Estimates of stock size of cod, haddock, redfish and greenland halibut in the Barents Sea and the Svalbard area, autumn 1987
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 bec...
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ftimr:oai:imr.brage.unit.no:11250/104515 2023-05-15T15:38:02+02:00 Estimates of stock size of cod, haddock, redfish and greenland halibut in the Barents Sea and the Svalbard area, autumn 1987 Hylen, Arvid Jacobsen, Jan Arge Mehl, Sigbjørn Nedreaas, Kjell Harald 1988 application/pdf http://hdl.handle.net/11250/104515 eng eng ICES ICES CM Documents;1988/G:44 This report is not to be cited without prior reference to the authors http://hdl.handle.net/11250/104515 26 s. stock assessment bestandsberegning Barents Sea Barentshavet VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Catch: 925 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 Working paper 1988 ftimr 2021-09-23T20:16:11Z 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. Report Barents Sea Barentshav* Greenland Svalbard Institute for Marine Research: Brage IMR Svalbard Barents Sea Greenland |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
topic |
stock assessment bestandsberegning Barents Sea Barentshavet VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Catch: 925 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 |
spellingShingle |
stock assessment bestandsberegning Barents Sea Barentshavet VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Catch: 925 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 Hylen, Arvid Jacobsen, Jan Arge Mehl, Sigbjørn Nedreaas, Kjell Harald Estimates of stock size of cod, haddock, redfish and greenland halibut in the Barents Sea and the Svalbard area, autumn 1987 |
topic_facet |
stock assessment bestandsberegning Barents Sea Barentshavet VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Catch: 925 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 |
description |
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. |
format |
Report |
author |
Hylen, Arvid Jacobsen, Jan Arge Mehl, Sigbjørn Nedreaas, Kjell Harald |
author_facet |
Hylen, Arvid Jacobsen, Jan Arge Mehl, Sigbjørn Nedreaas, Kjell Harald |
author_sort |
Hylen, Arvid |
title |
Estimates of stock size of cod, haddock, redfish and greenland halibut in the Barents Sea and the Svalbard area, autumn 1987 |
title_short |
Estimates of stock size of cod, haddock, redfish and greenland halibut in the Barents Sea and the Svalbard area, autumn 1987 |
title_full |
Estimates of stock size of cod, haddock, redfish and greenland halibut in the Barents Sea and the Svalbard area, autumn 1987 |
title_fullStr |
Estimates of stock size of cod, haddock, redfish and greenland halibut in the Barents Sea and the Svalbard area, autumn 1987 |
title_full_unstemmed |
Estimates of stock size of cod, haddock, redfish and greenland halibut in the Barents Sea and the Svalbard area, autumn 1987 |
title_sort |
estimates of stock size of cod, haddock, redfish and greenland halibut in the barents sea and the svalbard area, autumn 1987 |
publisher |
ICES |
publishDate |
1988 |
url |
http://hdl.handle.net/11250/104515 |
geographic |
Svalbard Barents Sea Greenland |
geographic_facet |
Svalbard Barents Sea Greenland |
genre |
Barents Sea Barentshav* Greenland Svalbard |
genre_facet |
Barents Sea Barentshav* Greenland Svalbard |
op_source |
26 s. |
op_relation |
ICES CM Documents;1988/G:44 This report is not to be cited without prior reference to the authors http://hdl.handle.net/11250/104515 |
_version_ |
1766368737049444352 |