Quay
1
2
3
4
VIIb
Rosaveal
1
2
3
4
Totals
17
19
20
10
730
736
446
209
432
465
1009
541
122
110
22
17
12
18
972
841
550
854
255
320
354
338
0
1
5
5
0
52
224
239
0
0
146
171
147
5975
4141
r
-~~---
-----
- 25 -
Port
Haddock
fish
aged
VIa
Killybegs &
Greencastle
1
2
3
4
9
10
15
14
1022
956
719
1036
385
947
203
294
VIb
Killybegs
3
4
513
184
VIIb
Rosaveal
1
2
3
4
0
3
4
1
0
212
194
128
0
0
83
89
60
4780
2185
Totals
Species
Whiting
Port
VIa
Killybegs &
Greencastle
fish
aged
1
2
3
4
11
1964
2554
1778
1639
174
392
301
266
8
11
13
VIIa
Howth
Dunmore East
Kilmore Quay
1
2
3
4
15
6
15
9
2117
1090
3193
1962
349
329
355
346
VIIb
Rosaveal
1
2
3
4
1
0
5
2
129
0
1181
520
0
0
170
73
VIIa
Skerries
1
2
3
4
8
2
2
4
877
68
100
420
42
35
0
155
120
19592
2987
Whiting
discards
Totals
- 26 -
Port
Plaice
VIIa
1
2
3
4
Howth
Dunmore East
Kilmore Quay
Totals
June
GroundfiO'h Surveys
Whiting
Cod
Plaice
No. caught
2749
67
684
No. of Stations
No. aged
177
67
424
26
Age Group
Ncs. caught
41
o
157
1685
998
1505
1074
598
392
242
370
53
5262
1602
September
No. aged
No. caught
3797
48
148
48
848
164
26
Beam Trawl Survey fer Plaice in September
No. of hauls
20
7
14
12
514
- 27 -
NETJlER LANDS
(F.A. van Beek)
In 1984 the market sampling of the Dutch landings was continued for the
following species: brill, cod, haddock, plaice, sole, turbot and whiting.
For roundfish the market sampling was stratified on area basis as in
previous years (figure 2 in Administrative Report of 1982).
Since January 1984 the stratification of the flatfish marked sampling is
based on fishing harbours.
In 1984 R.V. "lsis", a 28 metres long stern trawler, joined the fleet of
research vessels. This vessel was build especially for the coastal zones
and the deeper parts of the estuaries. It will take over part of the
surveys previously carried out by charters and by R.V. "Stern".
In April/May and September/Oktober two Demersal Young Fish surveys,
directed to 0-,1- and 2-group plaice and sole and brown shrimps were
carried out in the continental nurseries from the English Channel to
Jammer Bay. These surveys are carried out since 1969 in collaboration
with Belgium and the Federal Republic of Germany. For The Netherlands
R.V. "Tridens". R.V. I1I8is''. R.V. "Stern'" R.V. IIS c hol1evaar snd the
charter GO 29 participated in both surveys.
i
I
I
I'
From April to June a number of sole egg surveys were carried out in the
southern and central North Sea and in the Waddensea and Zeeland estuary
by R.V. "181s", R.V. "Tridens, R.V. "Stern" and R.V. "Schollevaar" 1n
collaboration with Belgium, Federal Republic of Germany and Uni ted
Kingdom. The major aims of these surveys were to estimate the egg
production of sole in the North Sea and to determine the localisation
of the major spawning sites.
In February R.V. "Tridens" and R.V. "lsis" participated in the
International Young Fish Surveys (IYFS). These surveys are carried out
yearly since 1960.
In October/November R.V. "Tridens" and R.V. "lsis" carried out a survey
in the southern North Sea with the GOV trawl directed to roundfish. This
survey is held since 1980.
In the period February - April five larval surveys were done in the
Waddensea by R.V. "Stern" and R.V. IIIsis". In these surveys the
migration of plaice larvae in this area is investigated.
In order to estimate the level of discards of commercial species in the
Dutch fishery six trips were made on board of commercial vessels fishing
for roundfish.
SAMPLING DATA FOR
S~LE
19S4
- 28 -
,
NBRS.
AREA
cr rieh eSlDpled
MA R K E T
PERlOn
lDeasured
r;orth Sea
3rd
4th
li'addenseaestuary
2nd
4th
2nd
3rd
625
-
....
143
t.
46
-
..
137
-
t.
..
......
