On the geographical distribution of arctic cod in relation to the distribution of bottom temperatures in the Barents Sea, 1977-1984
The results from acoustic-trawl surveys in January-March were analysed together with observations of bottom temperatures at the same cruises. Distributions of fish abundance for each age group of cod on temperature were established. The analysis showed that the older age groups, fish aged 6 and 7 ye...
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ftimr:oai:imr.brage.unit.no:11250/100269 2023-05-15T14:30:26+02:00 On the geographical distribution of arctic cod in relation to the distribution of bottom temperatures in the Barents Sea, 1977-1984 Nakken, Odd Raknes, Askjell 1984 751238 bytes application/pdf http://hdl.handle.net/11250/100269 eng eng ICES ICES CM documents 1984/GM 20 Minisymposium This report is not to be quoted without prior consultation with the General Secretary. http://hdl.handle.net/11250/100269 17 s. VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 Working paper 1984 ftimr 2021-09-23T20:15:19Z The results from acoustic-trawl surveys in January-March were analysed together with observations of bottom temperatures at the same cruises. Distributions of fish abundance for each age group of cod on temperature were established. The analysis showed that the older age groups, fish aged 6 and 7 years, were consistently found in warmer waters, i.e. further to the west, than the younger fish, aged 1-3 years. The variations from year to year in bottom temperatures of the distribution areas appeared to be largest for the youngest fish, the l year olds, and considerably larger than the corresponding temperature variations in two fixed reference areas. The mean lengths at age 4, 5 and 6 years were observed to increase significantly for the yearclasses 1975-1980 and this increased growth coincided with an increase in mean temperature of the distribution areas of the fish. Report Arctic cod Arctic Barents Sea Institute for Marine Research: Brage IMR Arctic Barents Sea |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
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 Nakken, Odd Raknes, Askjell On the geographical distribution of arctic cod in relation to the distribution of bottom temperatures in the Barents Sea, 1977-1984 |
topic_facet |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 |
description |
The results from acoustic-trawl surveys in January-March were analysed together with observations of bottom temperatures at the same cruises. Distributions of fish abundance for each age group of cod on temperature were established. The analysis showed that the older age groups, fish aged 6 and 7 years, were consistently found in warmer waters, i.e. further to the west, than the younger fish, aged 1-3 years. The variations from year to year in bottom temperatures of the distribution areas appeared to be largest for the youngest fish, the l year olds, and considerably larger than the corresponding temperature variations in two fixed reference areas. The mean lengths at age 4, 5 and 6 years were observed to increase significantly for the yearclasses 1975-1980 and this increased growth coincided with an increase in mean temperature of the distribution areas of the fish. |
format |
Report |
author |
Nakken, Odd Raknes, Askjell |
author_facet |
Nakken, Odd Raknes, Askjell |
author_sort |
Nakken, Odd |
title |
On the geographical distribution of arctic cod in relation to the distribution of bottom temperatures in the Barents Sea, 1977-1984 |
title_short |
On the geographical distribution of arctic cod in relation to the distribution of bottom temperatures in the Barents Sea, 1977-1984 |
title_full |
On the geographical distribution of arctic cod in relation to the distribution of bottom temperatures in the Barents Sea, 1977-1984 |
title_fullStr |
On the geographical distribution of arctic cod in relation to the distribution of bottom temperatures in the Barents Sea, 1977-1984 |
title_full_unstemmed |
On the geographical distribution of arctic cod in relation to the distribution of bottom temperatures in the Barents Sea, 1977-1984 |
title_sort |
on the geographical distribution of arctic cod in relation to the distribution of bottom temperatures in the barents sea, 1977-1984 |
publisher |
ICES |
publishDate |
1984 |
url |
http://hdl.handle.net/11250/100269 |
geographic |
Arctic Barents Sea |
geographic_facet |
Arctic Barents Sea |
genre |
Arctic cod Arctic Barents Sea |
genre_facet |
Arctic cod Arctic Barents Sea |
op_source |
17 s. |
op_relation |
ICES CM documents 1984/GM 20 Minisymposium This report is not to be quoted without prior consultation with the General Secretary. http://hdl.handle.net/11250/100269 |
_version_ |
1766304287912099840 |