D/O
International Council for the
Exploration of the Sea
C.M. 1988/G:l
Report of Activities
OEMERSAL FISH COMMITTEE
by
Vaughn C. Anthony
1987
BELGIUM
(R. Oe Clerck)
Recording of densities and growth rates of the 1986 and 1987 year-classes of
sole, plaice, dab, flounder, cod and whiting was carried out.
Two cruises were also undertaken for the international demersal young fish
survey.
The groundfish survey continued in order to es ti mate the stock size of adult
flatfishes in the Southern North Sea by means of a beamtrawl fishery in
August. This was part of an international survey.
The market sampling was continued covering cod-North Sea, whlting-North Sea,
haddock-North Sea, plaice and sole-North-Sea-English Channel-Celtic Sea and
Irish Sea (see table).
- 2 -
Yl'"r : 1987
Sp"ci".
{8e1 t iua )
SHlllllo:ln
Ar .._
No ot •••plf'1III
Hllrkl't
Research
10
10
12
12
Sol ..
IV
9
VII t, B
1
1
4
VII "
f'
~5O
140
1
1
"0
70
210
210
10
210
4
10
10
12
12
VII t, c
VII ,.
,•
2
9
7
1
4
4
Cod
IV
"hitlng
IV
2'0
)50
140
1)0
140
HO
654
140
1 568
76'
')0
,
100
120
'08
40
120
120
'0
'64
.40
100
100
120
100
100
100
7
4
2
.85
206
70
160
185
150
70
11
5
4
7
6'8
194
')0
2'0
')0
115
100
"
55
)
l'
,
Raddock
IV
4,.
•
..
60.
150
140
566
4 ••
7'
2"
1
1
VII d.
'"
421
,
IV
210
210
210
210
1
2
Pldc.
1}9
820
6'5
105
, z96
~
Ag"d
210
210
281
210
945
922
,
,
VII d.
No or ."lIIpl ....
M~l'I.f1;ur..d
200
1)4
90
CANADA
(R. WeIls)
Canada had no fisheries and no research activity in the ICES area
in 1987. Activities in the Northwest At1antic in 1987 have been
reported to NAFO.
••
,
- 3 -
F1NLAND
(V. Sjoblom & E. Aro)
No work was carried out on demersal flsh other than that reported to the
Baltic Fish Committee.
FEDERAL REPUBLlC OF GERMANY
(G. Rauck)
The blologlcal sampllng programme of demersal specles on board research vessels,
commerclal trawlers and on flsh markets has been contlnued.
Thls sampllng scheme, Includlng length frequency measurements, otolith sampllngs,
single welghts of flsh, tagging of flsh, stornach sampllng, as weIl as studies on fish
denslty and distribution of demersal fish species were carrled out durlng ground
fish surveys.
The monthly bycatch analysis of the shrimp flshery as weil as the joint Investlgatlons In the Wadden Sea area of NIedersachsen and Schleswlg-Holstein (young flsh
and brown shrimp survey) have heen contlnued In spring and autumn together wlth
vessels from the Netherlands and ßelgium.
\
Investlgatlons on cod discards In the commerclal f1sherles and cod selectlvlty studies
uslng mesh stzes of 90 and 100 mm mesh openlngs were carrled out In the German
ßlght.
The cod sampllng scheme off Greenland has been contlnued almlng at a stock separation by means of different otolith strucutures.
A North Sea groundflsh survey wlth special emphasls on the gadold and pelaglc
specles coverlng the area IVa and b has been repeated.
Research vessel crulses related to the national sampllng scheme of the demersal
specles were as folIows:
R. V. "Walther Herwlg"
Months
leES area
Objectlves
January
Febr./March
IVb
Groundflsh survey (fIsh dlsease)
lVabe
IYFS
March
-Vlab
Groundflsh and pelaglc survey
June
June-April
AugustOctober
[Vb
Groundflsh survey (fIsh dlsease)
IVabc
Groundflsh survey
XIVb
Groundfish survey
December
IVb
Groundflsh survey (fIsh dlsease)
Re.earch V•• 8el Sampie.
Se880n ~o.
Sp. ci ••
,\rp.ft
No. Of Fleh
ot
ßampl ..
Cod
Market SRmpl . .
N". of Flsh
loI.a8ured
Aged
Radal
In"P.stillatlonn
No, of
Sarapl".
Me".ured
Aged
Ground ish surveys
Ha
I
2
791
11
409
1
358
191
I1b
11
781)
364671)
9321)
(Va
111
47°
181591)
6571)
I
51
IVb
111
1
IV
17
171
121
138
41
IV
32
Il
111
Vb
343
592
343
400
1097
5857
754 2)
I
.e-
2055
I
6982
1327
11924
45881)
329
975 2)
1
568
t) sam le taken on boa d comm rclal trawl
2) tagg d
Vb
shrimp bycatch lnvestlg tlon
20
63
11
!
111
13
31
IV
10
57
I
i
:
•
•
I
Research 'fcssel SelUple.
Market Samplee
No, Ot rieh
No, ot Fish
Spedee SeaeOD ~o, ot
Samplee
,\re"
Aged
Ueasured
Rad al
Inv"eUg-
No, ot
Sampies
Measured
Aged
otionn
Groun f1sh surveys
lVc
I
4
1608
Via
I
29
86
VIIb. c
I
6
33
VlIg-k
I
6
4
Vlle
I
1
5
XIVb
I
3
1162
605
II
4
1534
765
371)
1/11
1)
113
lII/IV
S3IT
398
98301)
6851)
pIes taken on b ard free er trawler
18062)
8600
1806,
2) oto th typlng for
~
I
ock disc Imlnatlon
,
:
I
U1
I
---
---
-
Research Ves.el Samplu
-
..
~Iarke
No. oC Floh
Specieo
t\re"
58a8oB ~o. oC
Sampies
-
-
t Samplea
No. Of Floh
lIeaoured
Aged
Raeial
I nvl!O tig-
No. of
Salllples
lJellsured
Aged
o tlonn
Groun flsh surveys
Haddock
Ha
I
I
Il
I
363
295
190
150
3
1312
588
I
30
54
45
103
H
12
11I
52
1
31
6
6
11
0 sampl
IIb
11I
IVa
I
11I
IVb
IV
Via
I
VHb. c
I
VlIg-k
I
XlVb
11I
:
I
621
13101
0
1201)
1365
169
631
12016
5320
4409
6291
35 0
2433
192
11
336
5
!
I
652
'"I
336
taken on a c( ~mercla
,
trawler
Research Vesoel Somple.
Spec1ee
Areft
"arket Sl\mplee
No. Of Fieh
No. of Floh
5e .. oo, ~o. of
:;amplea
Aged
Yealured
Racial
No. of
I nVll8 ti 11-
5amplea
lJeasured
Aged
ationn
Whltlng'
Groun f1sh surveys
IVa
51
45
141
120
59
6
161)
I
III
IVb
I
11
111
IVb
IV
IV
679
183
105
6918
6775
17133
11844
9945
626
5681)
573
I
Young sh and brown
66
71
11
IVb
III
S
....,
rlmp sur eys
I
1191
965
Grounc lsh surveys
24
6
9
2594
305
82
VIa
I
VIIb, c
I
VIIg-k
I
IVc
I
IVb
11
53
664
III
78
36
589
52
l) Sam les taken on b ard com erclal
2
tra~
er
361
Shrimp bycatch Investl atlon
IV
!
I
;
:
-
R..eareh Ves8e 1 Samplea
Specie8
~o. or
SealoD:
I\rea
lJarket Samplee
ND. or Flab
Sample8
No. or Fleh
Yeasured
Aged
Raelal
Inv"8Ug_
otlonn
No. or
Samples
Me"8ured
Aged
BiueLtng
VIa
1
I
Vlb/XII
I
1
1
4
5
247
1819
255
1162
1300
133
198
135
606
685
3
4
1296
19426
650
740
4
5
9
6
7
6
1
1801
5343
3851
2894
2921
5354
408
935
976
1929
1368
1643
1160
213
Vb
I
IV
XIV
1JI
1
141
141
Salthe
I
Jla
JI
I
())
I
IV
IV~
I
1
662
255
1
42
42
1
752
211
1
181
JI
1JI
IV
VIa
I
II
VII
I
!
