Relationships between spawning ground identity, latitude and early life thermal exposure in Northeast Arctic cod
The Northeast Arctic cod (Gadus morhua), is well known for extensive upstream migrations from its feeding grounds in the Barents Sea to various spawning banks along the Norwegian coast. Prior to the 1990s these banks were located on a wide latitudinal range from Finnmark (~71º N) to Møre (~63º N), o...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.579.8173 2023-05-15T14:30:24+02:00 Relationships between spawning ground identity, latitude and early life thermal exposure in Northeast Arctic cod A. F. Opdal F. B. Vikebø Ø. Fiksen The Pennsylvania State University CiteSeerX Archives 2008 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.579.8173 http://journal.nafo.int/41/opdal/2-opdal.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.579.8173 http://journal.nafo.int/41/opdal/2-opdal.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://journal.nafo.int/41/opdal/2-opdal.pdf text 2008 ftciteseerx 2016-01-08T12:55:51Z The Northeast Arctic cod (Gadus morhua), is well known for extensive upstream migrations from its feeding grounds in the Barents Sea to various spawning banks along the Norwegian coast. Prior to the 1990s these banks were located on a wide latitudinal range from Finnmark (~71º N) to Møre (~63º N), or even to the south-western parts of Norway (~60º N), with the highest densities around Lofoten (~69º N). The migration is energetically costly, but may be profitable if offspring experience warmer water, higher growth rates and lower mortality. To investigate if such a tempera-ture-benefit-hypothesis is plausible, we utilize a regional oceanographic model system (ROMS) and a particle tracking model to trace the drift of particles (virtual cod larvae) released at six important spawning grounds along a north-south gradient. We did this for two years with contrasting oceano-graphic conditions, and we assume the integrated ambient temperature of each particle determines growth potential during the northbound drift. In the model, particles released at the most southerly bank generally do experience significantly higher temperatures than particles released at more north-ern spawning grounds. This is caused by a combination of higher sea-temperatures and higher reten-tion above and around the southern spawning ground. However, particles released at the important Text Arctic cod Arctic Barents Sea Finnmark Gadus morhua Lofoten Northeast Arctic cod Finnmark Unknown Arctic Barents Sea Lofoten Norway |
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Open Polar |
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ftciteseerx |
language |
English |
description |
The Northeast Arctic cod (Gadus morhua), is well known for extensive upstream migrations from its feeding grounds in the Barents Sea to various spawning banks along the Norwegian coast. Prior to the 1990s these banks were located on a wide latitudinal range from Finnmark (~71º N) to Møre (~63º N), or even to the south-western parts of Norway (~60º N), with the highest densities around Lofoten (~69º N). The migration is energetically costly, but may be profitable if offspring experience warmer water, higher growth rates and lower mortality. To investigate if such a tempera-ture-benefit-hypothesis is plausible, we utilize a regional oceanographic model system (ROMS) and a particle tracking model to trace the drift of particles (virtual cod larvae) released at six important spawning grounds along a north-south gradient. We did this for two years with contrasting oceano-graphic conditions, and we assume the integrated ambient temperature of each particle determines growth potential during the northbound drift. In the model, particles released at the most southerly bank generally do experience significantly higher temperatures than particles released at more north-ern spawning grounds. This is caused by a combination of higher sea-temperatures and higher reten-tion above and around the southern spawning ground. However, particles released at the important |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
A. F. Opdal F. B. Vikebø Ø. Fiksen |
spellingShingle |
A. F. Opdal F. B. Vikebø Ø. Fiksen Relationships between spawning ground identity, latitude and early life thermal exposure in Northeast Arctic cod |
author_facet |
A. F. Opdal F. B. Vikebø Ø. Fiksen |
author_sort |
A. F. Opdal |
title |
Relationships between spawning ground identity, latitude and early life thermal exposure in Northeast Arctic cod |
title_short |
Relationships between spawning ground identity, latitude and early life thermal exposure in Northeast Arctic cod |
title_full |
Relationships between spawning ground identity, latitude and early life thermal exposure in Northeast Arctic cod |
title_fullStr |
Relationships between spawning ground identity, latitude and early life thermal exposure in Northeast Arctic cod |
title_full_unstemmed |
Relationships between spawning ground identity, latitude and early life thermal exposure in Northeast Arctic cod |
title_sort |
relationships between spawning ground identity, latitude and early life thermal exposure in northeast arctic cod |
publishDate |
2008 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.579.8173 http://journal.nafo.int/41/opdal/2-opdal.pdf |
geographic |
Arctic Barents Sea Lofoten Norway |
geographic_facet |
Arctic Barents Sea Lofoten Norway |
genre |
Arctic cod Arctic Barents Sea Finnmark Gadus morhua Lofoten Northeast Arctic cod Finnmark |
genre_facet |
Arctic cod Arctic Barents Sea Finnmark Gadus morhua Lofoten Northeast Arctic cod Finnmark |
op_source |
http://journal.nafo.int/41/opdal/2-opdal.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.579.8173 http://journal.nafo.int/41/opdal/2-opdal.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766304244115177472 |