·
.....
r
International Council for the
Exploration of the Sea
C.M. 1991/0: 1
Report of Activities
DEMERSAL FISH COMMITTEE
by
Niels Daan
1990
•
c
·
,
Table of Contents
BELGIUM
CANADA
DENMARK
FAROES
FEDERAL REPUBLIC OF GERMANY
FINLAND
FRANCE
ICELAND
IRELAND
TIffi NETIffiRLANDS
NORWAY
roLAND
PORTUGAL
SPAIN
SWEDEN
UNITED KING DOM (England and Wales)
UNITED KINGDOM (Scotland)
U.S.A
U.S.S.R
2
4
5
11
14
20
21
29
33
36
41
46
47
49
53
54
55
56
57
> '
- 2-
BELGIUM
(R. de Clerck)
Densities and growth rates of the 1989 and 1990 year classes of sole, plaice, dab, flounder,
cod and whiting were recorded. Two cruises were undertaken for this purpose according to
the criteria of the International Demersal Young Fish Survey. The beam trawl survey was
continued in order to estimate the stock size of adult flatfish in the southern North Sea in
August. This was part of an international survey in collaboration with the Dutch and
English Institutes.
The market sampling programme was continued covering cod (North Sea), whiting (North
Sea, haddock (North Sea), plaice and sole (North Sea, English Channel, Celtic Sea and
Irish Sea (see tables).
1990
SAMPLING DATAFOR: SOLE
Nr of fish
Nr of sampies
Area
IV
1
2
3
4
VIIf,g
1
2
3
4
VIIa
1
2
3
4
VIId
1
2
3
4
VIII
..
I
I
Season
1
4
BELGIUM
Res. vesscls
Markcl
Measured
Aged
1
-
6
4
10
8
560
350
1896
770
140
140
331
140
7
9
2
2
630
825
160
150
210
210
160
150
3
8
4
2
240
730
422
150
230
60
70
150
3
1
230
60
175
80
230
60
70
80
280
140
70
140
2
1
1
2
I
-3SAMPLING DATA FOR:
1990
Nr offish
PLAICE
Nr of sampIes
Arca
IV
VIIf,g
Season
Res. vessels
1
3
4
VIId
1
2
Agcd
6
388
454
1679
532
100
100
357
100
2
438
576
80
90
150
140
80
90
3
4
4
2
116
202
209
90
116
130
40
90
3
1
2
120
50
122
40
120
50
50
40
1
-
2
1
2
3
4
MC<1sured
-
1
2
3
4
VIIa
l\larkcL
3
4
SAMPLINGDATAFOR'
6
10
8
7
9
2
1
1990
Nr offish
eOD
Nr 01' sampies
Area
IV
Season
Res. vessels
MarkcL
Mcasured
Aged
1
-
7
2
350
100
376
300
350
100
100
300
1
2
3
4
SAMPLING DATA FOR:
2
6
1990
Nr offish
WHITING
Nr 01' sampies
Area
IV
•
Season
1
2
3
4
Res. vessels
MarkcL
Mcasurcd
Aged
1
-
10
3
400
135
145
270
400
135
120
270
3
6
BELGIUM
BELGIUM
BELGIUM
-4-
CANADA
(R.O'Boyle)
Canada had no fisheries and no research vessel activity on demersal fish in the lCES area in
1990. Activities in the N0l1hwest Atlantic have been reported to NAFO.
-5-
DEN MARK
(H.Gislason)
The RN "Dana" made 12 cruises in 1990. Apart from the intemationally coordinated
standard surveys (lA, 2, 7), these were aimed at investigating the effect of eutrophication
and oxygen deficiency (3, 4, 11), sprat recruitment (lB), sandeel biology (5), catchability
of trawls (9) and plankton productivity (6,10).
The programme for collecting sampIes from the human consumption fishery was continued
in 1990 at the same level as in previous years. The number of market sampIes is given in
the tables as the number of boxes collected, each of which contains app. 35 kg of fish.
Very few sampIes were collected from the industrial fishery in 1990 due to a reorganization
of the sampling scherne. The few sampIes obtained from this fishery weigh between 5 and
10 kg each.
R.V "Dana" Cruises 1990
e
lB)
Period
29 Jan. - 16 February
16 - 20 February
Purpose
Int. Young Fish Survey
Sprat Investigations
Area
North Sea
North Sea
2)
7 - 23 March
Baltic Young Fish Survey
The Baltic
3)
24 - 27 March
Environmental investigations
Kattegat
4)
28 April - 7 May
Flatfish diseases
North Sea, Skagerak,
Kattegat
5)
12-21May
SandeelInvestigations
North Sea
6)
25 May - 4 June
Frontal studies
North Sea
7)
9 - 18 June
MackereI Egg survey
North Sea
8)
24 July - 12 August
Int Herring Acoustic survey
North Sea, Skagerak
9)
23 - 30 August
Catchability
Skagerak
10)
15 - 28 October
Plankton Investigations
Skagerak
11)
2 - 7 November
Environmental investigations
Kattegat
12)
14 -27 November
Pandalus Survey
North Sea
Cruise no
lA)
-6SAMPLING DATA FOR:
1990
WHITING
Nr of sampies
Area
Season
22
4
4
lIla (N)
1
2
4
lIla (S)
1
2
3
4
IV
1
2
IVa 0V)
3
IVb
1
3
Res. vessels
Market
Measured
Aged
-
1
1
1
1
-
8
9
1
282
198
323
280
198
10
Industrial
Industrial
Industrial
13
1
1
907
137
327
236
881
137
327
236
Industrial
Industrial
Industrial
Industrial
4
1
10
5
10
5
Industrial
Industrial
1
3
-
Industrial
2
2
20
6
20
5
-
SAMPLING DATA FOR:
IIIa(N)
Season
1
2
3
4
1
2
4
lIla (S)
3
4
IVa (E)
1
2
3
IVb
1
IV
1
2
3
4
3
-
1990
HADDOCK
Nr of sampies
Area
DENMARK
Nr offish
Fishery
Industrial
Mixed fishery
Industrial
Industrial
DENMARK
Nr offish
Res. vessels
Market
Measured
Aged
-
5
5
4
4
5
6
1
1078
779
1 193
949
22
36
18
1076
779
1 191
949
22
36
-
Human cons.
Human cons.
Human cons.
Human cons.
Industrial
Industrial
Industrial
1
1
5
5
5
5
Industrial
Industrial
1
1
2
1
16
7
1
16
7
Industrial
Industrial
Industrial
1
107
107
Human cons.
3
2
4
2
1
175
342
533
309
2
175
341
533
308
2
Human cons.
Human cons.
Human cons.
Humaneons.
Industrial
Fishery
-7 SAMPLING DATA FOR'
1990'
eOD
Arca
22
1
2
3
4
24
1
2
3
4
25
1
2
3
4
lIla (N)
lIla (S)
IVb
IV
•
Season
Res. vessels
Market
Measured
Aga!
-
12
9
5
10
777
713
298
655
774
712
292
653
Human cons.
Human cons.
Human cons.
Humaneons.
3
3
1
3
666
298
241
513
660
297
241
513
Humaneons.
Human cons.
Human cons.
Human cons.
8
5
1
1
1371
1079
294
336
1369
1077
294
335
Human cons.
Human cons.
Human cons.
Humaneons.
6
5
6
5
7
5
1
739
498
558
704
45
16
37
739
497
557
702
45
16
-
Human cons.
Humaneons.
Human cons.
Human cons.
Industrial
Industrial
Industrial
10
5
4
7
9
1
643
259
237
418
12
1
642
258
237
418
12
1
Humaneons.
Humaneons.
Human cons.
Humaneons.
Industrial
Industrial
3
3
2
1
264
284
186
69
261
284
186
69
Human cons.
Human cons.
Humaneons.
Human cons.
10
5
608
361
542
422
601
361
542
422
Humaneons.
Humaneons.
Human cons.
Human cons.
-
-
1
2
3
4
1
2
4
-
-
1
2
3
4
1
4
-
1
2
3
4
-
1
2
3
4
-
8
6
-
SAMPLING DATA FOR:
1990
SAITHE
Nr of sampies
Arca
Season
Res. vessels
1
2
3
4
2
-
IVa (E)
3
IV
1
2
3
4
-
lIla (N)
DENMARK
Nr 01' fish
Nr of sampies
-
-
Fishery
DENMARK
Nr offish
Market
Measured
Aga!
Fishery
2
2
2
2
1
173
225
204
126
1
173
225
204
126
-
Human cons.
Human cons.
Human cons.
Humaneons.
Industrial
1
1
-
Industrial
3
2
2
2
284
141
245
68
284
141
245
68
Human cons.
Human cons.
Human cons.
Human cons.
-8SAMPLING DATA FOR'
1990
SILVERY rOUT
I Nr of sampies
Arca
IVa (E)
Scason
I
Res. vessels
Market
Mcasurcd
1
I
-
1
5
SAMPLING DATAFOR'
lIIa(N)
Scason
1
4
IVa (E)
1
2
3
IVa (W)
3
IVb
1
1
IVa (E)
1
2
3
Fishcry
-
3
9
1
12
1458
117
12
1458
-
Industrial
Industrial
Industrial
1
1
1
42
1
42
Industrial
Industrial
5
1
2
750
102
362
750
102
362
Industrial
Industrial
Industrial
1
96
96
Industrial
1
1
-
Industrial
-
1990
ßLUE WIIITING
IVa (E)
Market
Mcasurcd
Agcd
Fishery
-
1
1
Industrial
1
1
1
11
10
55
-
lila (S)
55
Industrial
Industrial
Industrial
DENMARK
Nr of fish
Res. vcsscls
Markct
Mcasurcd
Agcd
Fishery
-
2
2
-
Industrial
1990
Nr of sampies
Scason
10
1990
ARGENTINE
SAMPLING DATA FOR: SrOTTED DRAGONET
Arca
DENMARK
Res. vessels
1
DENMARK
Nr offish
Res. vesscls
Market
Mcasurcd
Agcd
Fishcry
-
1
3
-
Industrial
1
SAMPLINGDATAFOR:
•
Nr of fish
Nr of sampIes
Scason
DENMARK
Agcd
SAMPLING DATA FOR:
Arca
Industrial
Nr offish
Nr of sampies
lila (N)
- I
Mcasurcd
-
Scason
Fishery
Markct
SAMPLING DATA FOR:
Arca
I
Agcd
Res. vcsscls
1
2
4
lila (S)
I
1990
NORWAY rOUT
Nr of sampies
Arca
DENMARK
Nr of fish
GREY GURNARD
1990
I Nr of sampies
DENMARK
Nr of fish
Arca
Scason
I
Res. vcsscls
Market
Mcasurcd
Agcd
Fishery
IVb
1
I
-
1
1
-
Industrial
•
-9-
.