I
!
:
,
Market Samplea
Re.eareh V".ael Samploa
No. 01 Fleh
No. ot Floh
Speciea
Ares
Seaeon ~o.
ot
Aged
lIea.ured
Sampie.
Rad a 1
1nv.,8tigntionn
No. 01
Samplea
Aged
MeRBured
Grou ~ f1sh surveys
Plalce
1
IVb
"111
IV
IVc
10606
6892
6232
491
85
122
134
70
6
1
I
2
4229
511
2
1346
342
Young Ish and brown ~rlmp su veys
IYb
101
129
"
111
IVb
136
158
65
III
IV
'"I
bycatch Invest ~atlon
Shrlm
"
I
7715
8348
12406
12291
3570
'.
:
I
;
I
Rueareh Ve8ael Saraples
Marke t SRmplea
No. or Flah
Spedea
Seaeon ~o.
ot
Aged
Yeaaured
Sampies
'\rea
No. or Flah
Raci al
InvP.8tig-
No. or
Sampies
l.IeRaured
Aged
ationn
Sole
,
Groun fish surveys
74
191)
II
IVb
IV
1684
719 11
898
4
1459
1402
Young ish and brown s rimp su eys
IVb
84
99
II
III
628
2587
Shrlm~
IVb
bycatch Investl atlon
94
122
55
II
III
IV
1567
1482
556
J
....
0
J
II Sam pIes taken on b ard com ~erciaI tra er
!
I
i
:
Research Vessel Samplea
Ma rke t Samp le 0
No, 01 Floh
Specioo
Sea.oD~
No, 01 Floh
No. 01
:;ampleo
,\reft
Dab
Aged
Ue8aured
Raclal
Inv"oUgaUoRn
No, 01
Sample8
Mea8ured
Aged
Groun f1sh surveys
/Vb
/4922
19331
4315
406
8531)
71
122
70
5
201)
I
11
JII
IV
IV
Young sh and brown s rlmp sur eys
IYb
97
114
11
III
2752
2900
I
....
....
Shrimp bycatch Investl at/on
/Vb
96
79
65
11
III
IV
11
~
I
I
1189
1634
8641
.
Sam les taken on b ~rd com erclal tra" er
1
:
:
Ruearch Vcssel Sam..!e.
Market Sampi ••
No. oe Floh
Specleo
,\re"
SeaooD No. oe
Samplea
Flounder
No. oe Vieh
lIeasured
Aged
Radal
Inv.. eUgntionn
No. oe
Samplu
MeRsured
Aged
Groun fish surveys
IVb
3
61)
I
IV
136
20°
Young ish and brown s rlrnp sur ey
IVb
84
12
11
III
458
13
Shrlrn~
11
III
IV
bycatch Investl atlon
119
94
49
1170
497
463
18
249
I
>-'
'"
I
Greenland
Hallbut
XIVb
11
5
IV
249
I) Sam les taken on b ard com rerclal tra~ er
!
I
;
,
423
--------------------------------------------
Research V.soel Saruple.
Marke t Sampleo
No. o( Floh
No. or Floh
Sea.OD No. or
Speeieo
Samples
Areft
lIeaoured
Aged
naeial
lnv•• tl g_
ßtlonn
No. or
Sampleo
Me"sured
Aged
S.mannus
XIV
II
3
III
98
26054
1126
55
10303
1048
I
1132
574
4
2
3
1
4
1
2840
1172
1434
378
2632
584
5
2
2
2370
985
1061
S.mentella
XIV
II
III
Vb
I
11
IV
Ha
I
372
722
181
S.marlnus
Ha
I
11
IV
Macrourus
berglax
fxIV
29
III
!
i
906
!
443
,
,
I
.....
w
380
359
I
- 14 -
R. V. "Solea"
Months
ICES area
Objeetlves
January
lVbe
Febr./Mareh
May
lVbe
Groundflsh survey
Groundflsh survey
June
August
IVb
November
IVbe
Groundflsh survey
Sole beamtrawl survey
Groundfish survey
Groundflsh survey
IVb
IVb
ICELAND
(J. Magnusson)
In general the research work and the biological sampling programme on demersal rlSh was carried out
a10ng the same Jines es in previous years and the research thus besed both on research vessel data and
market sampling.
Tbe grealest part of the research vessels dala was coUeded during the annual grooodflSh survey which
is carried oul simullaniously wilh live commercial Slern trawlers of same type covering some 600
stations.
Two research cruises were direded lowords deep sea species, in particular blue Iing grenadier and
silver smell.
The witch became a subjeet for aimed flShery and a sampling programme on thaI flShery was
implemenled.
Market sampling was carried oul from Ibe main office of Ibe Marine Research Institul in Reykjavlk
and from the live branches of MRI.
Fishery inspeclors colleeted also a coDSiderable amoool of dala on demersal flSh on board commercial
rlShing vessels and al the market.
Tbe number of sampled demersal flSh is shown in Ibe allached lables.
•
- 15 -
Sampling data 1987
eod
Area
•
Va
Season
Jan-Mar
No of sampies
Market
Researeh
Vessels
SampIes
143268
66
44492
6075
66819
1875
35728
12348
192
31%45
12978
225
48
Jul-Sep
368
Oct-Dec
173
13
Total
1812
Nooffish
Aged
3944
1876
1100
2002
1607
SOO
946
1003
1046
65
Apr.Jun
Measured
9040
Tagged
Haddock
Area
Va
Season
Jan-Mar
No of sampies
Research
Market
SampIes
Vessels
633
19
Apr-Jun
66
Jun-Sep
24
Oct.-Dec.
27
2162
898
598
36J
15
50
l22666
4908
7
750
No offish
Aged
98271
1628
7800
962
5172
1700
5169
1%4
9
Total
Measured
Tagged
100
386
401
Saithe
•
Area
Va
Season
Jan-Mar
Apr-Jun
Jul-Sep
Oc1-Dec
Total
No of sampIes
Researeh
Market
Vessels
SampIes
339
19
38
13
17
10
4
1
398
43
Measured
5S47
2323
4767
913
2578
825
Nooffish
Aged
1325
700
300
633
404
400
846
116
17915
100
3862
Tagged
- 16 -
Redfish
Area
Va
Season
Jan-Mac
No of sampIes
Research
Market
SampIes
Vessels
S.marious
566
7
Apr-Jun
59
JuI-Sep
2
4
5
Oct-Dec
Total
10
26
628
No offish
Measured
71519
1879
4062
1326
443
1561
104
2336
83230
Aged
578
600
165
147
1490
S.mentella
Area
Season
Va
Jan-Mar
No of sampIes
Research
Macket
SampIes
Vessels
3
84
2
Apr-Jun
54
JuI-Sep
Oct-Dec
4
3
664
4862
333
4831
587
836
651
10
12764
2
Total
142
No offish
Measured
Aged
170
170
S. vivlparus
Area
Va
Total
Season
Jan-Mac
Apr-Jun
No of sampIes
Research
Macke!
