Article No. jm980364 Growth of North-east Arctic cod (Gadus morhua L.) in relation
Temperature related changes in horizontal distribution of North-east Arctic cod are described and the influence of temperature on the growth is interpreted. By using data from acoustic and bottom trawl surveys in the Barents Sea conducted in February 1988–1995, mean length at age is related to the w...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.580.1418 2023-05-15T14:30:24+02:00 Article No. jm980364 Growth of North-east Arctic cod (Gadus morhua L.) in relation K. Michalsen G. Ottersen O. Nakken The Pennsylvania State University CiteSeerX Archives 1998 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.580.1418 http://icesjms.oxfordjournals.org/content/55/5/863.full.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.580.1418 http://icesjms.oxfordjournals.org/content/55/5/863.full.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://icesjms.oxfordjournals.org/content/55/5/863.full.pdf text 1998 ftciteseerx 2016-01-08T12:59:02Z Temperature related changes in horizontal distribution of North-east Arctic cod are described and the influence of temperature on the growth is interpreted. By using data from acoustic and bottom trawl surveys in the Barents Sea conducted in February 1988–1995, mean length at age is related to the winter temperature. Mean lengths at age increased with increasing temperature for cod of age 2–6. Mean individual growth was highest for year classes experiencing high temperatures. Due to the seasonal migration patterns of cod, the actual annual means of ambient temperature as well as the diVerences between these means are lower than the values from February alone, used in this study. Thus, by using the ambient winter temperature instead of annual mean values the eVect temperature has on growth is probably underestimated. Increased abundance of young cod is associated with an extension of the distribution area towards east and north into colder water. Even though the individual consump-tion of capelin by cod increased in these years, the increase in abundance was accompanied by reduced growth. Hence a growth–temperature relation may wrongly be interpreted as a growth–density (abundance) dependency if ambient temperature is not included in the analysis. Text Arctic cod Arctic Barents Sea Gadus morhua Unknown Arctic Barents Sea |
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Open Polar |
collection |
Unknown |
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ftciteseerx |
language |
English |
description |
Temperature related changes in horizontal distribution of North-east Arctic cod are described and the influence of temperature on the growth is interpreted. By using data from acoustic and bottom trawl surveys in the Barents Sea conducted in February 1988–1995, mean length at age is related to the winter temperature. Mean lengths at age increased with increasing temperature for cod of age 2–6. Mean individual growth was highest for year classes experiencing high temperatures. Due to the seasonal migration patterns of cod, the actual annual means of ambient temperature as well as the diVerences between these means are lower than the values from February alone, used in this study. Thus, by using the ambient winter temperature instead of annual mean values the eVect temperature has on growth is probably underestimated. Increased abundance of young cod is associated with an extension of the distribution area towards east and north into colder water. Even though the individual consump-tion of capelin by cod increased in these years, the increase in abundance was accompanied by reduced growth. Hence a growth–temperature relation may wrongly be interpreted as a growth–density (abundance) dependency if ambient temperature is not included in the analysis. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
K. Michalsen G. Ottersen O. Nakken |
spellingShingle |
K. Michalsen G. Ottersen O. Nakken Article No. jm980364 Growth of North-east Arctic cod (Gadus morhua L.) in relation |
author_facet |
K. Michalsen G. Ottersen O. Nakken |
author_sort |
K. Michalsen |
title |
Article No. jm980364 Growth of North-east Arctic cod (Gadus morhua L.) in relation |
title_short |
Article No. jm980364 Growth of North-east Arctic cod (Gadus morhua L.) in relation |
title_full |
Article No. jm980364 Growth of North-east Arctic cod (Gadus morhua L.) in relation |
title_fullStr |
Article No. jm980364 Growth of North-east Arctic cod (Gadus morhua L.) in relation |
title_full_unstemmed |
Article No. jm980364 Growth of North-east Arctic cod (Gadus morhua L.) in relation |
title_sort |
article no. jm980364 growth of north-east arctic cod (gadus morhua l.) in relation |
publishDate |
1998 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.580.1418 http://icesjms.oxfordjournals.org/content/55/5/863.full.pdf |
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 |
http://icesjms.oxfordjournals.org/content/55/5/863.full.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.580.1418 http://icesjms.oxfordjournals.org/content/55/5/863.full.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766304241311285248 |