SAMPLING DATA FÜR'
1990
Nr offish
SANDEEL
Nr of sampies
Arca
Scason
IIIa (N)
2
IIIa (S)
2
IVa (E)
1
2
IVb
2
2
IV
3
Res. vessels
Market
Mcasurcd
Agal
Fishery
-
1
194
194
Industrial
2
464
104
Industrial
1
1
121
108
108
-
Industrial
Industrial
1
2
130
233
118
233
Mixed fishery
Industrial
1
113
113
Industrial
1
-
SA~1PLING DATA FÜR:
1990
Nr of fish
PLAICE
Nr of sampies
Arca
IIIa (N)
lIla (S)
IVb
IV
Scason
Market
Mcasurcd
Agal
-
5
5
5
4
2
1
1
1 129
1621
1655
1363
4
1
1
1057
1497
1546
1278
1
Human cons.
Human cons.
Human cons.
Human cons.
Industrial
Industrial
Industrial
10
9
6
7
3
2153
1829
1018
1739
3
2071
1754
995
1675
Humancons.
Human cons.
Humaneans.
Human cons.
Industrial
4
1
2
2
1
835
977
697
1 152
825
971
692
1143
I
-
Human cons.
Human cons.
Human cons.
Human cons.
Industrial
4
6
935
2394
2608
1164
919
2360
2574
1 144
Humancons.
Humancons.
Humancons.
Human cons.
1
2
3
4
1
2
4
-
1
2
3
4
1
-
.
1
2
3
4
1
-
-
1
2
3
4
10
5
EUROPEAN FLOUNDER
Nr of sampies
22
Scason
IVA (E)
3
I
.
1990
Nr offish
DENMARK
I
Mcasurcd
Agal
I
-
2
147
145
I
'VITcn FLOUNDER
I Nr of sampies
I
-
Market
1
Scason
Fishery
Res. vessels
SAMPLING DATA FÜR'
Arca
DENt-.1ARK
Res. vessels
SAMPLING DATAFÜR:
Arca
DEN~1ARK
1990
Nr of fish
Res. vessels
~furket
Mcasurcd
.
1
1
Fishery
Human cons.
DENMARK
Agal
-
Fishery
Industrial
- 10SAMPLING DATA FÜR:
1990
Nr offish
SOLE
Nr of sampies
Area
lIla (S)
Season
1
2
3
4
IV
2
3
DENMARK
Res. vessels
Market
Measured
Aged
-
3
3
3
2
308
301
222
267
308
300
222
266
Human cons.
Human cons.
Human cons.
Human cons.
2
1
231
208
230
207
Human cons.
Human cons.
Fishery
•
b
- 11 -
FAROES
(J .Reinert)
The sampling programme for eommercial eatehes of saithe, eod, haddoek, ling, blue ling,
Greenland halibut and redfish was eontinued in 1990. In addition sampIes of the species
mentioned were taken from research vessel eatches. The tables provide more details.
The following research cruises with relevance to the Demersal Fish Committee were made
in 1990:
In January RIV "Magnus Heinason" carried out exploratory fishery with bottom trawl S
and S\V of the Faroes for grenadier fish.
In January-February the commercial trawler MIS "Phoenix" was chartercd to carry out
exploratory fishery for grenadier and black scabbard fish to the Sand S\V of the Faroes.
In February RIV "Magnus Heinason" carried out an exploratory fishery with bottom trawl
for redfish around the Faroes.
•
In February-March RIV "Magnus Ileinason" continued the Faroese Groundfish Surveys
specially designed to obtain information on the stock sizes of saithe, eod and haddoek. In
addition to the usual biological sampIes, stomachs of selected fish species were sampled as
apart of the Faroese Stomach Sampling Programme.
In March-April RIV "Magnus Heinason" carried out exploratory fishery with bottom trawl
for Norway pout around the Faroes.
In May RIV "Magnus Heinason" carried out O-Group Surveys in Faroese waters to get
information on the year-class strength of saithe.
In May-June RIV "Magnlls Heinason" carried out a combined acoustic and trawl survey to
get information on the distribution of silver smelt in Faroese waters.
In May-July the commercial longliner MIS "J.C.Svabo" was chartered to carry out
exploratory fishery with traps for tusk and ling in Faroese waters.
•
In June-July RIV "Magnus Heinason" eontinued the O-Group Surveys in Faroese \Vaters
to get information on the year-class strength of eod, haddock, Norway pout and sandeel.
In June-July the commercial trawler MIS "Skardhamar" was chartered to carry out an
exploratory fishery with bottom trawl around the Faroes for flatfish, particularly lemon
sole.
In July RIV "Magnus Heinason" carried out a Groundfish Survey around the Faroes as a
part of the Faroese Stomach Sampling Programme. This Groundfish Survey was eontinued
in September.
In October-December selection studies were carried out with RIV "Magnus Ileinason"
using different trawls and different designs of the codend.
On all cruises with RIV "Magnlls Heinason" biological sampIes are taken as a routine for
most fish species from almost every haul and the measurements are entered into the vessel
computer automatically. Since all data have not been edited yet, the number of sampIes and
measurements by species for 1990 ean not be given at this stage exeept for selected species
in the Faroese Groundfish Surveys in February-March.
- 12SAMPLING DATA FOR'. eOD
1990
FAROES
Market
Research vessel
Arca
Scason
Vb
1
2
3
4
N Sampies NMcasurcd
...
NAgcd
N SampIes
NMcasured
NAgcd
298
36
23
28
53
5559
4007
3959
8515
749
348
398
649
5393
...
...
...
SAMPLING DATA FOR'
1990
IIADDOCK
FAROES
Market
Research vessel
Arca
Scason
Vb
1
2
3
4
N SampIes NMcasurcd
...
...
...
...
SAMPLING DATA FOR'
NAged
N SampIes
N~1easurcd
NAgcd
315
23
6358
4003
4561
10 175
349
202
251
350
7691
11
18
35
1990
SAITIIE
FAROES
Market
Research vessel
Arca
Vb
Scason
N SampIes NMcasurcd
...
1
2
3
4
...
...
...
SAMPLING DATA FOR:
NAgcd
4245
N Samples NMeasured
307
35
24
17
43
1990
NORWAY POUT
Season
Vb
1
2
3
4
N Sampies
NMeasurcd
NAgcd
NSampIes NMcasured
...
4
1
4
10
...
Scason
Vb
1
2
3
4
N Sampies
NMeasurcd
NAgcd
N Sampies NMeasurcd
Scason
Vb
1
2
3
4
N Sampies
...
...
...
...
NMcasurcd
NAgcd
NAgcd
-
487
11
317
367
1990
FAROES
Research vessel
Arca
200
50
200
500
FAROES
2
1
2
2
Sebastes me1ltella
NAged
Market
...
...
...
...
SAMPLING DATA FOR'
236
133
409
977
1990
Research vessel
Arca
•
Market
...
...
SAMPLING DATA FOR'. Sebastes mari1lus
350
292
250
598
FAROES
Research vessel
Arca
7179
5450
4210
9771
NAged
Market
N Sampies NMcasured
3
3
3
12
880
716
659
8033
NAgcd
-
-
•
- 13SAMPLING DATA FOR:
1990
TUSK
FAROES
Research vessel
Area
Season
Vb
1
2
4
NMeasured
N Sampies
NAged
Market
N Sampies NMeasured
2
1
3
*
*
*
SAMPLING DATA FOR:
Season
Vb
1
2
4
N Sampies
NMeasured
NAged
Market
N Sampies NMeasured
*
*
*
SAMPLING DATA FOR:
1
2
311
3
449
•
Season
Vb
1
2
3
4
N Sampies
NMeasured
NAged
Market
N Sampies NMeasured
2
3
1
6
*
*
*
*
SAMPLINGDATAFOR:
GREENLAND HALIßUT
Season
Vb
1
2
3
4
*
•
N Sampies NMeasured
*
*
*
*
Not possible to quantify at this stage (see text).
NAged
NAged
-
195
435
67
650
1990
FAROES
Research vessel
Area
FAROES
Research vessel
Area
NAged
48
1990
BLUE LING
FAROES
Research vessel
Area
-
496
185
1 355
1990
LING
NAged
Market
N Sampies NMeasured
1
2
2
2
177
522
555
167
NAged
-
- 14-
FEDERAL REPUBLIC OF GERMANY*
(G.Rauck)
The biological sampling programme of demersal species on board of research vessels,
commercial trawlers and on fish markets has been continued.
A comprehensive sampling scheme, including length frequency measurements, otolith
sampling, individual fish weights, tagging of fish, stomach sampling, as weIl as studies on
fish density and distribution of demersal fish species was carried out during groundfish
surveys.
The monthly by-catch analysis of the shrimp fishery has been continued, as weIl as the
joint investigations in the Wadden Sea area of Niedersachsen and Schleswig-Holstein
(Young Fish and Brown Shrimp Survey) 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
different mesh sizes were carried out in the German Bight.
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 folIows:
Months
leES area
Objectives
R.V. "'Valther lIerwig"
January
February
Febr./March
May/June
June/July
Sept./October
Oct.1N ovember
IVb
IVa,b,c
VIa,b
IV
IVa,b
XIVa
IIa,IVa,Vb
XIV
Groundfish survey (fish disease)
IYFS
Groundfish and pelagic sUrvey
Groundfish survey (fish disease)
Groundfish survey
Groundfish survey
Groundfish survey
R. V." Solea"
January
Febr./March
June
June/July
September
Nov./December
December
IVb,c
IVb,c
IVb
IVb,c
IVb
IVb,c
IVb,c
VIId
Groundfish survey
Groundfish survey
Sole beam trawl survey
Groundfish survey
Groundfish survey
Groundfish survey
Groundfish survey
R.V."Ernst Haeckel"
May/June
XII
Groundfish survey
* The sampling programme of the former German Democratic Republic has been included in the tables.
•
- 15 SAMPLING DATA FOR:
Area
•
Season Nr samp.
Meas.
Agcd
Ha
2
4
11)
2491
363
IVa
1
2
3
482)
232)
122)
753
497
106
497
463
99
IVb
1
2
3
3
4
4
1342)
1372)
642)
213)
12)
43)
1932
2644
1421
73
31
5
914
1180
722
IVc
1
2
4
62)
222)
92)
66
73
95
64
69
69
IVb
1
2
3
4
94)
94)
344)
34)
26
96
7
Via
1
92)
85
77
VlIe
1
12)
3
-
VlIb,c
1
22)
3
1
Vlh·k
1
22)
9
2
-
SAMPLlNG DATA FOR:
-
Market sampling
Nr of fish
Othcr
Season Nrsamp.
Meas.
Agcd
4
2
1265
1088
600
525
-
11
F.R.G.
1990
IIADDOCK
Meas.