106
-
1st quarter
2nd
3rd
4th
Golf of Biscay
..
7E:2
1st ll.uarter
4th
Irish
Sea
-
1c47
1755
919
825
....
1st quarter
3rd
Zeelandestuary
sged
sged
1st quarter
2nd
RES.Veseel
331
-
~
-
1st quarter
2nd
••
3rd
4th
....
....
165
-
-
1st qusrter
2nd
3rd
4th
11
••
....
..
1st qusrter
2nd
3rd
4th
-
SAMPLING DATA FOR LAB
1~84
- 29 -
,
NBRS.
AREA
PERIOD
HARKET
mesllured
North Sea
3rd
4th
Waddenseaestuary
3rd
4th
Zeelandestuary
..
.."
aged
1188
1158
-
......
1st quarter
2nd
aged
RES.Veslle1
-
18t quarter
2nd
ot fillh Ilsmpled
198
91
....
..
....
-
1st lluarter
2nd
42
3rd
4th
52
-
l8t quarter
2nd
3rd
4th
..
1st quarter
2nd
3rd
4th
....
"
1st quarter
2nd
3rd
4th
......
18t quarter
2nd
3rd
4th
"
"
"
~
SAMPLING DATA FOR BRILL 1964
- 30 -
NBRS.
.lREA
PER IOD
MA R K E T
meallured
llorth Sea
lat quartar
2nd
3rd
4th
Waddensea-
estuary
••
788
814
665
1224
aged
336
509
312
387
RES.Veaael
sged
49
56
-
1st quarter
2nd
3rd
4th
Zeelandestuary
..••
....
of riah aBmpled
-
..
-
-
lat ,uarter
2nd
• t
3rd
4th
.t
..
-
7
..
1st quarter
2nd
3rd
4th
t.
t'
..
lat quarter
2nd
t.
3rd
4th
tt
..
lat quarter
2nd
tt
3rd
4th
tt
••
lat quarter
2nd
tt
3rd
4th
....
-0 • • · · - -
SAMPLING DATA FOR TURBOT 1984
- 31 NBllS.
AREA
MA R K E T
PERIOD
measured
North Sea
Waddenseaestuary
1at 'luarter
2nd
1253
1312
,3rd
4th
1354
1645
......
....
..
2nd
4th
....
..
....
t t
1st 'lu.rter
2nd
••
,3rd
4th
....
1st 'luerter
2nd
,3rd
4th
....
tt
....
1at 'luarter
2nd
3rd
4th
..
135
127
-
1at 'luarter
2nd
,3rd
4th
290
553
292
376
eged
11
1st 'l.uarter
,3rd
aged
RES.V.aael
-
1st 'luarter
2nd
,3rd
4th
of fiah aempled
A
- 32 -
SAMPLlNG DATA FOR FLAICE 1934
,
NBRS.
AREA
PERlOn
MARKET
measured
North Sea
Waddenseaestuary
Zeelandestuary
RES.Vessel
aged
2844
1663
1348
1439
1st quarter
2nd
3rd
4th
cf fish ssmpled
..••..
....
aged
2055
2054
-
1st qusrter
2nd
416
3rd
4th
386
-
..
-
1st llusrter
2nd
3rd
4th
100
tt
••
-
••
168
18t quarter
2nd
••
3rd
4th
..
••
..
1st qusrter
2nd
3rd
••
4th
tt
18t quarter
2nd
••
3rd
4th
••
••
.
1st quarter
2nd
3rd
4th
·••.
~
II
- 33 -
SAMPLING DATA FOR COJ 1984
I
I
NBRS,
AREA
PERIOD
....
....
1
1st quart.r
2nd
3rd
4th
••
2
1st quart.r
Central North
Sea
2nd
3rd
4th
..
......
......
..
..
....
..
....
..
3
1st lluarter
North Western
North Sea
2nd
3rd
4th
73
-
-
3rd
4th
"
6
1st quarter
Southern
North Sea
2nd
3rd
4th
7
1st qu.rter
Eastern
North Sea
2nd
3rd
4th
Total
Annually
-
-
73
112
86
-
-
157
50
20
-
-
-
-
205
185
42 9.•
2nd
-
-
2nd
1st quarter
30
-
-
460
5
15
54
447
1st quarter
South Western
North Sea
ag.d
94
476
100
4
4th
ag.d
50
212
328
197
Western
North Sea
3rd
RES.Vesul
MARKET
....sur.d
Northern North
Sea
of f:l.sh ss ..p1.d
-
-
100
41
236
588
1055
282
74
105
100
72
2012
1542
1416
2044
275
253
140
584
223
-
13
50
13
50
40
-
23
565
-
-
-
-
13
21
11490
2744
1549
.