SampIes
Vessels
204
SS
259
No offish
Measured
8433
4429
12862
Aged
- 17 -
liog
Area
Season
No of sampIes
Market
Research
Sam pIes
Vessels
4
Va
Nooffish
Measured
Aged
260
Jan-Mar
Apr-Jun
116
372
291
16
65
65
1
5
32
729
356
5
943
813
210
482
2
484
Oct-Deo
132
Total
Blueling
Va
Jan-Mar
80
Apr-Jon
46
626
Oct-Dec
Total
626
210
126
8
3076
1318
Whiting
Area
Va
Season
Jan-Mar
Apr-Jon
No of sampIes
Research
Market
Vessels
SampIes
101
3
Nooffish
Measured
Aged
1895
390
105
104
2285
105
Jan-Mar
Apr-Jon
26
4
30
167
7
174
115
6
121
Jau-Mar
34
10
4453
486
514
140
44
4939
654
Total
Rough head
Va
Total
Roundnose
Va
Apr-Jun
Total
- 18 -
Brosme
Area
Season
No of sampies
Market
Research
SampIes
Vessels
Va
No offish
Aged
Measured
5
346
1674
101
786
1
146
146
Jan-Mar
319
Apr-Jun
43
Jul-Sep
407
Total
134
134
3
484
100
9
2885
1166
45
Oct-Dee
Silversmelt
Va
Jan-Mar
84
4237
633
Apr-Jun
54
3025
1687
Jul-Sep
26
215
215
164
74TI
2535
Total
Catllsh
Area
Season
Jan-Mar
No of sampies
Research
Market
SampIes
Vessels
512
2
NooffIsh
Measured
Aged
17473
435
1589
100
6
1236
500
2
351
100
10
19495
2289
217
1322
290
217
1322
290
Apr-Jun
Jul-Sep
Oct-Dee
5U
Total
Hallbut
Jan-Mar
Apr-Jun
Jul-Sep
Oct-Dee
Total
•
- 19 -
Area
Va +XIV
Va + XIV
Va +XIV
Va+XIV
Total
Season
No offish
Measured
No of sampies
Market
Research
Vessels
SampIes
Jan-Mar
Apr-Jun
JuI-Sep
Oct-Dec
14
4
13
1
6
90
1345
4229
1945
1096
8615
6
110
24
Aged
1187
96
104
1387
Wilcb
Area
Season
Jan-Mar
No of sampIes
Market
Research
SampIes
Vessels
203
Nooffisb
Measured
Aged
5
1753
1155
515
100
2
649
200
7
3557
815
Apr-Jun
JuI-Sep
Ocl-Dec
Total
203
Starry ray RlIJa radlata
Jan-Mar
523
8108
523
8108
Apr-Jun
JuI-5ep
Ocl-Dec
Total
•
- 20 -
"NETHERLANDS
(FA van Deek )
In 1987 the market sarnpling of landings of the Dutch fleet in The Netherlands was
continued for the following species: brill (Scophthalmus rhombus), cod (Gadus
morhua), haddock (Melanogrammus aeglejinus), plaice (Pleuronectes platessa), sole
(Solea solea), turbot (Scophthalmus maximus) and whiting (Merlangius merlangus).
For roundfish the market sarnpling was stratified on an area basis. For the other species
samles were stratified by harbour. All sarnples were also stratified by market catogery.
The tables below indicate the level of sarnpling.
In addition sarnples of flounder (Platichthys flesus) and dab (Umanda l/manda) were
obtained for otolith studies.
In the period January-March R.V. "Tridens" (4 weeks), R.V. "Isis" (5 weeks) and a
charter vessel (2 weeks) carried out egg-surveys on cod and plaice in the North Sea.
These surveys will be continued in 1988. The aim of these surveys is to estimate the
egg production and stock of these species in this area.
In February R.V. "Tridens" (4 weeks) and R.V. "Isis" (3 weeks) participated in the
International Young Fish Survey (IYFS). These surveys, carried out since 1965,
estimate the relative abundance of 1 and 2 year old herring and roundfish.
In May the distribution of Q-group cod was investigated in the southern North Sea with
R.V. "Tridens" (2 wecks). The larvae were probably too small by then for the gear
used (GOV trawl with small meshed cod-end) and only a few specimens were
collected.
In summer three coastal surveys directed on juvenile brown shrimps (Crangon crangon)
and Q-group sole were carried out with R.V. "Isis" (3 wecks) in order to investigate the
settlement of these species in the beach zone.
In August a survey was carried out on R.V. "Tridens" (3 weeks) and R.V. "Isis" (2
weeks) in the southern and central NOrth Sea with the standard GOV trawl in the
framework ofthe ICES multispecies program.
In August a bearn trawl survey was carried out by R.V. Isis (4 weeks) in the southern
North Sea in collaboration with Belgium in order to investigate the abundance and
distribution of adult plaice and sole in these areas. A similar survey on a reduced
station grid was carried out by R.V. "Tridens" in April in combination with the DYFS
survey.
In September-October R.V. "Tridens" (3 weeks), R.V. "Isis" (4 weeks), R.V. "Stern"
(4 weeks) and R.V. "Schollevaar" (2 weeks) participated in the Demersal Young Fish
Surveys (DYFS). These surveys estimate relative abundance of brown shrip and
juvenile plaice and sole in the continental nursery areas. The surveys are carried out
since 1969 in collaboration with Belgium and the Federal Republic of Germany. In
April a DYFS survey was carried out on a reduced station grid by R.V. "Tridens" (4
weeks) and R.V. "Schollevaar" (2 weeks).
On board of R.V. "Isis" 2042 young soles (range 15-24 cm) were tagged in the
German Bight near I1eligoland with the Peterson mini tag in Detober (2 weeks). In the
•
- 21 -
same period also 700 young plaice were tagged nonh of Terschelling. Also for plaice
the Peterson mini lag was used. Besides they were injected with tetra-cycline.
In October-November R.V. "Tridens" (3 weeks) and R.V. "Isis" (3 weeks) carried out
a survey in the southern Nonh Sea with the GOV trawl directed to roundfish. This
survey is held since 1980 (Dutch Groundfish Survey).
- 22 SAMPLINGDATAFOR: COD
1987
NETHERLANDS
NUMBERS OF FISH SAMP LED
~
PERIOD
.-,-,
MARKET
measured
Res. Vessel
~
.---EQld-
-------- -------- 1 - - - - - - ,------- 1
Northern
North Sea
1st
2nd
3rd
4th
quarter
quarter
quarter
quarter
162
122
40
4
Western
North Sea
1st quarter
2nd quarter
3th quarter
4th quarter
470
200
133
-
------ ------ 2
1st quarter
85
Central
2nd quarter
North Sea
3th quarter
170
4th quarter
1st quarter
3
32
North Western
2nd quarter
.
. North Sea
3th quarter
147
.
4th quarter
-------- -------- - - - - - ------ -
85
-
-------- -------- - - - - - -----5
South Western
North Sea
1s1 quarter
2nd quarter
3rd quarter
4th quarter
-
164
478
87
222
-
-
42
.
17
8
50
-
------- 6
Southern
North Sea
1st quarter
2nd quarter
3rd quarter
4th quarter
3650
1548
1305
160
195
150
346
50
-
-
281
34
8231
1031
2437
------- ------- ----- -----7
Eastern
NorthSea
1st
2nd
3th
4th
quarter
quarter
quarter
quarter
237
202
827
------ ------Total Annually
-------'---------- ---'-- ' - - - - - - - " - .
- 23 -
SAMPLING DATA FOR: HADDOCK
--------
--------
1987
PERIOD
~
- - - - - - - _.