Agcd
Ha
1
4
11)
1212
229
IVa
1
2
3
532)
202)
72)
8739
2137
945
648
248
104
IVb
1
2
3
262)
322)
102)
3320
2917
510
691
522
91
VlIb,c
1
42)
65
44
22)
-·13
1
33
1) SampIes laken on board of commercial trawler
2) Groundfish surveys
3) Young Fish and Brown Shrimp Survey
4) Shrimp bycatch investigations
VIIl!-k
Nrsamp.
-
Research vessels
Nr of fish
Area
F.R.G.
1990
COD
Research vessels
Nr of fish
Market sampling
Nr of fish
Othcr
Nr samp.
4
2
Mcas.
Agcd
290
1 109
104
431
- 16SAMPLING DATA FOR'
Scason Nrsamp.
Mcas.
Aged
IVa
1
2
3
502)
202)
72)
11949
1 591
1237
490
173
134
IVb
1
2
2
3
3
4
4
1172)
792)
663)
512)
213)
412)
743)
13917
14388
432
8930
673
8145
2224
333
757
IVc
1
2
4
22)
222)
192)
99
73
1953
IVb
1
2
3
4
94)
734)
944)
144)
56
1581
2903
424
VIa
1
82)
1554
104
Vllb,c
1
32)
196
92
Vlld
4
72)
636
-
Vlle
1
12)
175
70
VlIg-k
1
22)
258
55
SAMPLING DATA FOR:
Other
•
Agcd
-
1
1
162
VlIg-k
1
5
673
Other
4
XIV
3
4
I
- I
Mcas.
Agcd
-
I
78
1
-
-
3) Young Fish and Brown Shrimp Survcy
4) Shrimp bycatch investigations
,
Nrsamp.
Mcas.
Aged
I
FRG
. . .
Market sarnolinl!
Nr 01' fish
Other
Nrsamp.
Meas.
Agcd
-
1
235
116
78
2
1
581
324
298
167
-
1) Sampies taken on board of commercial trawler
2) Groundfish survcys
I
I
1990
Research vessels
Nr of tish
Vb
Market sarnpling
Nr of fish
I
ßLUE LING
Scason Nr samp.
F.R .G.
1990
I
I
I
Arca
Aged
-
Mcas.
VIa
Meas.
126
ßLUE WIIITING
Scason Nr samp.
SAMPLING DATA FOR:
Nrsamp.
307
Research vessels
Nr offish
Arca
Market sarnpling
Nr of fish
I
Research vessels
Nr of fish
I
Arca
FRG
. . .
1990
'VIIITING
- 17 SAMPLING DATA FÜR:
Arca
Ha
IVa
VII
Season Nrsamp.
Agcd
I
üther
Nrsamp.
Meas.
Agcd
-
-
-
-
-
2
1
3
729
421
1415
1081
220
703
1
2
3
4
2
1 138
500
4
6
8
7
2145
2747
3619
4108
1055
1504
1858
2067
1
1
1
-
Scason Nrsamp.
284
-
284
-
66
62
-
1990
SOLE
Research vessels
Nr of fish
Meas.
Agcd
4453
710
-
IVb
2
902)
IVc
4
1
20
IVb
2
3
4
763)
313)
133)
787
141
23
IVb
1
2
3
4
174)
1014)
824)
34)
146
1507
583
4
Season Nrsamp.
Meas.
Agcd
IVa
1
2
3
12)
152)
62)
40
981
673
-
IVb
1
2
2
3
3
4
4
832)
902)
1263)
372)
433)
362)
543)
5622
11684
3119
4791
1010
2979
1515
-
IVc
2
4
22)
52)
137
415
VHd
4
12)
42
-
IVb
1
2
3
4
204)
834)
634)
134)
258
1614
1155
387
-
-
F.R.G.
Market sampling
Nr of fish
üther
SAMPLING DATA FÜR·. DAß
Research vessels
Nr of fish
Arca
Market sampling
Nr of fish
1
3
4
SAMPLING DATA FÜR:
Arca
Meas.
FRG
. . .
1990
SAITIIE
Research vessels
Nr of fish
Nrsamp.
Meas.
3
1472
Agcd
.
FRG
. .
1990
Market sampling
Nr 01' fish
üther
Nrsamp.
Meas.
Agcd
- 18SAMPLING DATA FOR:
Arca
Aged
Scason Nrsamp.
Mcas.
58
60
3367
IVa
2
3
14
11
IVb
1
2
2
3
3
4
4
732)
1302)
1433)
442)
423)
262)
823)
4252
3906
5616
1225
1 851
803
3865
IVc
1
2
4
62)
12)
42)
26
1
82
IVb
1
2
3
4
234)
1314)
1234)
134)
2445
10891
15064
738
SAMPLING DATA FOR:
Market sampling;
Nr of flsh
Nrsamp.
Other
Mcas.
IVb
1
2
4
22)
22)
32)
61
198
193
IVb
2
3
4
923)
433)
413)
926
303
110
IVb
1
2
3
4
214)
944)
1034)
94)
161
567
807
80
-
132
Arca
Aged
Market sampling;
Nr 01' flsh
Othce
Research vessels
Nr 01' flsh
I
XIV
Season INr samp.
4
I
1
I Mcas.
I
305
F.R.G.
1990
Nrsamp.
SAMPLING DATAFOR'. GREENLAND IIALIßUT
I
I
Agcd
125
FLOUNDER
Scason Nr samp.
Mcas.
-
Research vessels
Nr of fish
Arca
F.R.G.
1990
PLAICE
Research vessels
Nr of fish
Aged
305
1) Sampies taken on board of commercial trawler
2) Groundfish surveys
3) Young Fish and Brown Shrimp Survey
4) Shrimp bycatch investigations
Market sampling
Nr 01' fish
I Nrsamp.
I
Agcd
FRG
.
1990
I
I
Other
Meas.
Meas.
Agcd
•
- 19SAMPLING DATA FOR:
Area
IVb
Season INr sarnp.
I
Meas.
Agcd
I
I
229
65
2
3
53
SAMPLING DATA FOR·
Area
1
XIV
3
4
61)
14
74
.
SAMPLING DATA FOR·
Aged
881
223
3 139
10253
225
590
Meas.
Agcd
1
2
XII
3
13
4262
600
XIV
2
3
4
50
23
35
16973
3268
3835
1 SOO
340
350
1
4
6
2703
340
.
XII
Season INr samp.
2
I
3
I
Meas.
Agcd
I
I
130
130
Other
I
S07
Agcd
200
1) SampIes laken on board of commercial trawler
2) Groundfish surveys
3) Young Fish and Brown Shrimp Survey
4) Shrimp bycatch investigations
2
FRG
·
Market sampling
Nr 01' f1sh
I
·
Meas.
Agcd
1 I
413
200
I
I
1990
Other
·
Nrsamp. I
I
FRG
·
Market sampling
Nr of tish
· ·
Nrsamp.
Meas.
Agcd
1
1
816
655
238
2
755
150
2
3
633
2205
150
170
Corvl1h . rUllestr;s
I Meas.
F.R.G.
Market sampling
Nr 01' f1sh
I
I Nrsamp.
1990
1990
Research vessels
Nr of fish
I
I
I
Area
Other
S ebastes mentella
Research vessels
Nr of tish
Season Nr samp.
SAMPLING DATA FOR'
•
Meas.
Vb
?
I
I
S ebastes mar;nus
Research vessels
Nr of f1sh
Season Nrsamp.
Ha
Area
1990
TURBOT
Research vessels
Nr of f1sh
I
I
I
I
I
Other
FRG ·
Market sampling
Nr of fish
I
· ·
I Nrsamp.
I
I
I
Meas.
Agcd
L
- 20-
FINLAND
(E. Ara)
No work was carried out on demersal fishes other than that reported to the Baltic Fish
Committee.
