Estimates of stock size of cod, haddock, redfish and greenland halibut in the Barents Sea and the Svalbard area, autumn 1987
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http://hdl.handle.net/11250/104515Utgivelsesdato
1988Metadata
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This report is not to be cited without prior reference to the authorsSammendrag
Combined acoustic and bottom trawl survey for cod and haddock were carried
out in the Svalbard area together with an acoustic survey in the Barents
Sea in autumn 1987. The abundance index in numbers of cod continued to
increase in the Svalbard area , mainly because a larger part of the stock
has become aqoustically detectable. In the Barents Sea the index has
decreased a little since previous autumn and same mole since last winter,
partly because of an inadequate area coverage in southeast and more
scattered registrations than during the winter survey. The results for
haddock show that the stock is almost not present in the Svalbard area and
that it is decreasing in the Barents Sea. The abundance of the redfish
species Sebastes marinus and S. mentella have decreased both in the
Svalbard area and in the Barents Sea, while the abundance index of
S. viviparus show a huge increase, mainly because of better area coverage
in southwest. The abundance of Greenland halibut is decreasing, probably
because of recruitment failure.