1
Northern
Nonh Sea
1st quarter
2nd quarter
3rd quarter
4th quarter
2
Central
North Sea
1st quarter
2nd quarter
3th quarter
4th quarter
3
North Western
North Sea
1st
2nd
3th
4th
NETHERlANDS
----NUMBERSOFFISH-SAMPLEO--MARK
--------~--~measured
175
170
230
30
-
120
53
37
243
-
-----fquarter
quarter
quarter
quarter
-
205
200
- - - - - - - - ~----- - - - - - 4
Western
Nonh Sea
1st quarter
2nd quarter
3th quarter
4th quarter
5
1st quarter
2nd quarter
3rd quarter
4th quarter
South Western
North Sea
6
Southern
North Sea
1st quarter
2nd quarter
3rd quarter
4th quarter
129
62
157
50
50
-
175
50
----173
431
722
199
50
30
150
95
58
- - - - - -._---.j.----7
Eastern
North Sea
1st quarter
2nd quarter
3th quarter
4th quarter
-
212
-
---------- -------- - - - - Total Annually
--------
2308
------
410
-
1538
- 24 SAMPLING DATA FOR: WHITING
1
Northern
North Sea
1st quarter
2nd quarter
3rd quarter
4th quarter
2
Central
North Sea
1st quarter
2nd quarter
3th quarter
4th quarter
95
146
1st
2nd
3th
4th
149
quarter
quarter
quarter
quarter
104
------ -----
------1st quarter
2nd quarter
3th quarter
4th quarter
41
261
143
126
50
156
50
----- ------- -----
---5
South Western
North Sea
152
62
105
- - - - - ------ ------
--------
4
Western
North Sea
NETHERlANDS
PERIOD
N'EA
3
North Western
North Sea
1987
1st quarter
2nd quarter
3rd quarter
4th quarter
116
171
297
140
50
50
96
41
93
-------- -------- - - - - - ------- - - - 6
Southern
North Sea
1st quarter
2nd quarter
3rd quarter
4th quarter
3626
1954
1758
250
200
150
694
-------- - - - - - - 7
Eastern
North Sea
Total Annuallv
1st
2nd
3th
4th
130
231
825
-----
quarter
quarter
quarter
quarter
142
94
9494
800
2454
- 25 SAMPLING DATA FOR: PLAICE
-------
-------PERIOD
ftPEA
-------North Sea
e,
-------1st
2nd
3rd
4th
--NUMBERSOFFISH SAMPLEO---
------- -~
--- --measured
~
------2720
1360
1360
720
------
1242
1239
1402
------ -----
1st quarter
2nd quarter
3th quarter
4th quarter
226
146
-----Zeeland
estuarium
NETHERLANDS
- - - - M A - R K E f - - - -ReS.Vessel
quarter
quarter
quarter
quarter
-------- - - - - - - WOOdenSea
estuarium
1987
------- - - - 1st quarter
2nd quarter
3th quarter
4th quarter
176
200
--------
- - - - - ----6160
Total Annually
4631
------
SAMPLINGDATAFOR: BRILL
1987
NETHERLANDS
NUMBERS OF FiSH-SAMPLEO--PERIOD
ftPEA
•
- - - - - M A-R K-E-f---rrieasured
-Res.
-Vessel
--
--~-- - ~ -
-------- -------- ------ ------- ----North Sea
1st
2nd
3rd
4th
quarter
quarter
quarter
quarter
932
732
641
232
102
107
89
83
5
58
11
- - - - - - - --------- - - - - Zeeland
estuarium
1st
2nd
3th
4th
quarter
quarter
quarter
quarter
---------------- - - - - - -381
- - - ------Total Annually
2537
75
----------------- - - - - -
- 26 -
SAMPLING DATA FOR:
SO LE
1987
NETHERl.PNDS
- - - NUMBERS OF FISH SAMPLEo--PERIOD
- - - - M A Ri<-E-f-measured
North Sea
1st
2nd
3rd
4th
990
1637
quarter
quarter
quarter
quarter
Wa:i:jen Sea
estuarium
1st quarter
2nd quarter
3th quarter
4th quarter
Zeeland
estuarium
1st quarter
2nd quarter
3th quarter
4th quarter
--~
870
518
406
691
270
42
39
4188
TURBOT
Vassel
63
12
Total Annually
SAMPLING DATA FOR:
-<Q:d-
Res.
1 987
1350
NETHERl.PNDS
- - NUMBERSOF FiS"H-SAMPLEO---PERIOD
Ne.
----MÄ-Ri<-E-f----
-Res.Vessel
------ -<Q:d
-measured
- - - - - - - -------- - - - - - ------- ------
--~---
North Sea
1st
2nd
3rd
4th
quarter
quarter
quarter
quarter
1342
1317
1208
515
102
112
109
100
4
22
90
32
--------- ---------- - - - - - ------- -----Zeeland
estuarium
----------Total Annually
1st
2nd
3th
4th
quarter
quarter
quarter
quarter
--------
---------- ---------
- - - - - - ------423
4382
------- ------
-----149
------
-
- 27 -
1987
SAMPLING OATA FOR: DAß
N<EA
PERIOD
NETHERlANDS
- - - - -M A-R KTI----
Res. 'Jessei
---------measured
~
- - - - - -----~
-------NorthSea
1st quarter
2nd quarter
3rd quarter
4th quarter
-------Wa:ldenSea
estuarium
768
544
898
- - - - - - - - - ----1st quarter
2nd quarter
3th quarter
4th quarter
-------- -------Zeeland
estuarium
+1- 500
- - - - - -------
1st quarter
2nd quarter
3th quarter
4th quarter
69
59
---69
50
2457
Total Annually
SAMPLING OATA FOR: FLOUNDER
1987
NETHERlANDS
- - NUMBERSOF FiSH SAMPLE-O---PERIOO
MA R K E f - -
-~-
measured
North Sea
1st quarter
2nd quarter
3rd quarter
4th quarter
-Res. Vessel
+1- 500
- 28 -
~
(T. Jakobsen)
Sub-areas land 11
The research activities at sea were slightly reduced compared to 1986
because of reduced funds for hiring commecial vessels. The research
vessels. however, carried out the same programme as in 1986. The
distribution and abundance of young cod and haddock and of redfishes
in the Barents Sea were investigated during a combined acoustic and
stratified bottom trawl survey in January - March. The distribution
and abundance of spawning cod was investigated during an acoustic
survey of the Lofoten area in March.
Combined with shrimp
investigations, the distribution of young cod 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 cod, haddock,
redfishes, catfishes, and Greenland halibut were investigated in the
Svalbard area in September - October. Part of this survey was included
in a multi-species acoustic survey carried out during the same period,
when the distribution and abundance of cod, haddock and redfishes were
investigated also in the Barents Sea.
Investigations on distribution and drift of cod eggs were carried out
in February and investigations on cod larvae and post-larvae were
carried out in April
July. In August
September the annual
international O-group survey, aimed primarily at cod, was carried out
in the Barents Sea and adjacent waters.
Investigations on distribution and drift of haddock eggs were carried
out in April-May, and the distribution of O-group haddock was charted
in August - September during the international O-group survey.
Investigations on distribution and drift of saithe eggs were'carried
out in February - March. o An O-group (post-larvae) s~rvey for saithe in
the area from Stad (62 N) to north of Lofoten (69 N) was carried out
in May, and an aioustic survey for saithe on the coastal banks from
North Cape to 62 N was carried out in October-November.
The distribution of silver smelt was studied on the coastal banks
during a survey in March - April.
The sampling programme for commercial catches of cod, haddock, and
saithe was continued. Samples of redfish and Greenland halibut were
also taken.
Sub-area IV
The distribution and abundance of 1- and II-group gadoids were studied
in February as part of the International Young rish Survey. In April
an investigation on post-larvae of saithe was undertaken in Norwegian
waters, while the distribution and abundance of O-group of other
gadoids were studied in July in the northern North Sea. In February
and July, the distribution and abundance of saithe were investigated
during acoustic surveys in the northern North Sea. The distribution
and abundance of sandeel in the Norwegian economic zone were
investi~ated during an acoustic survey in Kay. The sampling of
commerclal catches of sandeel, Norway pout, and saithe was continued.
- 29 -
MARKET
RESEARCH VESSEL
AREA SEASON
Aged
I'leasured
Aged
Measured
NO. of .INO' of No. Of,INO. of No. of ,INO' of No. of ,INO' of
samples fish samples fish samples fish samples fish
1
2
3
4
35
8
6
15
1072
348
379
833
202
227
217
68
11466
24741
20836
8254
8
16
9
5
1008
1893
990
570
82
110
22
60
3883
8879
1958
4755
IIA
1
2
3
4
46
4
2067
172
125
89
119
65
15382
18442
3264
2619
38
27
9
9
7638
3821
1000
1596
276
200
56
79
14480
16481
2838
4042
IIß
1
2
3
4
1
3
42
26
26
93
2339
1149
4
54
288
79
536
8016
25290
5315
4
4
5
503
435
617
4
39
120
91
236
5288
13793
14669
1
2
3
4
40
570
52
2
24
40
580
5
162
200
12
168
9
2
90
58
IVA
IVß
61
.