•
- 21 -
FRANCE
(A.Souplet)
SAMPLING DATA FOR:
1990
WHITING
Nr of sampies
•
Area
Season
IVa
FRANCE
Nr offish
Res. vessels
Market
Measured
Aged
1
16
1980
577
IVb
1
29
-
4791
1365
IVc
1
1
2
3
4
25
-
12
3
955
270
-
3
3
3
3
896
1 114
646
879
609
697
641
636
VIIa
1
VIId
1
4
4
-
13
570
942
1 173
-
8
7
10
835
1
433
1
-
1 151
925
-
-
307
905
-
VIIf,g
1
2
3
4
VIIg,j+
VlIIa,b
4
43
-
1301
397
VIIh,g,j
4
16
-
263
VIII
1
1
2
2
3
3
4
4
-
4
13
4
12
6
-
215
717
235
881
502
884
292
363
-
26
36
-
27
-
VIlla
4
19
-
665
VlIIb
4
8
-
373
SAMPLING DATA FOR'
1990
HADDOCK
Nr of sampies
FRANCE
Nr of fish
Res. vessels
Market
~feasured
Aged
1
16
1960
746
IVb
1
10
-
572
340
Via
1
2
3
4
-
29
18
20
36
1908
1389
1257
2731
-
-
13
-
54
-
Area
Season
IVa
VIIl!.h.i
4
-
- 22-
SAMPLING DATAFOR'. COD
1990
Res. vessels
Area
Season
IVa
1
16
IVb
1
25
IVc
1
4
12
FRANCE
Nr offish
Nr of sampies
Market
Measured
Aged
-
185
163
335
299
-
66
3
-
61
225
7
8
4
6
1 136
1312
1032
1241
315
391
315
344
1
117
-
Via
1
2
3
4
VIIa
1
-
VIId
4
17
-
90
45
VIIf,g
1
2
3
4
-
4
7
5
3
431
513
718
439
307
321
440
293
VIIg,h.i
4
25
-
52
-
SAMPLING DATA FOR'
1990
SAITHE
Nr of sampies
Res. vesseIs
Market
Measured
Aged
1
5
-
14
14
1
2
3
4
-
-
60
53
-
59
1815
1873
2077
2034
373
358
401
388
11
-
26
-
Area
Season
IVa
Via
VIIg,h ,i
FRANCE
Nr offish
4
SAMPLING DATA FOR:
60
1990
POLLACK
Nr of sampIes
Area
Season
VII
1
2
VIIe
VIlla
Res. vessels
PRANCE
Nr 01' fish
Market
Measured
Agcd
163
108
-
338
193
1
2
-
8
5
692
589
. 22683
4
8
-
15
-
•
- 23SAMPLING DATA FOR:
1990
BIß
Nr of sampies
Area
Season
IVb
IVc
VIId
Res. vessels
Market
Measured
Agtx1
1
3
6
1
1
2
3
9
-
-
-
1
2
3
4
4
4
4
6
6
11
12
-
31
7
VIIg,j+
VIlla,b
4
55
VIlla
4
29
VIIIb
4
21
SAMPLING DATAFOR:
-
NORWAY POUT
205
331
369
474
158
317
229
736
1227
1404
2805
802
234
245
301
743
332
2472
515
740
-
1723
1990
Nr of sampies
FRANCE
Nr 01' fish
Res. vessels
Market
Measured
Agtx1
1
16
-
1440
185
1
5
-
281
28
Area
Season
IVa
IVb
SAMPLING DATA FOR:
1990
HAKE
Nr of sampies
Arca
FRANCE
Nr offish
Season
Res. vessels
FRANCE
Nr 01' fish
Market
Measured
Aged
VI
1
-
13
619
-
VII
1
2
3
4
-
2
12
21
15
116
335
-
VIIg,h,j
4
67
-
2131
VIlla
4
73
10660
VIllb
4
43
-
VIII
1
1
2
2
-
68
30
42
68
3 103
2592
3450
5396
-
779
398
3176
-
-
,.-----------
----
- 24SAMPLING DATA FOR:
1990
LING
FRANCE
Nr 01' fish
Nr of sam les
Market
~1easured
Aged
1
2
8
5
764
884
69
VIIc2+
VIIf,j+
VIIla2
1
2
3
4
3
3
2
3
701
1005
445
721
310
753
213
314
VIII
3
3
4
4
42
2325
7579
2399
3607
Arca
Season
VIIc
Res. vessels
47
56
35
1990
FRANCE
Nr 01' fish
Arca
Season
VIa
1
2
Res. vessels
SAMPLING DATA FOR:
~1easured
Aged
137
513
70
240
1990
MEGRIM
Nr 01' samples
Arca
Season
VIA
1
2
3
VII
1
2
3
4
VIII
1
2
3
4
VIIg,h,j
4
61
VIlla
4
36
VIIlb
4
19
Res. vcssels
Markct
Measured
Agcd
-
-
254
217
263
136
101
159
4482
3752
3749
2741
389
317
386
301
2095
3343
2408
2388
-
SAMPLING DATA FOR:
RED GURNARD
611
125
127
1990
Nr of sampIes
Arca
Season
VIId
1
2
3
4
FRANCE
Nr of fish
FRANCE
Nr offish
Res. vessels
Market
Measured
Agcd
-
4
10
578
614
303
259
280
232
257
192
5
5
- 25SAMPLING DATAFOR'. BASS
1990
Nr offish
Nr of sampies
Area
Season
VIIe
1
2
Res. vessels
Market
Measured
Aged
-
8
5
286
198
108
36
SAMPLING DATAFOR:
BLUE WHITING
Nr of sampies
Area
Season
1990
Nr offish
FRANCE
Res. vessels
Market
Measurcd
Aged
-
5935
-
7576
-
3696
-
VIIg,h,j
4
59
Villa
4
63
Vlllb
4
28
SAMPLING DATA FOR'
1990
Nr of fish
PLAICE
Nr of sampies
FRANCE
Res. vesse1s
Market
Measurcd
Aged
1
13
263
58
IVb
1
27
694
537
IVc
1
1
2
3
4
11
-
374
935
1228
936
123
148
2026
1082
1876
329
589
275
Area
Season
IVa
Vlld
•
FRANCE
-
1
1
1
3
-
-
16
23
27
1
2
3
4
4
23
-
VIIg,h,j
4
7
VIlla
4
6
-
16
-
27
16
-
11
-
562
300
-
- 26SAMPLING DATA FüR:
1990
Nr of fish
DAß
Nr of sampies
FRANCE
Res. vessels
Market
Measured
AgexI
1
15
923
235
IVb
1
28
3887
521
IVc
1
4
13
5
-
1270
55
236
27
Vlld
1
2
3
4
4
21
-
7
12
12
971
1 174
1299
601
913
130
164
164
543
VIIg,h,j
4
6
VIlla
4
6
VIIIb
4
2
-
Area
Season
IVa
SAMPLING DATA FüR:
Area
Season
IVa
1
IVb
1
IVc
VlId
26
17
LEMON SOLE
I
I
I
I
I
4
I
-
30
I Nr of sampies
4
1
-
6
Res. vessels
Market
12
-
12
-
I
I
I
~
~
14
-
1990
Nr offish
Measured
Aged
198
140
37
29
I
3
47
33
I
96
62
FRANCE
- 27-
1990
SAMPLING DATA FÜR: SOLE
Nr of sampies
•
Res. vessels
Market
Measured
Aged
1
7
14
1
1
2
3
4
6
-
-
Area
Season
IVb
IVc
Vlld
FRANCE
Nr offish
-
-
1
2
3
4
4
Vlle
1
2
VIII
1
1
2
2
3
3
4
4
1
3
1
29
241
292
320
104
136
247
221
204
-
4
-
-
23
20
35
30
39
-
32
2462
797
3001
129
1597
8
5
2017
358
33
1885
479
2027
565
2394
202
2114
589
8
-
32
41
34
-
26
-
31
Villa
4
7
Villb
4
8
SAMPLING DATA FÜR:
16
1099
970
372
34
WUITE ANGLER·
1990
-
10
-
17
16
19
341
112
581
97
554
30
556
48
1
1
2
23
2
30
3
3
4
4
21
Villa
4
9
VIIg,h,j
4
14
VII+VIII
1
2
3
4
-
*Lophius piscatorius
-
-
FRANCE
Nr offish
Measured
VIII
-
10
Market
Res. vessels
Season
308
18
Nr 01 sampies
Area
-
-
-
22
x
x
x
x
11
20
4230
4170
4200
4325
Aged
-250
245
240
260
- 28SAMPLING DATA FOR'
ßLACK ANGLER·
Nr of sampies
Arca
Season
1990
Nr offish
FRANCE
Res. vessels
Market
Mcasured
Agcd
VIIg,h,j
4
10
-
13
-
VII+VIII
1
2
3
4
-
x
x
4220
4430
4400
4550
160
175
170
180
x
x
*Loo/zius budegassa
SA~1PLING DATA FOR'
1990
Nr offish
RED MULLET
Nr of sampies
Arca
VlIIa,b
Season
Res. vessels
Market
Mcasured
37
-
8
10
494
546
573
546
681
336
1
2
2
3
4
4
-
10
12
-
31
SAMPLING DATA FOR:
VI
Season
FRANCE
Mcasured
Aged
-
x
x
81
140
132
81
140
132
x
1990
Nr of fish
NEPHROPS
Nr of sampies
FRANCE
Res. vessels
Market
Measured
16
-
482
-
6
896
2083
450
2580
506
3985
372
2271
-
588
-
63
-
VIIh,h,j
4
VIIla,b
1
1
2
2
3
3
4
4
27
VIlla
4
19
5
4
4
-
VIIIb
4
12
-
19
40
30
•
Nr offish
Market
2
3
4
Season
-
Res. vessels
SAMPLING DATA FOR:
Arca
Aged
ROUNDNOSE GRENADIER 1990
Nr of sampies
Arca
FRANCE
Aged
•
- 29-
ICELAND
(1. MagmIsson)
The bioIogicaI sampling programme and research work on demersal fish was carried out
along the same lines as in previous years and is thus based both on research vessel data and
market sampies.
The greatest part of the research vessel data was collected during the annual groundfish
survey in March. The survey is carried out simultaneously with five commercial stern
trawlers of the same type covering the whole shelf area around Iceland with some 600
trawling stations.
Market sampIes were collected at the headquarters of the Marine Research Institute in
Reykjavfk and the five branches of MRI Iocated at other important fishing ports. Fishery
inspectors collected a considerable amount of data both on board of commercial fishing
vessels and at the landing places.
•
Emphasis was laid on assessment work, as usual, and steps were, taken to increase studies
on species interactions.
One short cruise was directed towards the oceanic-type S. mentella in the Irminger Sea.
Some data from commercial catches from this stock were also collected. These data are not
included in the following rabIes, which show the number of fish sampled by species.
SAMPLING DATA FOR:
1990
Nroffish
COD
Nr of sampies
Arca
Scason
Va
1
Res. vesscls
Markct
Mcasured
AgOO
11
109 587
14301
18444
7161
45291
1447
23879
1126
5939
3156
1 111
2677
2618
700
1334
501
191
221236
18036
1426
96
2
118
3
346
4
247
69
15
•
2137
Total
SAMPLING DATA FOR:
1990
Nr offish
HADDOCK
Nr of sampIes
Arca
Scason
Va
1
Res. vcssels
Markct
Measured
Aged
24
74264
2890
16475
2445
15612
1914
12602
3593
2229
946
327
700
715
650
888
830
87
129795
7285
866
24
2
92
3
124
4
111
21
18
Total
1 193
lCELAND
ICELAND
- 30SAMPLING DATA FOR:
1990
Nr offish
SAITHE
Nr ofsam les
Area
Season
Va
1
Res. vessels
Market
Measured
Aged
5
9542
4064
2874
978
4686
1 195
1034
422
1839
1344
301
500
547
400
164
200
60
24795
5295
454
33
2
18
3
68
4
17
12
10
Total
557
SAMPLING DATA FOR:
1990
Nr of fish
LING
Nrofsam
Area
Season
Res. vessels
Va
1
3
4
121
Total
121
SAMPLING DATAFOR:
Va
Season
344
48
SAMPLING DATA FOR:
Aged
223
3
3
76
2
3
5
229
76
1990
Nr offish
TUSK
Area
Va
Season
1
Res. vessels
290
3
4
Total
Market
10
2
290
12
Countcd
•
135
Measured
Nrofsam les
ICELAND
5
1990
Nr offish
48
Total
135
11
Res. vessels
1
328
11
BLUE LING
3
4
Aged
8
3
Nr of sam les
Area
Measured
lCELAND
Measured
Aged
1446
19
1911
5
1470
1911
lCELAND
Countcd
lCELAND
Countcd
•
- 31 -
.
SAMPLING DATA FOR'
1990
S ebastes marinus
Nr of sampies
Area
Season
Va
I
Res. vessels
Market
Measured
Aged
382
355
8
50726
3232
1662
1623
7323
3174
1543
2626
29
71909
1437
543
9
2
11
3
70
4
41
4
8
664
Total
.
SAMPLING DATAFOR'
•
Season
Va
1
Res. vessels
Market
3
4
3
6
54
SAMPLING DATA FOR:
•
1231
217
783
419
248
986
97
4
393
8
4277
Season
Res. vessels
Va
1
3
4
182
Total
182
SAMPLING DATA FOR:
Market
Measured
Agcd
2
2
3688
503
340
238
100
198
4
4531
536
1990
DAß
Res. vessels
Market
Season
Va
1
108
2119
Total
108
2119
Measured
GREAT. SILVERSMELT
Va
1
3
Total
Res. vessels
Market
Aged
1990
Nr of sampies
Season
ICELAND
Nr of fish
Area
Area
ICELAND
Nr offish
I
Nr of sampies
SAMPLING DATA FOR:
97
1990
PLAICE
Nr of sampies
Area
ICELAND
Aged
2
Total
150
Measured
2
4
161
Nr offish
41
2
389
1990
Sebastes mentella
Nr of sampies
Area
ICELAND
Nr offish
ICELAND
Nr offish
Measured
Aged
54
9
2511
968
168
63
3479
168
- 32SAMPLING DATA FOR'
1990
CATFISII
Nr 01' sampies
Res. vessels
Arca
Scason
Va
1
2
3
454
Total
520
.