SAHPLING DATA FOR IIADDOCK 1954
- 34 -
NBRS. of fieh eampled
AREA
PER IOD
HARKET
meaeured
1
let quarter
~orthern
2nd
North Sea
3rd
~th
......
....
..
2
let quarter
Central
North Sea
2nd
3rd
~th
......
....
3
1st lluarter
North Western
North Sea
2nd
3rd
4th
4
1st quarter
Western North
Sea
2nd
3rd
~th
5
South Western
North Gea
..
....
1st quarter
2nd
3rd
~th
..
....
6
1st quarter
Southern
North Sea
2nd
3rd
~th
7
Eastern North
Sea
aged
aged
152
263
-
-
29
169
120
163
-
-
-
138
220
80
-
-
-
-
-
-
243
274
149
46
158
101
165
6
138
52
115
174
389
442
-
-
-
-
-
45
.
-
1
29
-
-
77
-
-
-
56
25
67
75
155
103
-
-
1st quarter
2nd
-
-
89
50
}rd
37
-
-
-
27
31
2658
999
996
~th
Total
Annually
..
-
RES.Veeeel
....
..
-
- 35 -
SAMPLING DATA FOR WHITING 1984
I
NBRS. ot fiah aampled
.lREA
MA R K E T
PERIOD
meallured
,
Northern North
Sea
2
Central North
Sea
1st quarter
211d
3rd
4th
211d
3rd
..
••
"
-
8?
111
154
-
-
52
130
70
-
-
89
200
-
-
-
-
131
aged
-
53
34
-
-
.
-
97
-
-
-
-
-
175
lat quarter
390
107
2nd
507
100
789
84
100
-
32
62
2333
1902
194
100
227
1190
1994
100
418
634
-
-
-
4th
"
..
"
1st quarter
2nd
3rd
4th
"
"
"
lat quarter
211d
3rd
4th
Total
Annually
.."
68
43
3rd
7
Eastern North
Sea
..
aged
-
290
81
80
lat quarter
3rd
6
Southern
North Sea
"
-
211d
4th
5
South Western
North Sea
....
1st lluarter
211d
4th
4
Western North
Sea
..
1st quarter
3rd
4th
3
North Western
North Sea
"
"
-
RES.Vusel
"
"
"
-
-
-
-
-
-
37
70
10058
1570
1689
- 36 -
~
(D. Dutkiewicz)
No research data on demersal fish in the Northeast Atlantic
were collected by Polend in 1984.
PORTUGAL
(A. M. Caramelo and F. Cardador)
Biological sampling program
The program for demersal species was continued by INIF
(Instituto Nacional da Investigac~o des Fescas), in 1984,
at the most important Portuguese fishing harbours and on
board of research vessels.
The following tables present the sampllng data concerning
hake (Merluccius merluccius), bib (Trisopterus luscus),
Black scabbard-flsh (Aphenopu8 ca~bo) and some species of
seabre~~s. (Sparus aagrus, Pagellus erythrinuB, Diplodu8
vUlgaris, Pagellus acarne, PagelluB bogaraveo, BeeRS beops
and Spondyliosoma cantharus).
- 37 -
Tab1e 1 - Hake (Mer1uccius
"rea
Sea san
(quarter)
IXa
1
2
3
4
st
nd
rd
th
Number of samp1es
Research
vesse1s
-
1 st
2 nd
3 rd
4 th
TOTAL
1984
fish
13
1 008
106
110
94
880
63 471
1 295
•• no rac~al
in INIP
Table 2 - Bib (Trisopterus
IXa
of
'\ged.
15 537
18 257
13 969
15 708
• Ta be aged
Seasen
(quarter)
Number
rlarket deasured
samp1es
243
241
187
209
54
27
TOTAL
. 1984
Area
mer1uccius L.)
-
-
71
~nvest~gat~on
luscus)
Number ef samples
Research
vessels
racial...
invest.
Market
samples
200
149
147
Number of
Measured
189
13
9
9
13
685
45 598
• no racial Studies in INIP
800
406
081
311
Aged
-
-
-
fish
racial.
invest.