-
.
30 -
HADDOCK
RESEARCH VES SEL
AREA SEASON
Aged
MARKET
Measured
Aged
Measured
No. of ;INo. of No. of No. of No. of No. of No. of ;INo. of
sampies fish samp les fish sampies fis h sampies fish
I
1
2
3
4
24
558
UA
1
2
3
4
Uß
1
2
3
4
IVA
IVß
1
3
4
1
3
4
10
-
524
15 6
18 3
15 o
47
17976
18503
20806
3178
5
14
16
10
29 3
82 7
132 8
77 6
81
115
26
42
4270
12126
2682
1250
21
1
1
2
635
70
52
85
96
62
9o
48
8969
4230
2589
1268
16
16
2
11
160 3
118 3
15 5
96 2
228
147
25
30
21615
9158
176
1104
2
126
20
298
20
-
71
22
1014
-1
-
8
-
-
498
-
3
46
9
71
47
2o
12
3
4
7132
1846
249
1338
10
94
-
--
--
-
-
11
12
480
5
9
-
---
e
32
-
-
--
-
e
- 31 -
RESEARCH VESSEL
AREA SEASON
Aged
MARKET
Aged
Measured
Measured
No. Of,INO' of No. of ,INO. of No. of .INO. of No. of ,INO. of
sampIes fish sampIes fish sampIes fish sampIes fish
60
1
2
3
4
IIA
lIB
IVA
IVB
1
2
3
4
18
17
444
12
1
3
1
2
3
4
21
1459
29
1525
1
4
38
22
22
3
706
2477
2957
20
1
1
5
2
123
16
349
291
1
7
7
1
1
83
1723
246
51
113
38
33
693
4692
3172
2757
6
7
6
8
520
799
3591
1223
10
6
1
2
2394
442
646
318
1
7
17
42
23
18
43
1916
729
723
512
10
295
3
4
1
5
208
243
68
234
194
84
194
Tagged: Sub-area Ir 3rd quarter: 600
GREEHLAHD HALIBUT
RESEARCH VESSEL
AREA SEASON
Aged
MARKET
Measured
Aged
Measured
No. of i INO. of Ho. of .IHo. of No. of ,IHO. of No. of i IHO. of
samples fish samples fish samples fish samples fish
1
2
3
4
55
36
47
8
200
240
154
34
lIA
1
2
3
4
20
8
32
9
124
141
1522
113
UB
1
2
3
4
4
20
172
38
127
492
5266
638
2
322
10
581
- 32 -
RESEARCH VESSEL
AREA SEASON
Aged
MARKET
Measured
Aged
Measured
No. of ;INO. of No. of ;INO. of No. of ;INO. of No. of ;INO. of
samples fish samples fish samples fish samples fish
IIA
1
2
3
10
1
5
4
9
1
3
11
4
11
12
1
11
12
IIB
IVA
IVB
2
52
2
16
8
13
4
4
RESEARCH VESSEL
AREA SEASON
Aged
MARKET
Measured
Aged
Measured
No. of ;INO. of No. of ;INO' of No. of ~NO' of No. of ;INO' of
samples fish samples fish samples fish samples fish
IVA
1
2
3
4
18
774
56
4
54
28
3055
26
1245
650
IVB
1
3
12
342
13
2
681
8
.
.
- 33 -
NORWAY POUT
RESEARCH VESSEL
Aged
AREA SEASON
MARKET
Measured
Aged
Measured
No. of No. of No. of No. of No. of No. of No. of No. of
sampIes fish sampIes fish sampIes fish sampIes fish
-
I
1
2
4
IIA
1
2
3
4
IIB
3
4
IVA
1
12
200
2
3
4
IVB
1
4
102
4
52
4
2
629
32
80
41
3
9
22
1117
1
3
1
6
55
10
30
52
5451
274
1603
3580
10
2
608
127
13
458
1210
4
3
4
399
301
345
2
200
3
2
237
173
BLUE WHITING
MARKET
RESEARCH VESSEL
AREA SEASON
Aged
Measured
Aged
Measured
No. of No. of No. of No. of No. of No. of No. of No. of
sampIes fish sampIes fish sampIes fish sampIes fish
•
I
1
2
4
52
10
2
984
173
13
IIA
1
2
3
4
45
13
23
23
611
527
652
298
IIB
1
3
4
1
8
13
45
4
34
5
80
19
500
2707
IVA
IVB
1
2
3
4
2
9
33
19
- 34 -
LONG ROUGH DAß
RESEARCH VESSEL
AREA SEASON
Aged
MARKET
Measured
Aged
Measured
No. of IINO. of No. of IINO. of No. of IINO' of No. of IINO' of
samples fish samples fish samples fish samples fish
1
3
4
160
33
163
40
5413
1117
5435
1600
IIA
1
2
3
4
63
14
61
34
2437
637
2306
1164
IIß
1
2
3
4
5
20
245
58
244
607
20595
2831
1
44
15
35
1265
420
440
9
2
82
32
2
in
3
4
IVB
1
4
-
RESEARCH VESSEL
AREA SEASON
Aged
MARKET
Measured
Aged
Measured
No. of ;INO' of No. of ;INO. of No. of ;INO' of No. of .INO. of
samples fish samples fish samples fish samples fish
IIA
1
3
4
3
1
4
10
3
1
2
3
4
13
1
6
15
32
2
19
33
2
HB
IVA
- 35 -
SILVER SMELT
RESEARCH VESSEL
AREA SEASON
Aged
MARKET
Measured
Aged
Measured
No. Of;INO. of No. of ;INO. of No. of .INO. of No. of ;INO. of
sampIes fish sampIes fish sampIes fish sampIes fish
HA
1
2
3
4
HB
1
4
IVA
1
2
3
4
IVB
4
19
10
13
19
333
44
412
369
2
1
8
2
15
38
63
4
428
403
MARKET
RESEARCH VESSEL
AREA SEASON
Measured
Aged
Measured
Aged
No. Of. INO. of No. of .INO. of No. of ;INO. of No. Of; INO. of
sampIes fish sampIes fish sampIes fish sampIes fish
I
•
HA
IVA
470
3
3
5
478
I
I
2
3
4
IVB
23
I
2
3
4
517
3
2
100
300
200
7
518
262
24
705
53352
27056
2422
100
100
100
35
102
172
3527
10506
17762
36
3633
- 36 -
RESEARCH VESSEL
AREA SEASON
Aged
MARKET
Measured
Aged
Measured
No. Of; INO. of No. of ;INOo of No. of i INO' of No. of ,INO' of
sampIes fish sampIes fish sampIes fish sampIes fish
1
3
4
172
41
32
14
5455
2720
681
411
1
2
3
4
124
50
34
39
5852
1242
2779
2112
IIB
1
2
3
4
1
11
135
61
629
569
6212
3199
IVA
1
3
1
2
18
21
2
IIA
2
2
186
36
61
e
- 37 -
(Fätima Cardador)
During 1987 the National Institute of Fisheries Research (INIP)
has continued with the National Sampling Programm~ at the main
fis hing ports concerning length frequency distribution of the
landings for the most important species.
The Portuguese Institute (INIP) had also conducted some groundfish
surveys mainly to estimate distribution and indices of abundance
and recruitment of the most commercial species.