SAMPLING DATA FOR'
Markct
1\'1easurcd
Agcd
2
2
16123
158
149
1664
200
100
8
16429
1964
1990
LUI\IPSUCKER
Scason
I
Va
1
2
II
Total
Res. vessels
Market
Measurcd
21
1671
2140
21
3811
250
250
SAMPLING DATA FOR:
Scason
Va
1
Res. vessels
Market
Scason
193
1
4
368
100
200
5
2114
300
GREENLAND IIALIßUT
Va
1
Res. vessels
Market
1990
1
59
17110
26
54
72
Total
143
SAMPLING DATAFOR:
Measurcd
1 199
715
293
10185
2585
155
4
3
4
HALIßUT
Scason
Va
1
Total
I
I
Res. vessels
I
•
lCELAND
Markct
Agcd
156
1 107
715
1978
1990
I Nr of sampies
Arca
Counted
Nr offish
45
2
lCELAND
Agcd
Measurcd
Nr ot sampies
Arca
Counted
1746
4
SAMPLING DATAFOR:
Aged
Nr offish
193
Total
ICELAND
1990
WITCII
Nr of sampIes
Arca
Counted
Nr 01' fish
I Nr 01' sampies
Arca
ICELAND
Nr offish
I
ICELAND
Nr of fish
Measurcd
Agcd
119
248
143
119
248
143
•
- 33-
IRELAND
(E. Fahy)
The demersal section carried out the following young fish surveys in 1990:
1) lrish Sea Juvenile Plaice Survey. May. This survey is carried out annually along
the east coast of Ireland (Division VIIa) from Carnsore Point to Dundalk Bay. The survey
has been earried out sinee 1980 at 43 pre-detennined stations using a 3 m beam trawl with
1 cm mesh. operated from a ehartered fishing vessel. The results are used to eonstruct
recruitment indices and are presented annually to the ICES lrish Sea - Bristol Channel
\Vorking Group.
•
2) lrish Sea Young Fish Survey. June and September. This survey is earried out
biannually on the gadoid nursery grounds in the north-west lrish Sea (Division VIIa). The
survey has been carried out since 1982 at 34 pre-detennined stations using a standard otter
trawl with eod end liner. operated from the state research vessel RV "Lough BeItra". The
results of these surveys are used to eonstruet recruitment indices and are presented annually
to the ICES lrish Sea - Bristol Channel Working Group.
3) Iris \Vest Coast Young Fish Survey. November. This survey is earried out
annually along the west coast of Ireland from the mouth of the Shannon to Tory Island
(Divisions VIIb and VIa). The survey has been carried out sinee 1983 on young pelagic
species (herring and mackereI). but was broadened in 1990 to include the important
demersal species (eod. haddock. whiting. and plaiee). A standard otter trawl with eod end
liner is operated from a commercial fishing vessel at 28 pre-detennined stations. The results
will be presented to ICES when a suitable time series has been generated.
SAMPLING DATA FOR:
1990
COD
IRELAND
Nr of fish
Scason
Ne sampIes
Agcd
Wcighcd
Meas.only
Total ne
VIa-N
1/4
34
230
316
1588
1904
VIa·S
1/4
80
137
251
3095
2346
VIIa·N
1/4
57
319
564
1227
1 791
VIIa·S
1/4
20
187
340
994
1334
VIIb
1/4
90
140
241
1854
2095
VIh!
1/4
3
-
78
78
Arca
•
SAM.PLING DATA FOR'
1990
HADDOCK
IRELAND
Nr of fish
Arca
Scason
VIa·N
1/4
VIa·S
1/4
VIb
1/4
VIIb
1/4
I Ne sampIes
I 19
I 22
I 7
I
48
Agcd
Weighcd
Mcas.only
Total ne
85
238
1400
1638
-
120
1906
2026
-
650
650
190
1491
1678
- 34SAMPLING DATA FüR:
1990
WlIITING
IRELAND
Nr of t1sh
Agcd
Weighcd
Meas.ooly
Total nr
354
1415
1488
25
-
215
4575
4790
1/4
60
24
335
8001
8436
VIIa·S
1/4
26
-
253
5128
5381
VIIb
1/4
35
-
156
5882
6038
Arca
Scasoo
Nrsamplcs
VIa·N
1/4
9
Vla·S
1/4
VIIa·N
SAMPLINGDATAFüR:
1990
HAKE
IRELAND
Nr of fish
Agcd
Wcighcd
Meas.ooly
Total nr
4
-
202
202
1/4
20
-
-
1869
1869
VIIa·N
1/4
15
14
228
242
VIIa·S
1/4
1
-
9
9
VIIb
1/4 ,
48
95
1351
1446
VIIc
1/4
1
-
52
52
VIIe
1/4
25
349
1009
1358
VIIg
1/4
48
424
3993
4417
VHi
1/4
1
-
56
54
HO
Scason
Nrsamples
VIa·N
1/4
Vla-S
Arca
SAMPLING DATA FüR'
Arca
VIIa·N
Scasoo
1/4
I Nrsamples
I
1990
SOLE
4
SAMPLING DATA FüR:
IRELAND
Nr of fish
Agcd
Weighcd
Mcas.ooly
Total nr
-
231
1235
1466
1990
PLAICE
IRELAND
Nr of fish
Arca
Scasoo
VIIa·N
1/4
VIIa-S
1/4
I
I
I
Nrsamples
15
17
•
Aged
Weighcd
Meas.ooly
Total nr
-
275
1756
2031
317
2048
2365
•
- 35-
1990
MEGRIM
SAMPLING DATA FÜR:
IRELAND
Nr of fish
Area
Aged
Weighcd
Meas.only
Total nr
4
-
-
607
607
1/4
34
-
-
4162
4162
VIb
1/4
1
-
116
II6
VIIb
1/4
28
4330
1/4
18
-
4330
VIIe
-
4532
4532
VIIi
1/4
157
432
792
15931
16723
Season
Nrsamples
VIa-N
1/4
VIa-S
FOUR SPOT 1\1EGRIM
1990
Nr of fish
SAMPLING DATA FÜR·
•
IRELAND
Area
Season
Nrsamples
I
Agcd
Weighcd
Meas.only
Total nr
VIIi
1/4
10
I
88
99
32
131
1. oohius
SAMPLING DATA FüR·
1990
bude~assa
IRELAND
Nr of fish
Season
Nrsamples
Vla-N
1/4
8
VIa-S
1/4
35
Vlb
1/4
3
VIIb
1/4
43
VIIg
1/4
3
VIIi
1/4
44
Arca
SAMPLING DATA FÜR·
Agcd
Weighcd
Meas.only
Total nr
-
-
94
94
-
-
548
548
-
15
15
15
460
475
2
47
49
155
2130
2285
1990
Lonhius niscatorius
IRELAND
Nr of fish
•
Area
Scason
VIa-N
1/4
VIa-S
1/4
VIb
1/4
VIIb
1/4
VIh!
1/4
I Nr sampIes
I 17
I 128
I 5
I 78
I
38
Agcd
Weighcd
Meas.only
Total nr
-
-
273
273
-
3513
3513
-
126
126
-
1411
1411
1494
1532
38
- 36-
THE NETHERLANDS
(F. van Beek)
In 1990 the market sampling of landings of the Duteh fleet from the North Sea in The
Netherlands was eontinued for the following species: brill (Scoohtha!mlls rhomblls), eod
(Gadlls morhua), plaice (Pleuronectes 12latessa), sole (Solea solea), turbot (ScOl2htha!mlts
maximlls) and whiting (Merlangills merlanglls). A new species, the greater silversmelt
(Argentina saus), was added to this list. For all species sampIes were stratified by harbour.
All sampIes were also stratified by market eategory. The tables below indicate the level of
sampling.
In February the 22 year old research vessel "TRIDENS" was replaeed by a new vessel with
the same name. The new "TRIDENS" is 73.54 m long and has a width of 13.86 m. It
offers aeeommodation to 12 scientists and a crew of 21 heads. It can handle eommercial
fishing gears as bottom trawls, large pelagic trawls and twin beam trawls. Beside it is
equipped to obtain hydrografieal data and to carry out plankton surveys, echo surveys and
surveys with a Remote Operated Vehic1e.
In January, June and August surveys were carried out with R.V. "Tridens" (5 weeks) and
RV. "Isis" (2 weeks) in the southern and central North Sea with the standard GOV trawl
and the IYGPT in the framework of the ICES multispecies program. The trips in June and
August on the "Tridens" were combined with an O-group roundfish survey.
In February the old and new Tridens carried out a trip (2 weeks) for eomparative fishing
with various gears.
In February R.V. "Isis" (2 weeks) participated in the International Young Fish Survey
(lYFS). These surveys, earried out sinee 1965, estimate the relative abundanee of 1 and 2
year old herring and roundfish.
On board of R V. "Stern" 2559 flounders (Platichthvs flesllS) were tagged in Dutch coastal
waters with the Peterson tag in the period March-May (3 weeks).
A combined egg survey in the period April-July on sole and horse mackerei was carried out
by R.V. "Isis" (7 weeks) and RV. "Tridens" (3 weeks) in the southern North Sea. The
aim of these surveys is to estimate the egg produetion and stock size of these species in this
area.
In April a SNS survey (Sole Net Survey) was carried out by RV. "Isis" (4 weeks). In
September-Oetober this survey was carried out by R.V. "Tridens" (3 weeks). These
surveys provide recruitment indices for 1- and 2-year old plaice and sole.
In June 2213 plaiee were tagged along the Danish coast by RV. "Isis" (2 weeks). In
August another 157 plaice were tagged in the Central North Sea by RV. "Tridens" during
multispecies trips.
In August-September a Beam Trawl Survey (BTS) was carried out by R.V. "Isis" (5
weeks) in the southern North Sea in collaboration with Belgium in order to investigate the
abundance and distribution of adult plaice and sole in this area.
In September-Oetober R.V. "Isis" (4 weeks), R.V. "Stern" (3 weeks) and R.V.
"Schollevaar" (2 weeks) participated in the Demersal Young Fish Surveys (DYFS). These
surveys estimate the relative abundanee of brown shrimp (Crangon crangon) andjuvenile
plaice and sole in the eontinental nursery areas. The surveys are earried out sinee 1969 in
eollaboration with Belgium and the Federal Republic ofGermany.
