Ambient temperature and distribution of north-east Arctic cod
Many studies on the effects of temperature on fish distribution and population parameters have considered the temperature and its variability at fixed stations or sections rather than the ambient temperature actually surrounding the fish. In the present paper ambient winter temperature was estimated...
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Oxford University Press
1998
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fthighwire:oai:open-archive.highwire.org:icesjms:55/1/67 2023-05-15T14:30:24+02:00 Ambient temperature and distribution of north-east Arctic cod Ottersen, Geir Michalsen, Kathrine Nakken, Odd 1998-02-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/55/1/67 https://doi.org/10.1006/jmsc.1997.0232 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/55/1/67 http://dx.doi.org/10.1006/jmsc.1997.0232 Copyright (C) 1998, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Articles TEXT 1998 fthighwire https://doi.org/10.1006/jmsc.1997.0232 2013-05-27T06:02:50Z Many studies on the effects of temperature on fish distribution and population parameters have considered the temperature and its variability at fixed stations or sections rather than the ambient temperature actually surrounding the fish. In the present paper ambient winter temperature was estimated for 1–7 year-old north-east Arctic cod in the period 1988–1995 from spatial distributions of fish density and temperature. Four different estimates were calculated for each age and year based on fish density observations from acoustic and bottom-trawl surveys and temperature recordings at the bottom, as well as averaged from 100 m depth to bottom. The estimates of ambient temperature were compared with each other and with temperature series in fixed areas and a standard section, the Kola meridian. The inter-annual variability in ambient winter temperature was found to be larger than in the Kola section series. Older fish were found at higher temperatures. For the younger age groups the range extended eastwards when numbers were high. This could explain the observed decrease of mean ambient temperatures in which cod were found during a relatively warm period in the Barents Sea. The mean ambient temperatures are also compared with the temperatures used for calculations of consumption rate by cod in the ICES Working groups. Text Arctic cod Arctic Barents Sea HighWire Press (Stanford University) Arctic Barents Sea ICES Journal of Marine Science 55 1 67 85 |
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HighWire Press (Stanford University) |
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English |
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Articles |
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Articles Ottersen, Geir Michalsen, Kathrine Nakken, Odd Ambient temperature and distribution of north-east Arctic cod |
topic_facet |
Articles |
description |
Many studies on the effects of temperature on fish distribution and population parameters have considered the temperature and its variability at fixed stations or sections rather than the ambient temperature actually surrounding the fish. In the present paper ambient winter temperature was estimated for 1–7 year-old north-east Arctic cod in the period 1988–1995 from spatial distributions of fish density and temperature. Four different estimates were calculated for each age and year based on fish density observations from acoustic and bottom-trawl surveys and temperature recordings at the bottom, as well as averaged from 100 m depth to bottom. The estimates of ambient temperature were compared with each other and with temperature series in fixed areas and a standard section, the Kola meridian. The inter-annual variability in ambient winter temperature was found to be larger than in the Kola section series. Older fish were found at higher temperatures. For the younger age groups the range extended eastwards when numbers were high. This could explain the observed decrease of mean ambient temperatures in which cod were found during a relatively warm period in the Barents Sea. The mean ambient temperatures are also compared with the temperatures used for calculations of consumption rate by cod in the ICES Working groups. |
format |
Text |
author |
Ottersen, Geir Michalsen, Kathrine Nakken, Odd |
author_facet |
Ottersen, Geir Michalsen, Kathrine Nakken, Odd |
author_sort |
Ottersen, Geir |
title |
Ambient temperature and distribution of north-east Arctic cod |
title_short |
Ambient temperature and distribution of north-east Arctic cod |
title_full |
Ambient temperature and distribution of north-east Arctic cod |
title_fullStr |
Ambient temperature and distribution of north-east Arctic cod |
title_full_unstemmed |
Ambient temperature and distribution of north-east Arctic cod |
title_sort |
ambient temperature and distribution of north-east arctic cod |
publisher |
Oxford University Press |
publishDate |
1998 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/55/1/67 https://doi.org/10.1006/jmsc.1997.0232 |
geographic |
Arctic Barents Sea |
geographic_facet |
Arctic Barents Sea |
genre |
Arctic cod Arctic Barents Sea |
genre_facet |
Arctic cod Arctic Barents Sea |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/55/1/67 http://dx.doi.org/10.1006/jmsc.1997.0232 |
op_rights |
Copyright (C) 1998, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
op_doi |
https://doi.org/10.1006/jmsc.1997.0232 |
container_title |
ICES Journal of Marine Science |
container_volume |
55 |
container_issue |
1 |
container_start_page |
67 |
op_container_end_page |
85 |
_version_ |
1766304246213378048 |