The following tables present the sampling data colJected for hake
(Herluccius merJL~),black-scabbard (ARb~~),
some species of seabreams (~QQ~,PagelJ\ls ~ and
~ndyliosoma ~ ) and monkfish (Lophius budegassa and
L.~~)
SAMPLING DATA FOR Herluccjus IOOrluccius
AREA
Quarter
No of samples
Research
vessels
41
198
30 694
2 nd
9
206
19 675
3 rd
37
191
14 144
4 th
89
123
18 399
year
176
718
82 912
1 st
IXa
No of fish
measured
Harket
sampIes
- 38 -
SAHPLING DATA FOR
AREA
Quarter
A~_hanQP~
carbQ
No of sampies
Research
vessels
Market
sampies
No of fish
measured
st
2 nd
IXa
3 rd
9
107
9
107
4 th
year
SAMPLING DATA FOR
AREA
Quarter
BQQ~ ~
No of sampies
Research
vessels
IXa
Harket
sampies
No of fish
llleasured
1 st
58
3 760
2 nd
47
3 079
3 rd
47
2 863
4 th
12
44
2 943
year
12
196
12 645
- 39 -
SAMPLING DATA FOR Pagellus acarne
AREA
Quarter
No of sampies
Research
vessels
lXa
•
Market
sampies
56
3 1021
2 nd
59
3 180
3 rd
46
3 038
4 th
12
45
3 683
l'ear
12
206
13 522
Quarter
~ondyliosQID~
~ntb~
No of sampies
Research
vessels
IXa
of fish
measured
st
SAMPLING DATA FOR
AREA
No
No of fish
measured
Harket
sampies
1 st
20
394
2 nd
24
291
3 rd
18
241
4 th
20
295
82
1 221
l'ear
5
- 40 -
SAMPLING DATA FOR Lophius budegassa
AREA
Quarter
No of sampies
Research
vessels
1 st
Market
sampies
No of fish
measured
25
1510
3 rd
17
53
4 th
11
67
year
53
2710
2 nd
IXa
SAMPLING DATA FOR Lophius piscatorius
AREA
Quarter
No of sampies
Research
vessels
1 st
No of fish
measured
Market
sampies
3
3
3 rd
3
3
4 th
12
26
year
18
32
2 nd
IXa
•
SPECIES:
trachurus trachurus (L.)
SAMPLING
Type
Season
Ärea
1st
IXa
of
fish
quarter
.
2nd
4th
Nr. of fish aged
Market .
Measured
(Otoli ths)
22
257
28 839
605
277
29 778
342
214
17 262
212
37
106
17'262
1 325
59
854
93 141
2 484
..
TOTAL
Nr. of fish
R!V
All
.
.
3rd
Nr .. of sampIes
RESEARCH VESSEL SURVEYS
Ärea
Div IXa (partial)
Div IXa
Div IXa
Data
Objective
24-2-87 a 2-3-87
Co11ection of fecundity da ta and prospection
on spawning grounds
3-24 Oct
(south)
30-11-6-12 Dez
Estimation of abundance and biomass 'indices
by stratified bot tom trawl survey
Collection of further bio1ogica1 data
Scomber scombrus (L.)
1987
"Area
Seascn
Type cf
fish
IX a
1st
2nd
3rd
4th
quarter
quarter
quarter
quarter
Nr. cf samp1es
research
vesse1 market
-
a11
TOTAL
Nr. cf fish
measured
Nr. cf fish aged
(ctcliths)
Nt".cf fish
examined
'!'acia11y
-
-
149
180
161
98
10
12
11
7
527
606
545
124
70
187'.
168
123
-
-
588
41 802
548
-
-
I
.".
Scomber japonicus (Houttuyn)
I\)
I
1987
SAMPLING
. Seascn
Area
Type cf
fish
1st
IX a
2nd
3rd
4th
TOTAL
quarter
quarter
quarter
quarter
Nr. cf samp1es
research
vesse1 market
Nr. cf fish aged
Nr.cf fish
examined
racia11y
measured
(ctcliths)
1 593
2 989
2 291
1 884
136
226
169
43
-
5
35
53
33
28
5
149
8 757
574
-
_.
a11
Nr. cf fish
-
-
-
-
Sampling on b1ue whiting Micromesistius poutassou (Risso)
1987
Region
Type of
~arter
fishes
a
vesse1
liarbour
6786
82
88
3 rd
-
50
-
4 th
55
29
3411
2581
TurAL
55
248
3411
20805
2 nd
All
N. fishes
N: fishes measured
N. fishes aged
harbour
-
1 st
IX
N: Sainp1es
vesse1..
7324
4172
examined racia11y
LEPIDORHOMBUS WIFF IAGONIS
AREA
SEASON
1
2
3
4
VI
I
2
3
4
VII
1
2
3
4
VlIIab
1
2
3
4
VIIlc
,
1
2
3
4
IXa
e
1987
No. OF
REESEARCH
VESSELS
------------39
44
--
-19
--
----
SAMPLES
MARKET
SAMPLES
No.
OF
FISH
MEASURED
---
0
0
I
0
----36
15
17
16
14
3049
3176
2716
2545
7
16
15
22
504
890
673
1586
12
8
6
7
654
3723
72
188
;:;;
~
..,""
'"
..,"''""
27
5
2
4
4
--
---
e
~
I~
.t.t-
•
LEPIDORHOMBUS BOSCll
AREA
VI
SEASON
-I
VII
VIIIab
VIIIc
I,
IXa
2
3
4
1
2
3
4
1
2
3
19B7
No. OF
REESEARCH
VESSELS
SAMPLES
IlARKET
SAMPLES
No.
OF
--
--
--
--
13
15
14
12
293
484
615
498
---------
39
40
4
---
1
2
3
4
-----
19
FISH
MEASURED
I
...
7
12
5
16
19
23
14
406
12
8
6
7
2661
3040
321
319
5
6
6
1733
515
524
319
4
V1
LOPHIUS PISCATORIUS 1987
AREA
VI
SEASON
VIIIab
VIIIc
•
IXa
SAJCPLES
llARKET
SAMPLES
No.
OF
-----
-----
--
11
11
15
15
1212
992
1253
1354
1
2
3
4
-----
7
11
8
26
564
498
279
1288
1
2
3
4
39
31
11
7
8
8
259
196
66
77
19
---
2
3
4
1
2
3
4
--
-----------
--
-
---
FISH
JlEASURED
----
1
2
3
4
I
VII
No. OF
REESEARCH
VESSELS
--
19
-----
IOPHIUS BUDEGASSA 1987
AREA
VI
VII
VIIlab
VIIIc
I.
IXa
SEASON
No. OF
REESEARCH
VESSELS
SAMPLI!S
MARKET
SAMPLES
No.
OF
--
--
--
--
I
-----
10
2
3
4
15
15
486
414
518
509
1
2
3
4
------
3
10
26
1
2
3
4
39
42
1
2
3
4
---19
----
11
7
11
7
8
9
-----
FISH
MEASURED
464
381
288
1605
512
530
183
212
53
--
----
Merluccius merluccius
AREA
VI
VII
VIIIab
VIIIc
,
IXa
SEASON
1
2
3
4
I
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1987
No. OF
REESEARCH
VESSELS
-------
SAMPLES
MARKI!T
SAMPLES
No.
OF
I
2
2
116
274
303
16
18
16
16
3503
3829
3877
3366
16
15
18
39
2587
4314
3183
5032
39
49
32
27
20
41
7608
8689
1702
2840
19
22
25.
25
17
4199
2489
2588
1652
--
--
----
---
--
----
---
--
FISH
MEASURED
--
- 49 -
SWEDEN
(B. Sjöstrand)
Sweden took part in the International Younq Herrinq Survey in the
North Sea and Skagerrak. It has no other activities on which to
report.
UNITED KINGDOM (England and Wales)
•
(W. G. Parnell & C. T. Macer)
The market sampling programme was continued in 1987.
The number of
fish measured and aged from the market sampies is shown in the tables.
The following research cruises took place in 1987.
In January a collection of Stage IV female plaice gonads from the
Hinder grounds was made on CLIONE for a study of year-by-year fecundity variation.
In February CIROLANA participated in the International Young Fish Survey.
Studies on the migration of plaice moving to and from their spawning grounds
in the eastern Channel in relation to the larvae cycle were carried out on
CLIONE in March. In the same month, CIROLANA made a trawl survey of the western
English Channel, Celtic Sea and Bay of Biscay as part of a continuing programme
of stock monitoring in the area, and a charter vessel carried out a groundfish
survey along the Welsh coast.
In April-a charter vessel carried out a 2-metre beam trawl survey along
the East Anglian coast to estimate the post-winter population of juvenile
sole.
