Retention of Coastal Cod Eggs in a Fjord Caused by Interactions between Egg Buoyancy and Circulation Pattern
Norwegian coastal cod form a stationary population of Atlantic cod Gadus morhua consisting of several genetically separated subpopulations. A small-scale differentiation in marine populations with pelagic eggs and larvae is made possible by local retention of early life stages in coastal environment...
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American Fisheries Society
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Online Access: | https://hdl.handle.net/1956/5755 https://www.tandfonline.com/doi/abs/10.1080/19425120.2011.595258 |
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ftunivbergen:oai:bora.uib.no:1956/5755 2023-05-15T15:27:39+02:00 Retention of Coastal Cod Eggs in a Fjord Caused by Interactions between Egg Buoyancy and Circulation Pattern Myksvoll, Mari Skuggedal Sundby, Svein Ådlandsvik, Bjørn Vikebø, Frode B. 2011-08-01 application/pdf https://hdl.handle.net/1956/5755 https://www.tandfonline.com/doi/abs/10.1080/19425120.2011.595258 eng eng American Fisheries Society Connectivity among subpopulations of Norwegian Coastal cod. Impacts of physical-biological factors during egg stages. urn:issn:1942-5120 https://www.tandfonline.com/doi/abs/10.1080/19425120.2011.595258 https://hdl.handle.net/1956/5755 Copyright American Fisheries Society 2011 VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 Peer reviewed Journal article 2011 ftunivbergen 2023-03-14T17:42:49Z Norwegian coastal cod form a stationary population of Atlantic cod Gadus morhua consisting of several genetically separated subpopulations. A small-scale differentiation in marine populations with pelagic eggs and larvae is made possible by local retention of early life stages in coastal environments. A numerical model was used to simulate the circulation in a fjord system in northern Norway over 2 years with different river runoff patterns. The dispersal of cod eggs was calculated with a particle-tracking model that used three-dimensional currents. The observed thickness of the low-salinity surface layer was well reproduced by the model, but the surface salinity was generally lower in the model than in the observations. The cod eggs attained a subsurface vertical distribution, avoiding the surface and causing retention. Interannual variations in river runoff can cause small changes in the vertical distribution of cod eggs and larger changes in the vertical current structure. Retention in the fjord system was strong in both years, but some eggs were subjected to offshore transport over a limited time period. The timing of offshore transport depended on the precipitation and temperatures in adjacent drainage areas. A possible match between maximized spawning and offshore transport may have a negative effect on local recruitment. publishedVersion Article in Journal/Newspaper atlantic cod Gadus morhua Northern Norway University of Bergen: Bergen Open Research Archive (BORA-UiB) Norway |
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Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 |
spellingShingle |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 Myksvoll, Mari Skuggedal Sundby, Svein Ådlandsvik, Bjørn Vikebø, Frode B. Retention of Coastal Cod Eggs in a Fjord Caused by Interactions between Egg Buoyancy and Circulation Pattern |
topic_facet |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 |
description |
Norwegian coastal cod form a stationary population of Atlantic cod Gadus morhua consisting of several genetically separated subpopulations. A small-scale differentiation in marine populations with pelagic eggs and larvae is made possible by local retention of early life stages in coastal environments. A numerical model was used to simulate the circulation in a fjord system in northern Norway over 2 years with different river runoff patterns. The dispersal of cod eggs was calculated with a particle-tracking model that used three-dimensional currents. The observed thickness of the low-salinity surface layer was well reproduced by the model, but the surface salinity was generally lower in the model than in the observations. The cod eggs attained a subsurface vertical distribution, avoiding the surface and causing retention. Interannual variations in river runoff can cause small changes in the vertical distribution of cod eggs and larger changes in the vertical current structure. Retention in the fjord system was strong in both years, but some eggs were subjected to offshore transport over a limited time period. The timing of offshore transport depended on the precipitation and temperatures in adjacent drainage areas. A possible match between maximized spawning and offshore transport may have a negative effect on local recruitment. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Myksvoll, Mari Skuggedal Sundby, Svein Ådlandsvik, Bjørn Vikebø, Frode B. |
author_facet |
Myksvoll, Mari Skuggedal Sundby, Svein Ådlandsvik, Bjørn Vikebø, Frode B. |
author_sort |
Myksvoll, Mari Skuggedal |
title |
Retention of Coastal Cod Eggs in a Fjord Caused by Interactions between Egg Buoyancy and Circulation Pattern |
title_short |
Retention of Coastal Cod Eggs in a Fjord Caused by Interactions between Egg Buoyancy and Circulation Pattern |
title_full |
Retention of Coastal Cod Eggs in a Fjord Caused by Interactions between Egg Buoyancy and Circulation Pattern |
title_fullStr |
Retention of Coastal Cod Eggs in a Fjord Caused by Interactions between Egg Buoyancy and Circulation Pattern |
title_full_unstemmed |
Retention of Coastal Cod Eggs in a Fjord Caused by Interactions between Egg Buoyancy and Circulation Pattern |
title_sort |
retention of coastal cod eggs in a fjord caused by interactions between egg buoyancy and circulation pattern |
publisher |
American Fisheries Society |
publishDate |
2011 |
url |
https://hdl.handle.net/1956/5755 https://www.tandfonline.com/doi/abs/10.1080/19425120.2011.595258 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
atlantic cod Gadus morhua Northern Norway |
genre_facet |
atlantic cod Gadus morhua Northern Norway |
op_relation |
Connectivity among subpopulations of Norwegian Coastal cod. Impacts of physical-biological factors during egg stages. urn:issn:1942-5120 https://www.tandfonline.com/doi/abs/10.1080/19425120.2011.595258 https://hdl.handle.net/1956/5755 |
op_rights |
Copyright American Fisheries Society 2011 |
_version_ |
1766358066893160448 |