- 38 -
Table 3 - Black scabbard-fish
Area
Season
(quarter)
Research
vessels
IXa
NQ of fish
NQ of sampies
Market
sampies
Measured
34
-
6
7
5
717
449
455
Year
19B4
34
18
1 621
-
Racial _
invest.
-
st
nd
rd
th
1
2
3
4
Aged
_ No racial studies in INIP
Table 4 - Sparus
Area
IXa
Season
(quarter)
1
2
3
4
st
nd
rd
th
Year
1964
pagrus
NQ of sampies
Research
vessels
Market
sampies
-
27
27
26
21
112
261
70
214
1
101
657
1
-
Measured
NQ of fish
Aged Racial _
invest.
_ No racial studies in INIP
Table 5 - Pagellus
Area
IXa
Seasen
(quarter)
erythrinus
NQ ef sampies
f'larket
vesse1s
samp1es
Research
NQ ef fish
Aged Racial _
invest.
Measured
2 nd
11
487
Year
1984
11
487
• Ne racia1 studies in INIP
- 39 fable 6 - Diplodus
Area
IXa
Season
(quarter)
vulgaris
No of sampies
Research
vessels
Market
sampies
No of fish
Measured
2 nd
15
1 066
Year
1984
15
1 066
Aged
Racia1 _
invest.
_ No racial studies in INIP
fable 7 - Pagellus
Area
Season
(quarter)
acarne
No of sampies
Research
vessels
IXa
Market
sampies
No of
Measured
fish
Aged_
1 st
2 nd
3 rd
-
52
23
75
80
1 262
3 270
4 155
4 th
-
65
3 400
77
63
74
85
Year
1984
23
272
12 087
299
-
Racial_
invest.
_ Otoliths and scQles collected not read
._ No racial studies in INIP
lable 8 - Pagellus
Area
Season
(quarter)
bogaraveo
No of sampies
Research
vessels
1 st
<- nd
~
IXa
:3 rd
4 th
Year
1984·
;~arket
-
31
17
12
-
10
.1easured
sampies
10
-
No of
1 754
302
193
11
174
7:i.
2 423
.. No racial studies in INIP
Mged
fish
Hacial
invest.
..
- 40 _
Table 9 - Soops
Aree
Saason
(quarter)
boops
No of samples
Resaarch
vessels
lXa
1
2
3
4
st
nd
rd
th
Year
1984
Market
samples
-
No of
-
29
48
61
49
1 779
3 070
2 068
2 799
21
187
9 716
21
-
fish
Aged
Mea sured
Racial •
invest.
• No racial studies in INIP
Teble 10 - Spondyliosoma
Aree
Seesan
(quarter)
centharus
No of samples
Research
vessels
lXa
1
2
3
4
st
nd
rd
th
Year
1984
-
Market
samples
No of
Measured
-
36
38
41
43
465
411
435
720
6
158
2 031
6
• No racial studies in INIP
Aged
fish
Racial •
invest.
~1lfll'},I!!G J)A'J'I, j,'OH
..
N ~ O}' ~A!''J'lJI;S
I
AI{EA
VI
SEASON
I
II
111
HESW,HCH
Vl~~EL ~I
I
!
IV
VII
I
II
III
·IV
VIIIa, b
IV
I
Ir
38
III
32
IV
IXa
65
I
11
III
IV
24
I
;
I
(rev1sed)
1983
4
485
1
16
16
15
5564
3
AG],"
I
~:"'"lA'> 1l!V~". ~
6311
4480
4058
4813
48
11716
6460
24644
11204ö4-50
9618
53
I
I-
112
3661'
4260
44
72
61
59
57
N ~ O~' J"I~J(
----,
451
35
39
39
54
i
I
----------
"A~"'Ll'" ""ASU~~~
14
35
I
II
III
VIIIc
,,"'ItJ(b'T
Hake
....
3t$45
18865
6298
19
26
358
555
470
307
170
12
.....
"<l
~
•
Iod
.,
.,o
(l)
(I)
~
'-'
"Cl
ICIl
~.e~ >-'
C'
~
!
I
AHEA
I
VII
S?:ASON
HESr:AHCIf
I
II
III
IV
I
I
VIlla. b
I
II
III
I
IV
VIIIc
I
I
II
III
IXe.
I
II
III
IV
NI! Oi' l"1SI
lÖS
25
19
,
I
I"lAHY.ET
~Al\jJ'LI~
l\J~ASUHED
1a
9
9
9
5277
2604
2044
2517
30
43 .