Charter vessels were used to carry out a pre-recruit bass survey in
the Solent and Southampton Water in May, a groundfish survey off the Welsh
coast in June, and
2 m beam trawl surveys to sampie juvenile fish and identify
sole nursery grounds in the Irish Sea between July and October.
CLIONE carried out a trawl survey of plaice and sole in ICES areas VIId
and the western edge of IVc in August while CIROLANA made the 11th English
Groundfish survey in the North Sea in August/September.
•
In September CLIONE carried out a survey for 0- and l-group gadoids in
the northwestern Irish Sea using a granton trawl, and pre-recruit flatfish
surveys in the eastern Irish Sea and Bristol Channel using a 3 m beam trawl.
A young demersal fish survey using 2 m beam trawls and push nets was
carried out along the English east and south coasts between the Wash and
Swanage in September.
A double beam trawler was chartered to carry out a survey
for sole in the western Channel, and a pre-recruit bass survey was undertaken
in the Solent and Southampton Water also in September. In the western English
Channel, Celtic Sea and Cardigan Bay in October/November, plaice ovaries were
collected and sole sampIes taken on CIROLANA.
CIROLANA carried out a trawl survey of the western Celtic Sea in November/
December. A study of the migration of plaice moving to and from their spawning
grounds in the eastern English Channel in relation to maturity stage, day/
night and tide took place on CLIONE in December. A charter to estimate the
population of O-group/juvenile bass was carried out in the River Medway also
in December ..
- 50 Sampling data for BASS
Area
IVc
Season
Qtr
Qtr
Qtr
Qtr
1
2
3
4
Vlla
Number of
market
sampIes
Number of flsh
Measured
(market)
Aged
22
10
44
150
33
3
48
289
33
Qtr 2
Qtr 3
3
3
13
75
13
75
Vlld
Qtr 2
Qtr 3
9
9
250
79
336
59
Vlle
Qtr
Qtr
Qtr
Qtr
1
2
3
4
6
15
7
6
448
265
172
167
14
52
58
130
Vllf·
Qtr 2
Qtr 3
1
9
3
209
16
95
Vllh
Qtr 1
21
27
13
Sampling data for COD
Area
Season
Number of
market
sampIes
Number of fish
Measured
(market)
Aged
la
Qtr
162
25
Id
Qtr 2
214
17
lla
Qtr 2
Qtr 4
228
99
31
llf
Qtr 1
Qtr 2
Qtr 3
5
2
860
583
317
103
81
24
llg
Qtr 2
Qtr 3
5
2
716
444
98
73
IVa
Qtr
Qtr
Qtr
Qtr
6
18
8
2
862
2952
1020
232
40
179
89
152
1
2
3
4
4
•
- 51 -
Sampling data for COD (continued)
Area
•
•
Season
Number of
market
sampIes
Number of flsh
Measured
(market)
Aged
IVb
Qtr
Qtr
Qtr
Qtr
1
2
3
4
151
171
122
126
23324
27406
21259
20527
1608
1583
1426
1044
IVc
Qtr
Qtr
Qtr
Qtr
1
2
3
4
20
22
22
19
3840
3794
3082
2516
252
275
291
266
VIa
Qtr 1
Qtr 2
Qtr 3
8
1210
1504
140
163
149
58
166
27
2931
2473
2681
2449
497
434
335
339
VIb
Qtr 2
VIIa
Qtr
Qtr
Qtr
Qtr
1
2
3
4
9
1
23
14
17
19
VIId
Qtr 1
Qtr 4
120
34
13
VIIe
Qtr 3
Qtr 4
36
2
51
VIIf
Qtr
Qtr
Qtr
Qtr
1
2
3
4
6
3
517
400
44
26
2
67
VIIg
Qtr 1
Qtr 2
Qtr 3
4
482
112
54
56
VIIh
Qtr 3
26
VIIj
Qtr 2
131
49
XIIIa
Qtr 3
Qtr 4
1748
127
192
11
1
- 52 Samp1ing data for DOGFlSH
Area
Season
Number of
market
sampies
Number of Hsh
Measured
(market)
IVa
Qtr 2
Qtr 3
Qtr 4
IVb
Qtr
Qtr
Qtr
Qtr
1
2
3
4
6
21
25
16
96
905
1634
1463
IVc
Qtr
Qtr
Qtr
Qtr
1
2
3
4
4
9
10
9
206
421
760
724
VIa
Qtr 1
Qtr 2
Qtr 3
6
6
1
709
594
140
VlIa
Qtr
Qtr
Qtr
Qtr
7
8
12
6
639
832
1313
551
1
2
3
4
Aged
75
25
134
•
Samp1ing data for HADDOCK
Area
Season
la
Qtr 3
lIa
Qtr 2
Qtr 4
lU
Qtr 1
Qtr 2
Qtr 3
lIg
IVa
Number of
market
sampies
2
Number of Hsh
Measured
(market)
Aged
145
30
65
103
18
4
4
1
487
512
141
46
43
22
Qtr 2
Qtr 3
3
2
345
378
10
34
Qtr
Qtr
Qtr
Qtr
6
9
6
1
1159
1164
1112
237
94
125
59
36
1
2
3
4
- 53 -
Sampling data for HADDOCK (continued)
Area
•
Season
Number of
market
sampies
Number of flsh
Measured
(market)
Aged
IVb
Qtr
Qtr
Qtr
Qtr
IVc
Qtr 1
Qtr 3
Qtr 4
VIa
Qtr
Qtr
Qtr
Qtr
1
2
3
4
9
13
1
5
1686
2187
140
937
220
243
94
147
Vlb
Qtr 1
Qtr 2
Qtr 4
1
8
1
164
1521
234
21
182
52
XII Ia
Qtr 3
4
429
62
1
2
3
4
61
66
55
63
9692
10390
8029
10046
593
693
567
591
83
87
143
Sampling data for HAKE
Area
•
Season
Number of
market
sampies
Number of flsh
Measured
(market)
Aged
VIa
Qtr 2
Qtr 3
3
1
804
230
VIIa
Qtr
Qtr
Qtr
Qtr
1
2
3
4
5
4
4
2
1094
732
1139
399
VIIe
Qtr
Qtr
Qtr
Qtr
1
2
3
4
7
5
7
5
939
680
595
550
33
VIIf
Qtr 1
Qtr 2
Qtr 4
2
2
2
269
271
201
34
33
Qtr 1
Qtr 2
Qtr 4
1
7
142
220
VIIh
Qtr 3
2
139
VIIj
Qtr 2
Qtr 4
VIIg
19
28
36
178
2
108
36
59
- 55 Sampling data for MEGRIM
Area
•
Season
Number of
market
sampies
Number of flsh
Measured
(market)
VIIe
Qtr
Qtr
Qtr
Qtr
1
2
3
4
2
1
1
5
331
126
140
937
VIIf
Qtr 1
Qtr 2
Qtr 4
3
3
1
459
502
180
Viig
Qtr 1
Qtr 4
137
VIIh
Qtr 2
Qtr 3
Qtr 4
3
5
1
Aged
84
692
712
137
Sampling data for PLAICE
Area
Season
IVa
Qtr 2
Qtr 3
Qtr 4
IVb
Qtr
Qtr
Qtr
Qtr
IVc
Qtr 2
VIIa
Qtr
Qtr
Qtr
Qtr
1
2
4
4
VIId
VIIe
Number of
market
sampies
Number of flsh
Measured
(market)
Aged
4
7
1
912
1611
177
96
172
50
41
36
31
28
8679
9160
6881
6887
821
855
796
622
249
25
16
14
14
12
3103
2883
2702
2307
376
308
383
Qtr 1
Qtr 2
Qtr 3
1
32
14
146
3727
1389
472
123
Qtr
Qtr
Qtr
Qtr
24
15
14
3452
2374
2225
2221
278
168
237
144
1
2
3
4
1
2
3
4
17
- 57 -
Sampl1ng data for SOLE
Area
Season
Number of
market
Number of fish
samples
Measured
Aged
(market)
IVa
Qtr 4
IVb
Qtr
Qtr
Qtr
Qtr
IVc
2
346
65
1
2
3
4
19
10
10
12
3170
1133
839
1596
285
136
114
141
Qtr
Qtr
Qtr
Qtr
1
2
3
4
2
21
25
10
83
3282
2904
1012
12
202
302
26
VIIa
Qtr
Qtr
Qtr
Qtr
1
2
3
4
16
19
15
16
2701
2948
2567
2345
150
205
223
145
VIId
Qtr
Qtr
Qtr
Qtr
1
2
3
4
94
80
2
8175
6291
358
49
676
557
3
VIIe
Qtr
Qtr
Qtr
Qtr
1
2
3
4
23
9
13
20
4034
1554
2392
3825
76
56
189
112
Vllf
Qtr
Qtr
Qtr
Qtr
1
2
3
4
7
9
1304
1581
77
368
22
16
Qtr 1
Qtr 3
Qtr 4
6
Qtr 3
Qtr 4
3
1
VIIg
•
Vllh
1037
3
54
434
134
- 58 -
Samp11ng data for WHITING
Ares
Season
Number of
Number of Hsh
market
sampies
IVa
Qtr 1
Qtr 2
Qtr 4
IVb
Qtr
Qtr
Qtr
Qtr
IVc
Qtr
Qtr
Qtr
Qtr
VIa
Qtr
VIIa
Qtr
Qtr 2
Qtr 3
Qtr 4
Measured
(market)
Aged
3
2
2
310
158
192
83
46
1
2
3
4
47
50
41
52
4139
4201
3905
4528
406
480
343
354
1
2
3
4
7
7
11
10
584
623
973
836
98
83
168
134
2
138
26
2762
1891
2045
1979
17
19
19
352
420
120
193
VIId
Qtr 3
VIIe
Qtr
Qtr
Qtr
Qtr
1
2
3
4
18
13
14
16
2999
2329
2329
2188
156
141
112
98
VIIf
Qtr
Qtr
Qtr
Qtr
1
2
3
4
2
280
1
2
192
46
50
36
51
3
414
VIIg
Qtr 1
Qtr 3
18
26
14
- 59 -
•
UNITED KINGDOM
(Scotland)
,(R •• JOnes)
1.