In Oetober-November R.V. "Tridens" (3 weeks) and R.V. "Isis" (4 weeks) earried out a
survey in the southern North Sea with the GOV trawl direeted to roundfish. This survey is
held since 1980 (Dutch Groundfish Survey).
•
•
- 37SAMPLINGDATAFOR:
1990
TIm NETHERLANDS
Research vessels
COD
Market
Arca*
Measurcd
Agcd
Aged
2
3
4
98
104
125
100
55
4
4
91
-
NRFA 5
1
2
3
50
447
283
50
40
50
-
1
2
3
4
1695
943
926
1 172
480
207
155
283
100
268
3
-
-
205
23
5934
1420
770
Season
NRFA 2
NRFA
NRFA 6
NRFA 7
4
•
1/4
Total
SAMPLING DATA FOR:
Total
-
THE NETHERLANDS
Research vessels
Measurcd
Aged
Agcd
3
-
-
140
1/4
-
-
140
Season
NRFA 7
174
1990
HADDOCK
Market
Arca*
-
* North Sea Roundfish Sampling Arcas
SAMPLING DATAFOR:
1990
TIm NETHERLANDS
Research vessels
\VUlTING
Market
Arca*
•
Season
Measurcd
Agcd
Aged
-
NRFA 1
1
76
50
NRFA 2
2
269
51
NRFA
4
4
97
NRFA 5
1
2
3
56
331
573
-
1
2
3
4
1402
1 111
1250
1914
250
200
250
300
75
1 111
3
4
-
-
-
88
114
7079
1201
1709
NRFA 6
NRFA 7
Total
1/4
100
321
-
- 38SAMPLING DATAFOR:
1990
SAITHE
Market
Area*
NRFA 7
Total
Season
THE NETHERLANDS .
Research vessels
Measured
AgOO
Agcd
-
-
26
-
26
3
1/4
* North Sea Roundflsh Sampling Areas
SAMPLING DATA FOR:
Area*
Season
IVa
2
VIa
2
VIIc
2
Vb
2
Total
1/4
SILVER Sl\IELT
I
Measured
Agcd
Agcd
146
75
-
885
606
307
75
47
25
1385
781
-
I
I
I
I
I
1990
PLAICE
Market
IV
Season
Total
Agcd
1318
1019
1030
961
765
546
1607
-
238
4
.
-
1/4
-
4328
3295
1
2
3
4
-
141
1990
TIIE NETIIERLANDS
Research vessels
SOLE
Market
Measured
Agcd
-
Waddensea 4
-
893
1287
817
4
-
-
78
1/4
-
3497
1914
IV
Zeeland
estuary
Total
Season
1
2
3
4
•
Research vessels
Agcd
SAMPLING DATA FOR:
Area
THE NETHERLANDS
Measured
Waddensea 4
Zeeland
estuary
nIE NETHERLANDS
Research vessels
I
SAMPLING DATAFOR:
Area
1990
Market
500
Agcd
522 .
376
932
6
•
- 39SAMPLING DATA FOR:
1990
TURBOT
Research vessels
Market
Area
IV
Season
1
2
3
4
Aged
Agcd
848.
1269
789
805
169
141
156
140
45
194
221
-
-
2
3711
606
463
Measmed
Waddensea 4
Zeeland
estuary
Total
4
1/4
SAMPLING DATA FOR:
1
Measmed
Aged
Agcd
1
2
3
4
668
677
331
620
111
101
123
108
25
85
82
Waddensea 4
-
-
3
2296
443
200
Area
IV
Season
Zeeland
estuary
4
Total
1/4
Market
Area
Season
Measmed
Agcd
515
373
1303
2495
-
Waddensea 4
4
-
1/4
-
-
Zeeland
estuary
Total
-
THE NETHERLANDS
Agcd
4
2
3
5
Research vessels
-
IV
-
1990
SAMPLING DATA FOR: DAß
•
-
1990
THE NETHERLANDS
Research vessels
BRILL
Market
•
THE NETIIERLANDS
-
254
50
- 40SAMPLING DATA FOR'
1990
THE NETHERLANDS
Research vessels
FLOUNDER
Market
Area
IV
Season
1
2
3
4
Zeeland
estuary
4
Measured
Aged
Aged
-
376
130
-
-
114
-
131
202
-
26
2
Lake
IJsselmeer
-
144
-
Total
-
764
359
1/4
•
•
----------~
- 41 -
NORWAY
(T.Jakobsen & O.M.Smedstad)
Sub-areas land 11.
Routine research surveys were carried out as in previous years, accounting for most of the
activity at seal The experim
t to use commercial trawlers for a bottom trawl survey in the Barents Sea/Svalbard
area was continued, but the number of trawlers was reduced from fifteen to five and the
duration was extendcd from one to two weeks. Stomach sampling for multispecies research
was carried out on routine surveys throughout most of the year. Investigations on cod and
haddock spawning (eggs, larvae) were combined with other surveys.
•
The abundance of eod, haddock and redfish in the Barents Sea was investigated during a
eombined acoustic and stratified bottom trawl survey in January-February. The distribution
and abundanee of spawning eod was investigated by acoustic surveys in the Lofoten area in
February-March. Combined with shrimp investigations, the distribution of young eod and
haddock was studied in the central Barents Sea in April-May and in the Svalbard area in
July-August. The distribution and abundance of eod, haddoek, redfish, and Greenland
halibut was investigated in the Svalbard area in September-Oetober. Part of this survey was
inc1uded in a multispecies acoustic survey carried out together with U.S.S.R. vessels
during the same period, when the distribution of cod, haddock, redfish and pelagic species
was investigated in the Barents Seal Stomach sampIes from eod and haddock were
eolleeted on all the routine surveys for eodlhaddock in the Barents Sea and at Svalbard, and
in addition on shrimp and pelagic fish surveys.
In November, a bottom trawl survey with five eommercial trawlers was earried out during
two weeks in the Barents Sea under the supervision of the Institute of Marine Research.
The intention is to repeat the survey for at least three more years. In addition to thc
abundanee estimation, emphasis was put on eomparisons between eommercial trawls and
the standard sampling trawl used by research vessels.
The post-Iarvae were studied in July. In August-September the International O-group
survey, aimed primarily at eod, was earried out in the Barents Sea and adjaeent waters in
eooperation with U.S.S.R. vessels.
•
An O-group (post-Iarvae) survey for saithe was earried out north of 62°N up to the Lofoten
Islands in May, and an aeoustic survey for saithe and redfish was earried out on the eoastal
banks from North Cape to 62°N in Oetober.
The sampling programme for eommercial eatehes of eod, haddoek, saithe, redfish and
Greenland halibut was eontinued.
Sub-area IV
The distribution and abundanee of I-and II-group Gadoids were studied in JanuaryFebruary as part of the International Young Fish Survey. During the annual aeoustic
survey for saithe in the North Sea in February, weather eonditions prevented the
programme from being carried out. In May the distribution of saithe post-Iarvae in the
North Sea was studied. The sampling of eommercial eatehes of saithe, sandeel and Norway
pout was eontinued.
- 42-
SAMPLING DATA FOR:
1990
COD
Market
Area
I
Ha
Hb
IVa
IVb
Samo
Measured
Fish
1
6
262
920
Agerl
Fish
514
5
16 1536
88
16
8301
1002
112 10 102
13 1085
-
-
Season
1
2
3
4
1
2
3
4
1
2
3
4
1
2
1
-
-
SAMPLING DATA FOR:
Samo
-
-
-
-
-
-
I
Ha
Hb
IVa
IVb
Season
1
2
3
4
1
2
3
4
1
2
3
4
1
2
1
Measured
Fish
Samo
5
-
1478
-
27
12
997
638
-
-
431
149
82
221
216
67
68
200
9
30
311
122
42
15
11
23051
8324
2709
16093
15399
3167
1364
15908
174
401
11 707
14256
491
98
89
71
34
25
29
55
28
10
20
4
6
72
5
21
1939
1960
888
1 146
2141
1093
351
914
150
136
2027
224
340
8
39
-
-
1990
HADDOCK
Market
Area
NORWAY
Research vessels
Measured
Agerl
Fish
Samo
Fish
Samo
Samo
Agerl
Fish
9
961
-
-
21 1886
561
6
-
-
-
NORWAY
Research vessels
Measured
Aged
Fish
Samo
Samo
Fish
283
172
46
155
225
154
88
117
5
14
168
53
48
30
12
28262
11205
1045
11 001
8693
2335
1537
7696
382
137
3800
1064
2909
943
353
48
3
2
14
41
14
2
19
1
987
80
80
478
1 163
308
38
844
91
14
3
13
275
59
491
4
95
-
-
•
-
•
-------------
- 43-
.
1990
SAITHE
SAMPLING DATA FOR'
M3fket
Area
Season
Measurcd
Fish
Samo
1
90
1
8
9
528
957
10
Samo
I
Ha
IIb
IVa
1
2
4
1
2
3
4
3
4
1
2
-
-
-
--
-
-
67
-
875
6 1286
-
-
Agcd
Fish
-
-
-
-
NORWAY
Research vessels
Measurcd
Agcd
Fish
Samo
Fish
Samo
38
4
8
101
92
14
98
2
5
24
36
351
4
359
6408
2349
138
3058
2
6
195
560
-
-
1
80
4
1
151
37
18
911
14
138
-
-
-
-
-
GREENLAND HALIßUT
1990
NORWAY
M3fket
Research vessels
Agcd
11easurcd
Measurcd
Agcd
Samp
Samp
Samp
Fish
Samo Fish
Fish
Fish
SAMPLING DATA FOR:
Area
•
I
Ha
IIb
Season
1
2
3
4
1
2
3
4
1
2
3
4
-
-
-
274
351
1
3
-
-
SAMPLING DATA FOR:
-
1
-
-
--
-
-
112
-
-
Season
Samo
•
Measurcd
Fish
Samo
7
Ha
-IIb
IVa
SAMPLING DATA FOR'. '\VHITING
I
1
2
4
1
2
3
4
3
1
..
-
-
-
Agcd
Fish
-
Season
Samo
I
IIa
IVa
IVb
1
1
2
3
4
1
2
1
-
-
Measurcd
Fish
Samo
-
-
-
-
-
-
-
119
1382
4969
2310
3
8
53
181
1
2
1
2
33
47
36
28
4
30
118
714
-
-
-
-
-
-
NORWAY
Research vessels
Measurcd
Agcd
Samo
Fish
Fish
Samo
6
17
39
16
97
25
36
256
1
I
9
47
15
44
10
44
-
-
-
-
-
-
-
1990
M3fket
Area
782
1581
62
873
131
127
252
275
1990
TUSK
M3fket
Area
85
67
22
80
17
12
21
28
5
30
180
86
-
Agcd
Fish
-
-
NORWAY
Research vessels
Measurcd
Agcd
Samp
Samo
Fish
Fish
1
4
5
24
44
.49
2
10
4
8
22
195
396
3346
3
44
-
-
-
269
10
-
..
