-2-
BELGIUM
(R. de Clerck)
Recording of densities and growth rates of the 1988 and 1989 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 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).
SAMPLING DATA FOR:
1989
Nr of fish
SOLE
Nr of samples
Area
Season
I
Res. vessels
Market
-
I
Measured
Aged
175
667
537
70
142
207
1
2
3
1
2
6
1
Vllf,g
1
2
3
-
10
4
1
1 096
325
70
200
150
70
VII a
1
2
4
-
9
13
6
-
1 126
1466
28 815
237
430
1 795
-
1
I
210
210
1
I
210
210
IV
VIId,e
1/4
I
VIII
1/4
I
SAMPLING DATA FOR:
1989
Nr of fish
PLAICE
Nr of samples
Area
IV
Vllf,g
VII a
Vlld,e
Season
I Res. vessels
-
1
2
3
l
1
2
3
-
1
2
4
-
1/4
-
-
I
I
Measured
Aged
2
6
1
122
382
850
50
90
300
10
4
1
654
214
50
150
90
50
9
7
519
412
120
100
190
120
150
150
Market
3
-
-
3
I
BELGIUM
BELGIUM
-3SAMPLING DATA FOR:
1989
Nr of fish
COD
Nr of samples
Area
IV
Season
I Res. vessels
Market
-
1
2
3
SAMPLING DATA FOR:
I
7
6
4
IV
Season
1
2
3
Aged
340
300
200
340
300
200
1989
Nr of fish
WHITING
Nr of samples
Area
Measured
I Res. vessels
Market
-
7
-
4
6
I
Measured
Aged
255
300
180
255
300
180
BELGIUM
BELGIUM