Estimates of stock size of northeast Arctic cod and haddock, "Sebastes mentella" and "Sebastes marinus" from survey data, winter 1988

An acoustic survey and a bottom trawl survey for cod and haddock were carried out in the Barents Sea during the winter 1988. The fish still had the westerly distribution established in the previous year, but the echo abundance was substantially lower for both cod and haddock. The results of the surv...

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Bibliographic Details
Main Authors: Hylen, Arvid, Jacobsen, Jan Arge, Jakobsen, Tore, Mehl, Sigbjørn, Nedreaas, Kjell Harald, Sunnanå, Knut
Format: Report
Language:English
Published: ICES 1988
Subjects:
arctic cod
arktisk torsk
stock assessment
bestandsberegning
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
Arctic
Barents Sea
Lofoten
Vesterålen
Arctic cod
Arktis*
Northeast Arctic cod
Sebastes mentella
Online Access:http://hdl.handle.net/11250/104513
Description
Summary:An acoustic survey and a bottom trawl survey for cod and haddock were carried out in the Barents Sea during the winter 1988. The fish still had the westerly distribution established in the previous year, but the echo abundance was substantially lower for both cod and haddock. The results of the surveys confirm the declining trend in recruitment. Abundance indices for redfish indicate that the stock situation is stabilizing for Sebastes mentella, but give cause for great concern for the Sebastes marinus stock. An acoustic survey on the spawning grounds of cod in the Lofoten-Vesterålen area was carried out after the Barents Sea survey. The estimate of mature cod was only 37% of the 1987 estimate.

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