-
- 44SAMPLING DATAFOR'
Arca
I
Scason
1
2
IIa
IIb
IVa
IVb
Vb
3
4
1
2
3
4
3
1
2
3
1
2
NORWAY POUT
Markct
Agro
Mcasurcd
Fish
Samo Fish
Samo
-
-
-
5
42
4
550
4182
438
.
-
-
-
2
3
1
-
-
-
239
346
103
-
SAMPLING DATA FOR:
Arca
I
Ha
Hb
IVa
Vb
Scason
1·
2
3
4
1
2
3
4
3
4
1
2
1
ßLUE WIIITING
Market
Agro
Mcasurcd
Fish
Sumo
Samo Fish
-
-
-
-
-
-
1
102
- . ..
-
1
-
I
Ha
IIb
IVa
IVB
Scason
1
2
3
4
1
2
3
4
1
2
3
4
1
2
1
-
-
19
8
5
6
43
42
15
58
16
50
19
368
283
12
31
1832
1628
269
3570
96
4204
436
9
1
423
75
-
Sumo
50
-
13
64
1
2
3
Aged
Samo
-
-
--
-
1990
59
38
52
58
LONG ROUGH DAß
Markct
Mcasurcd
Agro
Samo
Fish
Samo Fish
-
Mcasurcd
Fish
-
NORWAY
Research vessels
Samo
11
8
10
SAMPLING DATAFOR:
Arca
1990···
-
-.
-
6
161
2
-
66
-
NORWAY
Research vessels
Mcasurcd
Fish
Aged
Sumo
-
351
4
363
135
2087
1574
2023
1862
1203
1
151
127
14
12
2
-
-
-
Fish
-
-
1
Fish
-
1011
•
542
100
100
-
1990
NORWAY
Research vessels
Mcasurcd
Aged
Samo
Fish
Samo
Fish
157
82
64
44
94
27
49
47
6
28
271
11
47
2
14
6785
3363
3736
2965
3316
927
1 831
1069
200
1 114
12386
487
1533
11
317
-.
-
-
-
•
-
- 45SAMPLING DATA FOR:
1990
LING
NORWAY
Research vessels
Market
Arca
Season
Ha
[Va
[Vb
Aged
Measured
Samo
-
1
2
3
4
1
1
-
Fish
-
-
Samo
-
-
Fish
-
-
SILVER Sl\1ELT
Market
Agcd
Mcasured
Fish
Samo
Samo Fish
SAMPLING DATA FOR:
Arca
[
Ha
•
I1b
[Va
Vb
Scason
1
3
4
1
2
3
4
3
1
2
2
-
4
5
1
-
-
-
-
-
-
295
369
100
4
5
1
295
369
100
-
-
-
-
-
SANDEEL
Market
Mcasurcd
Fish
Samo
Samo
-
-
-
Area
[
[Va
IVb
Scason
3
4
1
2
1
2
3
4
-
-
2
2
-
40
10
1
SAMPLING DATA FOR:
-
-
241
239
-
4233
1272
124
-
-
-
10
1
1990
Fish
-
-
447
-
Mcasurcd
Scason
Samp
I
Ha
Hb
1
2
3
4
1
2
3
4
1
2
3
4
-
3
1
-
-
Fish
6
-
373
238
-
Samp
-
1
-
-
Agcd
Fish
-
-
4
-
-
-
Aged
Fish
10
1
1
457
30
50
-
-
1
1
1
-
-
1
-
-
-
-
71
6
Aged
5
-
Samo
-
--
. Fish
-
-
-
NORWAY
Research vessels
Aged
Mcasurcd
Samp
43
72
23
25
102
22
56
62
7
27
280
47
-
NORWAY
Research vessels
Fish
82
1
4
-
Samo
Mcasurcd
Samo
Market
Arca
Fish
-
NORWAY
Research vessels
Fish
5
1
1
307
915
70
1209
4
56
82
6
1990
REDFISH
Samo
Mcasurcd
Samo
4
1
1
36
27
17
41
4
2
6
1
Agcd
28 3011
643
6
4
Fish
14
11
1
39
11
1
1990
SAMPLING DATA FOR'
Aged
Measured
Samo
11
6
1
26
Fish
2726
3894
1522
1087
7194
1252
4033
2061
696
1494
15560
781
Samp
1
1
2
1
10
Fish
11
20
85
40
366
4
9
1
155
591
13
6
110
-
-
-
-
- 46-
POLAND
(J.Janusz and M.Liwoch)
No biological sampies were collected in the northeast Atlantic area by Poland.
•
- 47-
PORTUGAL
(F.Cardador)
During 1990 the National Institute of Fisheries Research (INIP, Lisbon) has continued its
National Sampling Programme at the main fishing ports. The main objective of this
sampling programme is to provide length frequency distributions of the landings for the
most important commercial species.
The Azores University has carried out a sampling programme at different Azorean islands,
in order to provide catch per unit effort data, effort data and length distributions of the
landings. This programme is mainly directed to Pagellus bogoraveo, Phycis phycis, 1k!:ll
decadactylus, Beryx splendens, Helicolenus dactyloptems, Pontinus kuhlii and Dalatias
licha.
•
INIP has carried out two groundfish surveys on board of the RN "NORUEGA". These
surveys covered the entire Portuguese coast in depths ranging from 20 to 750 m. The main
goal of these surveys was to provide abundance indices and to study the distribution pattern
of the most important species. The second aim comprised the estimation of the abundance
and distribution of eggs and larvae of the main species associated with basic environmental
parameters. The surveys took place in summer (July) and in autumn (October/November).
The methodology adopted is a fixed station scheme. Each survey had a duration of 30
fishing days, using aboltom trawl net (Norwegian Campell Trawl) with 20 mm eod-end
mesh size. Trawl stations were fished during day light, with a tow duration of 60 minutes
and a mean trawl speed of 3.5 knots. The distribution and abundance of eggs and larvae
were evaluated based on a sampling scheme with fixed stations, which were fished at night
using a Bongo net and CTD equipment.
Surveys on board of RN "MESTRE COSTEIRO" were also carried out in lune and
September for gillnet selectivity experiments and in August to estimate abundance indices
for cephalopods.
The following tables present the sampling data collected by INIP for hake (Merlllccius
werlucdus), black scabbard fish (Apbanoulls carbo), some species of seabreams (RoQ[?s
, /2QQJJ.s., Pagellus acarne and Spondv!iosowa cantharus) and monkfish (Louhius blldegassa
and L. piscatorills).
SAMPLING DATA FOR'
1990
HAKE
Nr of sampies
Res. vessels Market
PORTUGAL
Nr of fish
Measurcd
Aru1
Season
IXa
1
2
3
4
36
24
150
132
191
210
158
224
19908
23925
27037
33216
Total
342
783
104 086
Agcd
- 48SAMPLING DATA FOR'
ßLACK SCAßßARD FISII
1990
Nr of sampies
Arca
Scason
IXa
1
2
3
4
Res. vessels
Market
Measured
-
34
37
37
22
2930
3446
4075
2267
130
12718
Total
Nr of sampies
Scason
IXa
1
2
3
4
28
Total
Res. vessels
Market
Measured
-
38
30
37
22
35
1935
2119
1 781
3967
66
124
9802
IX
Res. vessels
Market
Measured
1
2
3
4
-
14
31
41
42
27
4S
3980
4245
2652
4503
Total
4S
155
IS 380
SAMPLING DATA FOR'
STJondvliosoma
cantharus
Nr of sampies
Arca
IX
Scason
Macket
Mcasurcd
1
2
3
4
-
16
19
16
29
22
27
413
803
621
730
Total
35
94
2568
Arca
Scason
DCa
1
2
3
4
Total
Macket
Mcasurcd
-
7
19
64
80
56
83
606
1 149
394
861
26
283
3010
* LnphillS lmdegassa & LoDlzillS piscatQrius
PORTUGAL
•
PORTUGAL
Nr offish
Res. vessels
•
Aged
1990
MONKFISII*
Nr 01' sampies
PORTUGAL
Agcd
1990
Nr offish
Res. vessels
SAMPLING DATA FOR:
Agcd
1990
Nr offish
Nr of sampies
Scason
PORTUGAL
Nr of fish
SAMPLING DATA FOR'. Pae.ellus acarne
Arca
Aged
1990
SMfPLING DATA FOR' B OOTJS bOOTJS
Arca
PORTUGAL
Nr offish
Agcd
- 49-
SPAIN
(F.J.Pereiro)
A groundfish survey has been eondueted in 1990 along the eontinental shelf of Divisions
VIlle and IXa North (420 -43 0 N) to estimate reeruitment indices of hake and abundance
indices of the main demersal species (e.g. monk. megrim, hake). The time period was 10
September - 16 Getober.
During the first months of the year short bottom trawl surveys were conducted in the c10sed
areas established in Spanish waters to protectjuvenile hake. The main aim ofthese surveys
was to follow the eoneentrations of reeruits on the nursery grounds. The number of hauls
per quarter sampled and the number of fish measured are given in the table below.
SPEClES
Prior Cape - Villano Cape
•
43°34'N
8°19.5'W
43°09.7'N
9°12.8'N
Corrubedo Cape - Silleiro Cape
42°6.3'N
42°34.7'N
8°54.l'W
9°5.7'lV
Season
Sampies
Measured
1
2
3
10
22
11
4185
5325
1550
1
2
3
24
24
12
2419
5008
3265
Numbers of sampIes and numbers of fish measured and aged on board ofresearch vessels
and in the market sampling programme are given in the next tables.