61
50
2640
5668
5639
5557
23
84
75
IV
I
VU;~EL
1984
Hake
Al ;P;,Il!G JJAT/, i'OH
NI! Ol!'~Ah.l'JJ
32
17
26
40
33
21
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- 48 -
SWEDEN
(B. Sjöstrand)
Sweden took part in the International Young Herring
Survey in the North Sea and the Skagerrak. However,
it has no other activities on which to report owing
to reduced opportunities.
- 49 -
!!:.§ili
(M.P. Siaaenwine)
The USA did not fish or eonduct research within the ICES region during
1984. USA eonducted extensive studies relevant to demersal fish in the
Northwest Atlantie. This work is reported in detail to the Northwest
Atlantie Fisheries Organization. Only a few highlights are given here.
Ouring 1984. 2208 biologieal samp1es of 180.123 speeimens were eollected
portside for 36 speeies (ineluding 22 demersal speeies) in the NW Atlantie.
An additional 453 samp1es of 32.236 speeimens were eo1leeted aboard eommereia1
fishing vesse1s.
The USA continued standardized stratified random bot tom trawl surveys
for the twenty second eonsecutive year. Approximate1y 800 stations were
samp1ed. Icthyoplankton surveys continued six times per year. Age was
determined for 49.546 speeimens eolleeted from both eommereial fisheries
and research surveys.
Numerous speeifie problems were researched during 1984.
that are of broad interest are noted be10w.
Three studies
Ouring 1984. the Northeast Fisheries Center shifted the focus of its
recruitment studies from larval to juvenile fish.
2
Cruises using two types of pe1agie year. a 1 m mouth opening Boothbay
Oepressor Trawl (BBOT) and the International Young Gadoid Pelagie
Trawl (IYGPT) to samp1e pelagie juveniles and the 36 Yankee Bottom Trawl with
and without rollers for demersal juveniles. The entire bank was surveyed.
An aggregation of juvenile eod and haddock was located on the Northeast
Peak in about 60-80 m of water. Very few juveniles were found elsewhere on the
bank. The aggregation persisted in essentia11y the same 10cation for four
months. Four thousand fish stomachs were examined in order to identify
predators. There was a wide range of young fish in the stomachs of windowpane.
fourspot flounder. winter skate. litt1e skate. 10nghorn scu1pin. goosefish and
sea ravens. but cod and si1ver hake were not feeding heavi1y on fish.
A study of larval and juvenile winter f10under oto1iths was eonducted in
order to interpret subannual growth markings and aid in identifying the
first true annu1us. Winter flounder sampies were reared under eontrolled
eonditions from the egg stage to at least one year from hatch and eompared to
wild sampies. A seanning eleetron mieroseope was used to examine the interna 1
otolith strueture. EVidenee indieates that the sma11est growth ring identified
approximates a 24-hour light/dark eyele inerement. Ring counts eompi1ed from
over 200 individual observations showed a high degree of variation in elarity
and number of rings and their spaeing on otoliths of a known age.
Automatie optieal fourier transforms were used to examine haddock seal es
with various ages representing two different geographica1 areas in the Northwest
Atlantie. One method of analysis invo1ved the fitting of exponential and linear
eurves on the computer to the eireuli differenees per annu1us for eaeh seale
age. The method is promising for distinguishing between haddock from Georges
and Browns Banks.
- 50 -
U.S.S.R.
(S.A.Studenetsky)
In 1984 further investigations to estimate the abundance
of the mein commercial fishes were conducted through the trawl
aurvey, possible recruitment to cod, haddock, redfish end
other fieh stocks was studied by means of ichtbyoplankton
and young fiah surveys in the Barents Sea and adjacent waters~
The relationship between the peculiarities of fish
dJl.atributlon end behav1our~ on tbe one hand, end b;ydrological
conditions and food supply, on the other, was .:rUrther reveeled~
The stock structure of mein cOllllllflreial :fiahes, their biological indices end migrations were
investigated~
In the year under consideration the data relating lengthage
c~position,
distribution end feeding of cod, haddock,
redfishes, wolffishes, Greenlsnd halibut and other fiabes
were sampled in tbe mein leES regionsi Subarea I, Diva. IIa
end
IIb~
The data collected in 1984 by research, ecouting
end commercial ships are listed in Tables 1-8~
- 51 -
Table 1. Biolog1cal data on cod, 1984
---------------------------r---Humber of fieh, spec.
