•
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~.,
l
BELGIUM
(R. Oe Clerckl
Recording of densities and growth rates of the 1987 and 1988 year
classes of sole, plaice, dab,
flounder,
cod and whiting was
carried out. Two cruises were therefore undertaken according to
the criteria of the International Oemersal Younq Fish Survey. The
groundfish survey was continued in order to estimate the stock
size of adult flatfish in the southern North Sea by means of a
beamtrawl fishery in August. This was part of an international
survey in collaboration with the Outch Institute.
The market sampling was continued covering cod (North Seal,
whitinq (North Seal, haddock (North Seal, plaice and sole (North
Sea-Enqlish Channel-Celtic Sea and Irish Sea. (see following
tablesl.
No. of samples
Area
SOLE
IV
Season
measured
aged
9
12
10
8
840
1,150
1,296
210
220
303
200
8
4
5
7
764
350
395
685
230
139
230
160
1
2
3
4
5
1
448
70
140
70
1
2
3
3
1
1
4
2
210
70
70
160
210
70
70
160
1
2
3
4
VIIf,g
1
2
3
4
VIIa
VIId,e
Res. Vessels
No. of fish
Market
e
,-
I
•
•
- 3 -
No. of samples
Area
PLAICE
IV
Season
Res. Vessels
No. of fish
Market
measured
aged
1
2
3
4
9
12
10
8
562
758
1,428
524
140
130
263
140
VIIf, k
1
2
3
4
8
4
5
7
490
244
252
440
130
100
180
80
VIIa
1
2
3
4
5
1
286
40
100
40
VIId, e
1
2
3
4
3
1
1
2
150
50
50
80
150
50
50
80
COD
IV
1
2
3
4
6
7
8
9
280
353
350
433
280
280
350
390
WHITING
IV
1
2
3
4
9
9
18
11
336
475
610
531
200
175
310
285
HADDOCK
IV
1-4
2
100
100