SAMPLING DATAFOR:
Arca
•
Season
HAKE
1990
Nr o1'fish
Nr 01' sampies
Res. vessels Market
Mcasured
VI
1
2
4
4
1
5
289
80
322
VII
1
2
3
4
33
33
31
27
7964
8151
6449
6139
VIIIa.b
1
2
3
4
54
56
45
34
5926
6397
5662
3772
VIIIc
1
2
3
4
81
119
79
68
7220
9922
12483
8754
30
33
29
30
3083
3332
4283
2853
792
103081
IXa
Total
1
2
3
4
36
61
18
115
Agcd
SPAIN
- 50SAMPLING DATA FOR'
L . whi(fiag.onis
Nr of sampies
Area
Season
Res. vessels
1990
Nr offish
Market
Measured
VI
2
3
4
2
2
4
161
156
349
VII
1
2
3
4
24
28
25
21
4706
5464
3821
4070
VIIIa,b
1
2
3
4
24
12
15
17
1734
868
757
1 166
VIIIc
1
2
3
4
28
36
32
33
1776
2341
1588
3719
16
16
14
15
69
8
137
3
364
32893
IXa
33
56
1
2
3
4
15
104
Total
SAMPLING DATA FOR'
Levidorhombus boscH
Nr of sampies
Area
Season
Res. vessels
Measured
VI
3
4
2
3
22
58
VII
1
2
3
4
21
24
23
20
683
1087
1
2
3
4
18
9
13
248
71
50
148
1
2
3
4
28
36
32
33
1668
1866
3852
3720
18
16
16
14
15
1066
1435
2489
1496
112
334
22256
VIIIa,b
VIIIc
IXa
Total
1
2
3
4
11
37
57
Agcd
•
1990
Nr 01' fish
Market
SPAIN
SPAIN
Agcd
1371
924
•
-----
-
-
- - - - - - - - - -
- 51 SAMPLING DATA FOR'
LOllhius /liscatorius
1990
Nr of sampies
Area
Season
Res. vessels
Market
Measured
VI
1
2
3
4
1
2
2
3
131
144
91
162
VII
1
2
3
4
21
25
23
18
1626
1797
1581
1214
VlIIa,b
1
2
3
4
32
21
24
26
1290
726
824
916
VlIIc
1
2
3
4
33
51
37
40
602
1323
1 159
1204
6
7
7
3
141
91
59
68
382
15149
IXa
12
45
1
2
3
4
5
62
Total
LO/lhiu... budeg.assa
Nr of sampies
I
SAMPLING DATA FOR'
•
1
2
3
4
21
25
23
18
1436
1935
1928
1466
VIIIa,b
1
2
3
4
31
19
21
27
1698
786
782
1026
VIIIc
1
2
3
4
31
34
34
39
345
835
541
830
6
6
7
6
482
225
249
213
358
14777
VII
IXa
Total
1
2
3
4
Res. vessels
17
39
7
63
SPAIN
Nr of fish
Measured
Season
Agcd
1990
Market
Area
SPAIN
Nr of fish
Aged
- 52SAMPLING DATAFOR· Pa~ellus bo~araveo·
Nr of sampies
Arca
Season
VII
1
3
1
1
VlIIa,b
1
2
4
4
5
1
VIIlc
1
2
3
4
34
27
Total
Res. vesseIs
1990
Nr offish
Measured
Market
I
Aged
6
52
125
153
18
3
6
1675
950
227
108
3
88
3314
9
SPAIN
•
- 53-
SWEDEN
(P-O.Larsson)
Sweden took part in the International Young Fish Survey in the North Sea and Division
lIla.
An evaluation of the results from the Swedish part of the IYFS regarding cod was reported
to the ICES Statitutory Meeting. The results strongly indicate a separate stock in the
Kattegat having little exchange with the Baltic and the Skagerrak stocks. Cod in the
Skagerrak seem to be recruited from the North Sea, with the exception of the so-called
fjord stocks present in both Norwegian and Swedish fjords.
SAMPLING DATA FOR:
•
COD
1990
Nr offish
I Nr of sampies
I
I
Measured
Aged
I
2440
610
Area
Season
I
Res. vessels
lIlA
1
I
1
Market
SWEDEN
- 54-
UNITED KINGDOM (England and Wales)
(C.T.Maeer)
The market sampling programme was eontinued in 1990. Details of number of fish
measured and otolithed are available on request.
The following researeh vessel eruises took plaee in 1990:
- R.V. "CIROLANA" participated in the North Sea International Young Fish Survey
in February, and earried out groundfish surveys in the western Celtie Sea in Mareh
and in the North Sea in August-September. A new boltom trawl survey was
eondueted in the eastern and western Channel (VIId,e) during Deeember.
- R.V. "CORYSTES participated in the International Beam Trawl Survey for fIatfish,
eovering the Southern Bight and eastern Channel (VIId) during August and made a
survey of pre-reeruit gadoids in the north-western Irish Sea in September. Sole egg
production in the Bristol Channel was investigated during February, April, May and
June.
- Chartered vessels earried out bouom trawl surveys during June and Oetober along
the north Wales eoast and a year-long investigation into the spatial distribution of sole
and plaiee year-cIasses in the area was eoncIuded by the end of August. A ehartered
vessel was also used to survey sole in the western Channel (VIIe) in the period
September-Oetober.
- During September an inshore beam trawl and push net survey took plaee between
FIamborough Head in the North Sea and Swanage Bay in the Channel (VIId) to
eolleet data for juvenile flatfish year-cIass determination.
- The feeding eeology and size strueture of O-group gadoids was studied in different
areas of the North Sea during June, and predation and prey seleetion in eod and
whiting was investigated in the western North Sea in November.
- The incidenee of fish diseases was investigated in the North Sea during May and
August-September.
•
- 55-
UNITED KING DOM (Scotland)
(R.Cook)
Monitoring of the main demersal species by Scotland is undertaken through three main
sampling activities. These are market sampling of fish landed by the commercial fishery,
sampling fish caught but discarded at sea and annual trawl surveys by the Department's
research vessels. Most of the data collected are used by the ICES Roundfish Working
Group (RFWG) and Industrial Fish Working Group.
During 1990 sampling continued at the same level as in previous years. Port sampies are
stratified by month, gear type an4 sea area. The numbers of fish sampled in ICES sub-area
IV and Divisions VIa and VIb are given in the table below.
Soecies
Cod
Haddock
Whiting
Saithe
Lemon sole
Plaice
Angler
Megrim
Sandeel
Spurdol!
Vessels sampled
All areas (IV, VIa VIb)
measured
563
510
511
419
233
278
124
81
99
65
agcd
74603
155707
126610
31642
36933
38508
.7819
12086
15412
4345
17 206
19523
11742
13068
4344
5634
658
427
1794
-
In 1990, approximately 50 commercial vessels were sampled for discards in the North Sea.
No sampling was possible in Division VIa. Discard sampling, like port sampling is
stratified by gear type and sea area but because of resource limitations sampling is
undertaken on a quarterly basis. Aggregate numbers of fish sampled are given below:
North Sea (IV)
•
Soecies
Cod
lIaddock
Whiting
Saithe
measured
agcd
8175
38107
47159
690
1605
3220
3341
232
The following bouom trawl surveys were carried out for groundfish:
Vcssel
Arca
Period
Comment
Scotia
Scotia
Scotia
Scotia
Clupea
North Sea (IV)
West of Scotland (VIa)
North Sea (IV)
Rockall (VIb)
Clvde (VIa)
February
IYFS Commitment
Indices used by RFWG
SGFS. indices used by RFWG
Indices used by RFWG
New survev. results not vet available
March
August
September
November
In addition, a commercial vessel was chartered in August for a survey of recruiting
sandeeIs at Shetland.
- 56-
U.S.A
(F.Serchuk and B.Rothschild)
The U.S.A. had no fisheries and no research vessel activity on demersal fish in the leES
area in 1990. Activities in the Northwest Atlantic have been reported to NAFO.
•
- 57-
U.S.S.R
(A.A.Elizarov)
In 1990, as previously, trawl, trawl-acoustic and ichthyoplankton surveys were conducted
to assess abundance and biomass of the main commercial fish species, and the potential
recruitment of co<!, haddock, redfish and other fish species in the Barents Sea and adjacent
waters.
Investigations were continued to determine the influence of hydrological conditions and
food supply on fish distribution and behaviour. Population structure, dynamics of their
biological characteristics and migration patterns of major commercial fishes were studied.
The investigations of the food web between fish stocks were in progress.
The tables present the information collected during 1990
SAMPLING DATAFOR:
1990
COD
U.S.S.R.
Nrof fish
Season
Mcasurcd
Feeding investigations
Aged
I
1
2
3
4
5326
10576
23876
8340
975
1351
4192
1632
207
766
2183
502
IIb
1
2
3
4
4031
19851
4827
5631
647
931
1 147
1180
529
286
661
626
IIa
1
3
4
15416
36
588
1703
12
145
440
1/4
98498
13 915
6200
Arca
Total
SAMPLING DATA FOR:
HADDOCK
1990
-
U.S.S.R.
Nrof fish
•
Area
Season
Mcasurcd
Feeding investigations
Aged
182
325
1 199
56
[
1
2
3
4
3200
3096
18665
1601
452
325
1536
261
IIb
1
2
3
4
82
1402
3245
-
489
489
1
4
1030
125
220
25
127
32446
3308
2378
Ha
Total
1/4
-
-
-
-
-
- 58SAMPLING DATA FOR:
1990
REDFISH
U.S.S.R.
Nr of fish
Area
Season
Measured
Feeding investigations
Aged
1
2
3
4
835
1378
4936
920
33
-
20
-
IIb
1
2
3
4
10 379
4136
9154
4156
1260
325
100
50
400
300
100
15
Ha
1
3
4
11925
189
133
1591
1271
1/4
48141
3379
2106
I
Total
SAMPLING DATAFOR'
-
20
-
GREENLAND HALIßUT
1990
-
U.S.S.R .
Nrof fish
Area
I
IIb
Ha
Total
Season
Measured
Feeding investigations
-
Aged
-
1
2
3
4
29
8
817
766
83
1
83
1
1
2
3
4
3264
383
3784
14306
610
75
806
1688
610
431
486
1
3
4
478
43
1060
161
179
100
-
24938
3524
1 790
1/4
SAMPLING DATA FOR:
-
1990
SAITHE
-
U.S.S.R.
Nrof fish
Area
Season
Measured
Feeding investigations
-
Aged
I
1
2
3
4
159
29
13
1
Ha
3
4
1
5
-
-
208
-
-
Total
1/4
-
-
- - - - --
-----
'w
- 59,
SAMPLING DATA FOR :
Area
Season
Measured
Feeding investigations
U.S.S.R.
Aged
148
81
817
373
115
115
187
224
34
79
IIb
1
2
3
4
401
211
466
1471
162
121
59
269
137
121
10
269
IIa
1
3
4
140
6
6
9
2
5
2
1/4
4120
1 148
772
Total
SAMPLING DATA FOR :
Area
Season
LONG ROUGH DAß
Measured
1990
Nrof fish
Feeding investigations
U.S.S.R.
Aged
1
2
3
4
1707
162
3841
6198
517
50
138
677
242
1
2
3
4
1084
153
1625
7285
100
100
202
262
152
56
1
3
4
998
52
85
175
100
Total
1/4
23190
2121
1 137
SA~1PLING
DATAFOR:
I
IIb
IIa
e
1990
Nr of fish
1
2
3
4
I
e
WOLFFISHES
Area
Season
PLAICE
Measured
I
1
2
3
4
2125
2724
3567
1
IIa
4
78
Total
1/4
8495
1990
Nrof fish
Feeding investigations
123
364
U.S.S.R.
Aged
844
500
833
584
300
688
2177
1572