Diet overlap between North-East Arctic cod and haddock in the southern part of the Barents Sea in 1984-1986
The diet composition of North-East Arctic cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) are examined from stomach content data. Fish were collected in the southern part of the Barents Sea from 1984 to 1986. A total of 4790 cods and 1361 haddocks were divided according to season (winter,...
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ftimr:oai:imr.brage.unit.no:11250/100251 2023-05-15T14:30:21+02:00 Diet overlap between North-East Arctic cod and haddock in the southern part of the Barents Sea in 1984-1986 Burgos, Guillermo Mehl, Sigbjørn 1987 887044 bytes application/pdf http://hdl.handle.net/11250/100251 eng eng ICES CM documents 1987/G:50 http://hdl.handle.net/11250/100251 22 s. VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 Working paper 1987 ftimr 2021-09-23T20:15:23Z The diet composition of North-East Arctic cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) are examined from stomach content data. Fish were collected in the southern part of the Barents Sea from 1984 to 1986. A total of 4790 cods and 1361 haddocks were divided according to season (winter, spring and fall) and fish size in 10 cm size classes. Only fish bigger than 10 cm length were considered. Diet overlap between the two species for each size group in each season was calculated using the Schoener's index. North-East Arctic cod show a size dependent shift in the diet. Fish smaller than 20 cm prey mainly on crustaceans (euphauiids, deep sea shrimp and amphipods). Above 20 cm, cod incorporate fish in the diet to a larger degree, the degree increasing with the size of the predator. Some seasonal changes are described. Haddock, a less ichthiophagous, bivalves and polychaetes. In general the diet overlap is low except in spring and fall when the smaller size groups of both species prey on euphausiids. The results are compared with previous information on cod-haddock interaction. Report Arctic cod Arctic Barents Sea Gadus morhua Institute for Marine Research: Brage IMR Arctic Barents Sea |
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Open Polar |
collection |
Institute for Marine Research: Brage IMR |
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ftimr |
language |
English |
topic |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 |
spellingShingle |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 Burgos, Guillermo Mehl, Sigbjørn Diet overlap between North-East Arctic cod and haddock in the southern part of the Barents Sea in 1984-1986 |
topic_facet |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 |
description |
The diet composition of North-East Arctic cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) are examined from stomach content data. Fish were collected in the southern part of the Barents Sea from 1984 to 1986. A total of 4790 cods and 1361 haddocks were divided according to season (winter, spring and fall) and fish size in 10 cm size classes. Only fish bigger than 10 cm length were considered. Diet overlap between the two species for each size group in each season was calculated using the Schoener's index. North-East Arctic cod show a size dependent shift in the diet. Fish smaller than 20 cm prey mainly on crustaceans (euphauiids, deep sea shrimp and amphipods). Above 20 cm, cod incorporate fish in the diet to a larger degree, the degree increasing with the size of the predator. Some seasonal changes are described. Haddock, a less ichthiophagous, bivalves and polychaetes. In general the diet overlap is low except in spring and fall when the smaller size groups of both species prey on euphausiids. The results are compared with previous information on cod-haddock interaction. |
format |
Report |
author |
Burgos, Guillermo Mehl, Sigbjørn |
author_facet |
Burgos, Guillermo Mehl, Sigbjørn |
author_sort |
Burgos, Guillermo |
title |
Diet overlap between North-East Arctic cod and haddock in the southern part of the Barents Sea in 1984-1986 |
title_short |
Diet overlap between North-East Arctic cod and haddock in the southern part of the Barents Sea in 1984-1986 |
title_full |
Diet overlap between North-East Arctic cod and haddock in the southern part of the Barents Sea in 1984-1986 |
title_fullStr |
Diet overlap between North-East Arctic cod and haddock in the southern part of the Barents Sea in 1984-1986 |
title_full_unstemmed |
Diet overlap between North-East Arctic cod and haddock in the southern part of the Barents Sea in 1984-1986 |
title_sort |
diet overlap between north-east arctic cod and haddock in the southern part of the barents sea in 1984-1986 |
publishDate |
1987 |
url |
http://hdl.handle.net/11250/100251 |
geographic |
Arctic Barents Sea |
geographic_facet |
Arctic Barents Sea |
genre |
Arctic cod Arctic Barents Sea Gadus morhua |
genre_facet |
Arctic cod Arctic Barents Sea Gadus morhua |
op_source |
22 s. |
op_relation |
ICES CM documents 1987/G:50 http://hdl.handle.net/11250/100251 |
_version_ |
1766304210021777408 |