Translation Series No.1211

• Table
20. Additional catch of cod in the salmon fishery,
yields and captures per unit effort.
Number Month 1957/8 1958/9 59/60 60/1 61/2 6 2/3
of cod
• Sept. 2,3
Okt. 10,2 19,7 15,0 6,2 0, 1 . 16,7
per Nov. 44,7 24,9 27,7 23,0 7,6 9,5
1000 pez. 21,0 14,7 DA 17,7 10,3 5,3
Jan. • 26,5 11,7 8,5 UA 6,0
hooks Febn 7,4 10,4 5,9 3,3 1,7
Mâm 2,6 3,0 IA 1,4
per 100 nets Apr./May 1,0 0,5 0,3 0,6 0,5 0,1
Total number
of cod . 100 000 45 000 48 000 34 000 30 000 12 000
..... . .
- 59 -
Ceeke ,",
Table 20 shows that the c-aptux-e.s per unit effort of cod and the
yields have declined considerably in recent years. The decline of the
catches has been caused, apart from changes in the stock of cod, also by
. the reduction in the intensity of line fishery. The greatest yields of
cod are Obtained in the months of November/December. Later the fish return
to the sea bottom in order to form pre-spawning aggregations . and to move
to the spawning grounds .
The other species of additional catches are quantitatively of
small importance, but they are worth noting on account of the species com-
position. In the line fishery up to 20 sea hares (Cvolonterus lumpus) of
a length of 10 to 15 cm axe caught during a voyage. Besides these there
are found occasionally trigger fish and flatfish (flounder, turbot) and, •
more rarely, mackerele In one case it is known with certainty that a
seal has been caught on a hook. Guillemots that dive for the bait and
gulls that feed on the intestines of hooked cod, are Caught frequently
on the hooks by the bill. However, they can usuallY be freed and released.
In drifnet fishing the flounder'plays the main -role as an