Estimates of stock size of northeast arctic cod and haddock, Sebastes mentella and Sebastes marinus from survey data, winter 1989
The combined acoustic and bottom trawl survey in the Barents Sea in winter has been carried out since 1981. The target species are cod and haddock, but in recent years the redfish species Sebastes marinus and Sebastes mentella have also been included. Since 1982, an acoustic survey for spawning cod...
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ftimr:oai:imr.brage.unit.no:11250/100277 2024-09-15T17:52:28+00:00 Estimates of stock size of northeast arctic cod and haddock, Sebastes mentella and Sebastes marinus from survey data, winter 1989 Jakobsen, Tore Mehl, Sigbjørn Nakken, Odd Nedreaas, Kjell Harald Sunnanå, Knut 1989 733346 bytes application/pdf http://hdl.handle.net/11250/100277 eng eng ICES ICES CM documents 1989/G:42 This report is not to be quoted without prior consultation with the General Secretary. http://hdl.handle.net/11250/100277 22 s. VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 Working paper 1989 ftimr 2024-07-31T03:37:25Z The combined acoustic and bottom trawl survey in the Barents Sea in winter has been carried out since 1981. The target species are cod and haddock, but in recent years the redfish species Sebastes marinus and Sebastes mentella have also been included. Since 1982, an acoustic survey for spawning cod in the Lofoten area has been carried out immediately after the Barents Sea survey. For cod, the acoustic survey gives a total estimate in numbers which is about 10% lower than in 1988, whereas the bottom trawl survey gives a reduction of about 40%. The difference between the surveys probably to some extent reflects a change in the vertical distribution. Poor recruitment is confirmed by both surveys. A similar difference between the surveys is found for haddock, but the reduction in number is larger, about 30% and 60%, respectively, for the acoustic survey and the bottom trawl survey. Abundance indices for redfish indicate that the stock situation is stabilizing for Sebastes marinus and Sebastes mentella, although at a low level. The results of the Lofoten survey indicate that recruitment to the spawning population of cod is improving. Report Arctic cod Barents Sea Lofoten Northeast Arctic cod Sebastes mentella Institute for Marine Research: Brage IMR |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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ftimr |
language |
English |
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VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 |
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VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 Jakobsen, Tore Mehl, Sigbjørn Nakken, Odd Nedreaas, Kjell Harald Sunnanå, Knut Estimates of stock size of northeast arctic cod and haddock, Sebastes mentella and Sebastes marinus from survey data, winter 1989 |
topic_facet |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 |
description |
The combined acoustic and bottom trawl survey in the Barents Sea in winter has been carried out since 1981. The target species are cod and haddock, but in recent years the redfish species Sebastes marinus and Sebastes mentella have also been included. Since 1982, an acoustic survey for spawning cod in the Lofoten area has been carried out immediately after the Barents Sea survey. For cod, the acoustic survey gives a total estimate in numbers which is about 10% lower than in 1988, whereas the bottom trawl survey gives a reduction of about 40%. The difference between the surveys probably to some extent reflects a change in the vertical distribution. Poor recruitment is confirmed by both surveys. A similar difference between the surveys is found for haddock, but the reduction in number is larger, about 30% and 60%, respectively, for the acoustic survey and the bottom trawl survey. Abundance indices for redfish indicate that the stock situation is stabilizing for Sebastes marinus and Sebastes mentella, although at a low level. The results of the Lofoten survey indicate that recruitment to the spawning population of cod is improving. |
format |
Report |
author |
Jakobsen, Tore Mehl, Sigbjørn Nakken, Odd Nedreaas, Kjell Harald Sunnanå, Knut |
author_facet |
Jakobsen, Tore Mehl, Sigbjørn Nakken, Odd Nedreaas, Kjell Harald Sunnanå, Knut |
author_sort |
Jakobsen, Tore |
title |
Estimates of stock size of northeast arctic cod and haddock, Sebastes mentella and Sebastes marinus from survey data, winter 1989 |
title_short |
Estimates of stock size of northeast arctic cod and haddock, Sebastes mentella and Sebastes marinus from survey data, winter 1989 |
title_full |
Estimates of stock size of northeast arctic cod and haddock, Sebastes mentella and Sebastes marinus from survey data, winter 1989 |
title_fullStr |
Estimates of stock size of northeast arctic cod and haddock, Sebastes mentella and Sebastes marinus from survey data, winter 1989 |
title_full_unstemmed |
Estimates of stock size of northeast arctic cod and haddock, Sebastes mentella and Sebastes marinus from survey data, winter 1989 |
title_sort |
estimates of stock size of northeast arctic cod and haddock, sebastes mentella and sebastes marinus from survey data, winter 1989 |
publisher |
ICES |
publishDate |
1989 |
url |
http://hdl.handle.net/11250/100277 |
genre |
Arctic cod Barents Sea Lofoten Northeast Arctic cod Sebastes mentella |
genre_facet |
Arctic cod Barents Sea Lofoten Northeast Arctic cod Sebastes mentella |
op_source |
22 s. |
op_relation |
ICES CM documents 1989/G:42 This report is not to be quoted without prior consultation with the General Secretary. http://hdl.handle.net/11250/100277 |
_version_ |
1810294490996408320 |