Mixed origin of juvenile Atlantic cod (Gadus morhua) along the Swedish west coast
Cryptic population structure in exploited fishes poses a major challenge for fisheries management. In Atlantic cod, sympatric ecotypes are well-known, for instance off the coast of northern Norway. Recently, two sympatric cod ecotypes have also been documented in the Skagerrak and Kattegat, where ad...
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Language: | English |
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Online Access: | https://hdl.handle.net/11250/3042656 https://doi.org/10.1093/icesjms/fsac220 |
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ftimr:oai:imr.brage.unit.no:11250/3042656 2023-05-15T15:27:08+02:00 Mixed origin of juvenile Atlantic cod (Gadus morhua) along the Swedish west coast Henriksson, Simon Pereyra, Ricardo Sodeland, Marte Ortega-Martinez, Olga Knutsen, Halvor Wennhage, Håkan Andre, Carl 2022 application/pdf https://hdl.handle.net/11250/3042656 https://doi.org/10.1093/icesjms/fsac220 eng eng ICES Journal of Marine Science. 2022, . urn:issn:1054-3139 https://hdl.handle.net/11250/3042656 https://doi.org/10.1093/icesjms/fsac220 cristin:2094090 13 ICES Journal of Marine Science Peer reviewed Journal article 2022 ftimr https://doi.org/10.1093/icesjms/fsac220 2023-01-18T23:43:45Z Cryptic population structure in exploited fishes poses a major challenge for fisheries management. In Atlantic cod, sympatric ecotypes are well-known, for instance off the coast of northern Norway. Recently, two sympatric cod ecotypes have also been documented in the Skagerrak and Kattegat, where adult cod has declined dramatically. One ecotype has an apparent offshore origin and displays a more migratory lifestyle than the other, which is generally resident at the coast throughout its life. To investigate their relative abundances along the Swedish west coast, juvenile cod were collected at high spatial resolution along the coast and genetically assigned to ecotypes. The results reveal large proportions of the coastal ecotype in the southern Kattegat, Öresund, and inshore Swedish Skagerrak, whereas the offshore ecotype dominates in offshore areas. A regression model comparison suggests that differences in bottom depth, rather than distance from the open sea, explain the heterogeneous spatial distribution of the two ecotypes. In addition, the two ecotypes display genetic differences suggesting adaptation to different environments. The results underline that successful fisheries management requires identification and consideration of locally adapted sympatric ecotypes. publishedVersion Article in Journal/Newspaper atlantic cod Gadus morhua Northern Norway Institute for Marine Research: Brage IMR Norway Kattegat ENVELOPE(9.692,9.692,63.563,63.563) ICES Journal of Marine Science 80 1 145 157 |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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ftimr |
language |
English |
description |
Cryptic population structure in exploited fishes poses a major challenge for fisheries management. In Atlantic cod, sympatric ecotypes are well-known, for instance off the coast of northern Norway. Recently, two sympatric cod ecotypes have also been documented in the Skagerrak and Kattegat, where adult cod has declined dramatically. One ecotype has an apparent offshore origin and displays a more migratory lifestyle than the other, which is generally resident at the coast throughout its life. To investigate their relative abundances along the Swedish west coast, juvenile cod were collected at high spatial resolution along the coast and genetically assigned to ecotypes. The results reveal large proportions of the coastal ecotype in the southern Kattegat, Öresund, and inshore Swedish Skagerrak, whereas the offshore ecotype dominates in offshore areas. A regression model comparison suggests that differences in bottom depth, rather than distance from the open sea, explain the heterogeneous spatial distribution of the two ecotypes. In addition, the two ecotypes display genetic differences suggesting adaptation to different environments. The results underline that successful fisheries management requires identification and consideration of locally adapted sympatric ecotypes. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Henriksson, Simon Pereyra, Ricardo Sodeland, Marte Ortega-Martinez, Olga Knutsen, Halvor Wennhage, Håkan Andre, Carl |
spellingShingle |
Henriksson, Simon Pereyra, Ricardo Sodeland, Marte Ortega-Martinez, Olga Knutsen, Halvor Wennhage, Håkan Andre, Carl Mixed origin of juvenile Atlantic cod (Gadus morhua) along the Swedish west coast |
author_facet |
Henriksson, Simon Pereyra, Ricardo Sodeland, Marte Ortega-Martinez, Olga Knutsen, Halvor Wennhage, Håkan Andre, Carl |
author_sort |
Henriksson, Simon |
title |
Mixed origin of juvenile Atlantic cod (Gadus morhua) along the Swedish west coast |
title_short |
Mixed origin of juvenile Atlantic cod (Gadus morhua) along the Swedish west coast |
title_full |
Mixed origin of juvenile Atlantic cod (Gadus morhua) along the Swedish west coast |
title_fullStr |
Mixed origin of juvenile Atlantic cod (Gadus morhua) along the Swedish west coast |
title_full_unstemmed |
Mixed origin of juvenile Atlantic cod (Gadus morhua) along the Swedish west coast |
title_sort |
mixed origin of juvenile atlantic cod (gadus morhua) along the swedish west coast |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3042656 https://doi.org/10.1093/icesjms/fsac220 |
long_lat |
ENVELOPE(9.692,9.692,63.563,63.563) |
geographic |
Norway Kattegat |
geographic_facet |
Norway Kattegat |
genre |
atlantic cod Gadus morhua Northern Norway |
genre_facet |
atlantic cod Gadus morhua Northern Norway |
op_source |
13 ICES Journal of Marine Science |
op_relation |
ICES Journal of Marine Science. 2022, . urn:issn:1054-3139 https://hdl.handle.net/11250/3042656 https://doi.org/10.1093/icesjms/fsac220 cristin:2094090 |
op_doi |
https://doi.org/10.1093/icesjms/fsac220 |
container_title |
ICES Journal of Marine Science |
container_volume |
80 |
container_issue |
1 |
container_start_page |
145 |
op_container_end_page |
157 |
_version_ |
1766357596038496256 |