Period, :
lCES
regions
: quarter
:
; of tu ;yea~ meesu:red
. sxwlysed
.
: for feediJ:lS;
aged
-------------------------------2077
863
10191
I
Division
Division
IY
II691
25390
9398
1797
3128
1613
I
II
III
IY
82
8582
17135
5754
75
724
2934
644
100
871
200
I
II
44215
4594
207
5124
1546
578
137239
19712
II
Subarea I
m
IIs
IIb
m
777
600
600
900
50
IY
Total
5489
- 52 -
Table 2~ 13101og1cal data on haddock, 1984
- IW- - - -:-Färicid;
-:- : quarter of
- ;~e::;;;'8-;,- ;~~~
:-_..;;;.;;;;;;;;;..;.;;;.~;...;;;.~...:-..;:..
regions
: the year : measured
:
:
: anal;ysed
feediDg
~or
- - - -_
aged
-------------------------------I
29172
1259
803
BubareaI
II
llJ
IY
D1vi sion II a
I
II
llJ
IY
Division 11 b
I
II
llJ
14700
S€67
777
272
II2
23
9200
272
439
389
IIII
400
185
897
1265
234
234
5390
1826
I
IY
Total
64396
- 53 -
Table 3~ Biological data on redfish, 1984
- - -IOE-S- - - :- -Pär1Od~- :-
regioDS
: quarter of :
. he
•
: ~
year :
- -
-N- -b - -f-:: -h - - - - - - - -
um er 0 ...... a. spec.
measured
.analysed
.
: for feeding:
aged
-------------------------------186
II213
Subares' I
I
TI
rn
rJ
Division II a
25
179
18
1
II
lil
6970
6061
5635
II43
II80
747
750
55
1
II
30478
3530
27363
2728
3453
400
700
1300
200
105521
10505
3300
r.r
Division TI b
6665
7247
III
600
500
rJ
Total
- 54 -
Table 4~ Biological data on Greenland halibut~ 1984
- - - - - lCES
regions
Subarea I
~
PeriÖd; -:- - -
Division
a
rr b
~
•
. analysed
.
; tor teed1ng;
- - - - -aged
I
79
94
379
80
240
190
lI1
IY
1282
30
3036
405
I
TI
ill
1072
38
61
391
22
200
1638
790
I
rr
'
rr
ill
IY
Division
;~~;~ -;~; :~;
. quarter of.
: the year : measured
rr
690
190
400
25
1Y
Total
6476
- ')')
Table 5. Biologicel data on saithe, 1984
-------------------------------: Period, :
Number 01' !iah, spec~'
lCES
regions
: quarter 01' :
: the ;Teer
: JDaasured
ana1Ysed
~ for feeding
~
aged
-------------------------------Subarea I
Di.vision II a
I
II
lJl
IY
I
II
lJl
810
31
485
40
225
2
1Y
Division II b
I
II
4167
685
510
124
IJ.]
313
63
6687
768
400
IY
Total
400
- ')6 -
Table 6~ Biological data on wolffishes, 1984
------------------------------I
Subarea
rr
I
522
86
6I
I58
lJ
753
25
IY
46
2I
2I
I32
82
I
Division
Division
11 a
rr
b
rr
IO
IJI
I348
IY
499
I
I47
7I
rr
IJI
IY
Total
46
3600
- <;7 -
Teble 7~ :Biologieal data on :plaice~ 1984
- -leEs - :-:quarter
PeriOd; -.- of:
regions
• 1;he
- - ;- ~ - - ;- - ~ - - -.:"" - - - - - um er 0 fis. s:pec.
: analysed for.
;
: feeding
•
..
.
year : measured
:
aged
--------------------------------400
444
1839
I
Subarea I
n
m
IY
~vision
n a
372
6273
13755
II87
1275
760
300
I
n
m
1Y
Division nb
I
n
m
IY
Total
22239
2906
1460
- 58 -
Table 8~ Biological data on long rough dab~ 1984
----------~--------------~-----: Period~
:
lOES
Number 01' fiab, sllee~
regions
: quarter of :
: J116asured
: the year
• enal;ysed
: 1'or feeding :
aged
-------------------------------Subarea I
5012
891
5029
961
125
125
607
50
IOO
500
IY
II5
2469
3359
25
475
200
200
I
1054
75
394
25
184
II
I
II
m
1Y
Division lla
I
II
m
Division
llb
m
IY
Total
18965
2026
984