Shelf recruitment of Calanus finmarchicus off the west coast of Norway: role of physical processes and timing of diapause termination
The copepod Calanus finmarchicus is an important part of the Norwegian Sea ecosystem because of its dominating abundance and importance as prey for fish larvae and adult planktivorous fish. The abundance of C. finmarchicus on the Norwegian shelf is generally low in winter, whereas in spring the shel...
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2009
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Online Access: | http://hdl.handle.net/11250/108621 https://doi.org/10.3354/meps08060 |
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ftimr:oai:imr.brage.unit.no:11250/108621 2024-09-15T18:00:40+00:00 Shelf recruitment of Calanus finmarchicus off the west coast of Norway: role of physical processes and timing of diapause termination Samuelsen, Annette Huse, Geir Hansen, Cecilie 2009-07-02 application/pdf http://hdl.handle.net/11250/108621 https://doi.org/10.3354/meps08060 eng eng Inter-Research urn:issn:0171-8630 urn:issn:1616-1599 http://hdl.handle.net/11250/108621 http://dx.doi.org/10.3354/meps08060 163-180 386 Marine Ecology Progress Series Norwegian Sea Norskehavet copepods raudåte VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922 Journal article Peer reviewed 2009 ftimr https://doi.org/10.3354/meps08060 2024-07-31T03:37:25Z The copepod Calanus finmarchicus is an important part of the Norwegian Sea ecosystem because of its dominating abundance and importance as prey for fish larvae and adult planktivorous fish. The abundance of C. finmarchicus on the Norwegian shelf is generally low in winter, whereas in spring the shelf is replenished by individuals that overwinter at depth, either in fjords or in the deep basins of the Norwegian Sea. In the present study shelf recruitment is investigated using an individual-based model for C. finmarchicus coupled to the HYbrid Coordinate Ocean Model and a biophysical model. The model was set up on a nested grid along the west coast of Norway and used to study the shelf recruitment originating from the Norwegian Sea. We investigate the effect of wind, currents and the timing of Calanus ascent on the shelf abundance of C. finmarchicus. The most important findings are the following: (1) periods of large on-shelf transport are connected with strong westerly winds associated with passing low-pressure systems; (2) the transport of overwintering adults onto the shelf determines the total shelf abundance prior to mid-summer; (3) the early spring bloom on the shelf causes increased shelf population of C. finmarchicus in the spring and throughout the summer compared to the areas further off-shore; and (4) the entry routes taken by C. finmarchicus are related to bathymetry; in particular, the deep trenches around Halten Bank and the Norwegian trench are favoured places to enter the Norwegian shelf. 2014-07-02 Article in Journal/Newspaper Calanus finmarchicus Norskehav* Norwegian Sea Raudåte Copepods Institute for Marine Research: Brage IMR Marine Ecology Progress Series 386 163 180 |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
topic |
Norwegian Sea Norskehavet copepods raudåte VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922 |
spellingShingle |
Norwegian Sea Norskehavet copepods raudåte VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922 Samuelsen, Annette Huse, Geir Hansen, Cecilie Shelf recruitment of Calanus finmarchicus off the west coast of Norway: role of physical processes and timing of diapause termination |
topic_facet |
Norwegian Sea Norskehavet copepods raudåte VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922 |
description |
The copepod Calanus finmarchicus is an important part of the Norwegian Sea ecosystem because of its dominating abundance and importance as prey for fish larvae and adult planktivorous fish. The abundance of C. finmarchicus on the Norwegian shelf is generally low in winter, whereas in spring the shelf is replenished by individuals that overwinter at depth, either in fjords or in the deep basins of the Norwegian Sea. In the present study shelf recruitment is investigated using an individual-based model for C. finmarchicus coupled to the HYbrid Coordinate Ocean Model and a biophysical model. The model was set up on a nested grid along the west coast of Norway and used to study the shelf recruitment originating from the Norwegian Sea. We investigate the effect of wind, currents and the timing of Calanus ascent on the shelf abundance of C. finmarchicus. The most important findings are the following: (1) periods of large on-shelf transport are connected with strong westerly winds associated with passing low-pressure systems; (2) the transport of overwintering adults onto the shelf determines the total shelf abundance prior to mid-summer; (3) the early spring bloom on the shelf causes increased shelf population of C. finmarchicus in the spring and throughout the summer compared to the areas further off-shore; and (4) the entry routes taken by C. finmarchicus are related to bathymetry; in particular, the deep trenches around Halten Bank and the Norwegian trench are favoured places to enter the Norwegian shelf. 2014-07-02 |
format |
Article in Journal/Newspaper |
author |
Samuelsen, Annette Huse, Geir Hansen, Cecilie |
author_facet |
Samuelsen, Annette Huse, Geir Hansen, Cecilie |
author_sort |
Samuelsen, Annette |
title |
Shelf recruitment of Calanus finmarchicus off the west coast of Norway: role of physical processes and timing of diapause termination |
title_short |
Shelf recruitment of Calanus finmarchicus off the west coast of Norway: role of physical processes and timing of diapause termination |
title_full |
Shelf recruitment of Calanus finmarchicus off the west coast of Norway: role of physical processes and timing of diapause termination |
title_fullStr |
Shelf recruitment of Calanus finmarchicus off the west coast of Norway: role of physical processes and timing of diapause termination |
title_full_unstemmed |
Shelf recruitment of Calanus finmarchicus off the west coast of Norway: role of physical processes and timing of diapause termination |
title_sort |
shelf recruitment of calanus finmarchicus off the west coast of norway: role of physical processes and timing of diapause termination |
publisher |
Inter-Research |
publishDate |
2009 |
url |
http://hdl.handle.net/11250/108621 https://doi.org/10.3354/meps08060 |
genre |
Calanus finmarchicus Norskehav* Norwegian Sea Raudåte Copepods |
genre_facet |
Calanus finmarchicus Norskehav* Norwegian Sea Raudåte Copepods |
op_source |
163-180 386 Marine Ecology Progress Series |
op_relation |
urn:issn:0171-8630 urn:issn:1616-1599 http://hdl.handle.net/11250/108621 http://dx.doi.org/10.3354/meps08060 |
op_doi |
https://doi.org/10.3354/meps08060 |
container_title |
Marine Ecology Progress Series |
container_volume |
386 |
container_start_page |
163 |
op_container_end_page |
180 |
_version_ |
1810437844919910400 |