Fecundity and growth of Atlantic cod (Gadus morhua L.) along a latitudinal gradient
Journal homepage: http://www.elsevier.com/wps/find/journaldescription.cws_home/503309/description#description Some fish species have wide distribution areas that span very different habitats. In this investigation we have studied Atlantic cod (Gadus morhua), which is an example of such a species, to...
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Online Access: | http://hdl.handle.net/11250/108484 https://doi.org/10.1016/j.fishres.2010.03.020 |
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ftimr:oai:imr.brage.unit.no:11250/108484 2023-05-15T15:27:04+02:00 Fecundity and growth of Atlantic cod (Gadus morhua L.) along a latitudinal gradient Thorsen, Anders Witthames, Peter R. Marteinsdottir, Gudrun Nash, Richard D.M. Kjesbu, Olav Sigurd 2010-05 application/pdf http://hdl.handle.net/11250/108484 https://doi.org/10.1016/j.fishres.2010.03.020 eng eng Elsevier urn:issn:0165-7836 http://hdl.handle.net/11250/108484 http://dx.doi.org/10.1016/j.fishres.2010.03.020 45-55 104 Fisheries Research 1-3 atlantic cod atlantisk torsk fecundity fertilitet temperature temperatur VDP::Agriculture and fishery disciplines: 900::Agriculture disciplines: 910::Livestock breeding rearing reproduction: 912 Journal article Peer reviewed 2010 ftimr https://doi.org/10.1016/j.fishres.2010.03.020 2021-09-23T20:14:21Z Journal homepage: http://www.elsevier.com/wps/find/journaldescription.cws_home/503309/description#description Some fish species have wide distribution areas that span very different habitats. In this investigation we have studied Atlantic cod (Gadus morhua), which is an example of such a species, to demonstrate how this may have caused adaptations to key features such as fecundity, growth and age and size at first spawning. We have studied cod from the Barents Sea, Icelandic waters, North Sea and Irish Sea. The ovary sampling was undertaken over several years, however, not always sequentially, in order to assess whether the relationships between fecundity and other key features were constant or variable. Also, we compared historical maturity ogives and growth from the different regions. There was a clear pattern with fish maturing at a greater age and size in the north compared to the south. For three of the four cod stocks we demonstrated a significant reduction in relative potential fecundity as maturity progressed towards spawning, i.e., as the mean diameter of vitellogenic follicles increased. To be able to compare potential fecundity in a standardised way both in time and space, we constructed models that included mean diameter as one of the independent variables. Our potential fecundity comparisons clearly indicated a north-south gradient with increasing size-specific fecundity towards the south. The higher fecundity of the fish in the south could only partly be explained by the higher condition and temperature that was observed in these waters. Article in Journal/Newspaper atlantic cod Barents Sea Gadus morhua Institute for Marine Research: Brage IMR Barents Sea Fisheries Research 104 1-3 45 55 |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
topic |
atlantic cod atlantisk torsk fecundity fertilitet temperature temperatur VDP::Agriculture and fishery disciplines: 900::Agriculture disciplines: 910::Livestock breeding rearing reproduction: 912 |
spellingShingle |
atlantic cod atlantisk torsk fecundity fertilitet temperature temperatur VDP::Agriculture and fishery disciplines: 900::Agriculture disciplines: 910::Livestock breeding rearing reproduction: 912 Thorsen, Anders Witthames, Peter R. Marteinsdottir, Gudrun Nash, Richard D.M. Kjesbu, Olav Sigurd Fecundity and growth of Atlantic cod (Gadus morhua L.) along a latitudinal gradient |
topic_facet |
atlantic cod atlantisk torsk fecundity fertilitet temperature temperatur VDP::Agriculture and fishery disciplines: 900::Agriculture disciplines: 910::Livestock breeding rearing reproduction: 912 |
description |
Journal homepage: http://www.elsevier.com/wps/find/journaldescription.cws_home/503309/description#description Some fish species have wide distribution areas that span very different habitats. In this investigation we have studied Atlantic cod (Gadus morhua), which is an example of such a species, to demonstrate how this may have caused adaptations to key features such as fecundity, growth and age and size at first spawning. We have studied cod from the Barents Sea, Icelandic waters, North Sea and Irish Sea. The ovary sampling was undertaken over several years, however, not always sequentially, in order to assess whether the relationships between fecundity and other key features were constant or variable. Also, we compared historical maturity ogives and growth from the different regions. There was a clear pattern with fish maturing at a greater age and size in the north compared to the south. For three of the four cod stocks we demonstrated a significant reduction in relative potential fecundity as maturity progressed towards spawning, i.e., as the mean diameter of vitellogenic follicles increased. To be able to compare potential fecundity in a standardised way both in time and space, we constructed models that included mean diameter as one of the independent variables. Our potential fecundity comparisons clearly indicated a north-south gradient with increasing size-specific fecundity towards the south. The higher fecundity of the fish in the south could only partly be explained by the higher condition and temperature that was observed in these waters. |
format |
Article in Journal/Newspaper |
author |
Thorsen, Anders Witthames, Peter R. Marteinsdottir, Gudrun Nash, Richard D.M. Kjesbu, Olav Sigurd |
author_facet |
Thorsen, Anders Witthames, Peter R. Marteinsdottir, Gudrun Nash, Richard D.M. Kjesbu, Olav Sigurd |
author_sort |
Thorsen, Anders |
title |
Fecundity and growth of Atlantic cod (Gadus morhua L.) along a latitudinal gradient |
title_short |
Fecundity and growth of Atlantic cod (Gadus morhua L.) along a latitudinal gradient |
title_full |
Fecundity and growth of Atlantic cod (Gadus morhua L.) along a latitudinal gradient |
title_fullStr |
Fecundity and growth of Atlantic cod (Gadus morhua L.) along a latitudinal gradient |
title_full_unstemmed |
Fecundity and growth of Atlantic cod (Gadus morhua L.) along a latitudinal gradient |
title_sort |
fecundity and growth of atlantic cod (gadus morhua l.) along a latitudinal gradient |
publisher |
Elsevier |
publishDate |
2010 |
url |
http://hdl.handle.net/11250/108484 https://doi.org/10.1016/j.fishres.2010.03.020 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
atlantic cod Barents Sea Gadus morhua |
genre_facet |
atlantic cod Barents Sea Gadus morhua |
op_source |
45-55 104 Fisheries Research 1-3 |
op_relation |
urn:issn:0165-7836 http://hdl.handle.net/11250/108484 http://dx.doi.org/10.1016/j.fishres.2010.03.020 |
op_doi |
https://doi.org/10.1016/j.fishres.2010.03.020 |
container_title |
Fisheries Research |
container_volume |
104 |
container_issue |
1-3 |
container_start_page |
45 |
op_container_end_page |
55 |
_version_ |
1766357533275979776 |