Sampling Demersal Fish
Continuous monitoring was maintained on the catches caught by the five main gears
(motor trawl, seine net, light trawl, Nephrops trawl and demersal pair trawil used by
Scottish fishermen. Landings were sampled at a11 the major fishing ports in Scotland
and the intensity of sampling Is Indicated in the text table below.
•
Species
Cod
Haddock
Whitlng
Saltlle
No of vessels
sampled
measured
No of fish
No of otoliths
collected
391
401
355
245
60161
141899
8411Z
14148
14236
11310
9543
1310
Sampling of demersal fish dlscarded by the Scottlsh fleet was also carrled out on a
regular basis in 1981. Sampies were obtalned durlng the course of commercial trips
from
hauls. The Intenslty of sampling Is Indlcated in the text table below.
Species
No of vessels
sampled
No of fish
measured
No of otoliths
collected
Cod
Haddock
Whiting
Saltl1e )
Others )
56
56
56
8551
65064
44269
1408
3213
3258
56
59869
2.
Research Vessel Activlties
In February 1981 "Scotia" participated In the International Young Fish Survey In the
North Sea.
•
In March 1981 "Scotia" carrl;'d out a survey of demersal fish and herring stocks off the
west coast of Scotland (lCES Sub area VIa).
In August 1981 "Scotla" carrled out a survey of demersal fish stocks in the northern
and middle North Sea «CES Sub area IVa and 1Vb).
In June 1981 "Clupea" carrled out a pelaglc Q-group survey for gadold species in the
northern North Sea «CES Sub area IVa).
In August 1981 a commercial vessel, the "Dawn Sky", was chartered to carry out a
survey of the haddock stock on Rockall Bank.
3.
Tagging of D..mersal Fish
Durlng August 1981,352 salthe were tagged at an lnshore site close to Aberdeen.
- 60 -
U.S.A.
(V. Anthony & B. Rothschild)
The U.S.A. had no fisheries and no research activity in the leES area in
19B7. Activities in the Northwest Atlantic in 1987 have been reported to
NAFO.
U.S.S.R.
(S. A. Studenetsky)
In 1987, as previously, a total trawl-acoustic survey was
carried out to assess abundance and biomass of main commercial
fishes, recruitment to cod, haddock, redfish and other fish
stocks was evaluated during ichthyoplankton and young fish
surveys in the Barents Sea and adjacent waters.
Investigations were continued to determine relationships
between distribution of fish, their behaviour and hydrological
conditions, food supply. Stock structure of major commercial
fishes, their biological characteristics and migration patterns were studied.
Tables 1-8 present information collected during 1987.
•
- 61 -
Data on cod collected in 1987.
Area
Season
I
II
liJ
I
IY
.. I
e
IIB
-. U
m
IY
I
II
IIa
m
IY
Total
. ,
Measured
NUmber
Analysed for
fee ding
Aged
21438
23492
29607
77557
17617
43586
53806
3071
55604
43432
1582
1691
2386
2284
3039
I0903
1445
46IO
7566
579
4597
5091
604
953
641
1292
II05
6854
900
2600
3429
324
2520
2226
258
190
372483
44057
22339
Data on haddock collected in 1987.
Area
Season
I
U
I
e
m
1Y
I
IIB
lla
II
ru
1Y
26001
19146
16276
97914
523
91 .
377
2127
1621
890
13996
98
129
1
Aged
1751
1003
300
6524
48
45
1
I
19526
1098
300
II
26823
1357
2921
358
201?
768
1798
229
369
210051
-24007
12368
m
1Y
Total
MeasJ,U'ed
Number
Analysed for
feeding
- 62 -
Data on plaice collected in 1987.
Area
I
Season
I
II
m
lY
Measured
Number
Analysed for :
feediD.ß
4662
368
6II
5408
1271
200
125
845
10
9
II059
2450
Aged
572
200
200
516
1
llB
II
m
lY
1
lla
II
m
lY
Total
1488
Data on long rough dab collected in 1987.
Area
Season
II
IU
2711
315
392
lY
9'700
150
50
136
548
I
254
25
10536
1651
1
I
nB
Measured
Number
Analysed
for feeding
Aged
25
25
n
m
200
IY
lla
1
35
II
133
1279
912
150
240
26267
2950
m
IY
Total
250
- 63 -
•
Data on catfish collected in 1987.
Area
:Season
I
I
II
Measured
797
136
Humber
Analysed
for fee ding
27
48
Aged
2
48
9
480
rn
70
9
1Y
2019
733
I
470
II
38
2514
6
25
17
785
5
17
784
20
20
rn
1Y
I
IIa
II
UI
1Y
Total
II
HO
91
165
72
72
56
37
6427
1797
1469
Data on redfish collected in 1987.
Number
Area
Season
Aged
1632
2186
6
6273
172
38
300
680
680
5051
5300
750
83?
500
UI
IY
670
165
IOO
I
9157
17903
H63
3731
600
2134
I
I
:Ileasured
Analysed for
fee ding
II
rn
1Y
I
I
IIB
IIa
II
II
m
1Y
Total
625
2278
184
159
5432
997
664
55888
8717
5763
•
- 64 -
Data on Greenland halibut collected in 1987.
Number
Area
1
Season
I
II
III
IY
llB
I
II
III
IY
lla
I
II
III
IY
Measured
203
50
65
264
2532
858
5277
746
1064
388
133
2546
14126
Total
Analysed for
fee ding
Aged
45
I
I
698
600
100
1413
525
300
928
125
78
I
26
520
3531
1830
Number
Analysed
: for feeding
Aged
Data on saithe collected in 1987.
Area
Season
Measured
I
I
DB
II
III
II7
317
73
25
IY
150
25
I
II
1
m
I
IY
lla
I
87
D
1269
14
340
258
2369
401
m
IY
Total
4
93
4