Preliminary report of the Norwegian investigations on young cod and haddock in the Barents Sea during the winter 1982
Original version
This report is not to be quoted without prior consultation with the General Secretary.Abstract
An acoustic survey and a bottow trawl survey for cod and haddock were carried out in the Barents Sea during the winter 1983. The two surveys gave different results. The acoustic survey showed a 50 % reduction from 1982 for the Barents Sea stock of young cod. The largest reductions were found for the 1977-1975 year-classes. For haddoek the reduction in the total stock of young fish was about 48% with the largest reductions found for the 1998-1975 year-classes. The bottom trawl survey showed no such reductions of young fish. In this survey the indices for the younger age-groups (2-5) were higher in 1983 than in 1982 for both cod and haddock. In both surveys the amount of older fish (6-l0+) was significantly lower in 1983 than in 1982, mainly because the abundant 1975 year-class had reached maturity and had migrated out of the investigated area.
Publisher
ICESSeries
ICES CM documents1983/G:15