Genomic analysis reveals neutral and adaptive patterns that challenge the current management regime for East Atlantic cod Gadus morhua L
Abstract Challenging long‐held perceptions of fish management units can help to protect vulnerable stocks. When a fishery consisting of multiple genetic stocks is managed as a single unit, overexploitation and depletion of minor genetic units can occur. Atlantic cod ( Gadus morhua ) is an economical...
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crwiley:10.1111/eva.13070 2024-06-02T08:00:08+00:00 Genomic analysis reveals neutral and adaptive patterns that challenge the current management regime for East Atlantic cod Gadus morhua L Johansen, Torild Besnier, François Quintela, María Jorde, Per Erik Glover, Kevin A. Westgaard, Jon‐Ivar Dahle, Geir Lien, Sigbjørn Kent, Matthew P. 2020 http://dx.doi.org/10.1111/eva.13070 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feva.13070 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eva.13070 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/eva.13070 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Evolutionary Applications volume 13, issue 10, page 2673-2688 ISSN 1752-4571 1752-4571 journal-article 2020 crwiley https://doi.org/10.1111/eva.13070 2024-05-03T11:08:10Z Abstract Challenging long‐held perceptions of fish management units can help to protect vulnerable stocks. When a fishery consisting of multiple genetic stocks is managed as a single unit, overexploitation and depletion of minor genetic units can occur. Atlantic cod ( Gadus morhua ) is an economically and ecologically important marine species across the North Atlantic. The application of new genomic resources, including SNP arrays, allows us to detect and explore novel structure within specific cod management units. In Norwegian waters, coastal cod (i.e. those not undertaking extensive migrations) are divided into two arbitrary management units defined by ICES: one between 62° and 70°N (Norwegian coastal cod; NCC) and one between 58° and 62°N (Norwegian coastal south; NCS). Together, these capture a fishery area of >25,000 km 2 containing many spawning grounds. To assess whether these geographic units correctly represent genetic stocks, we analysed spawning cod of NCC and NCS for more than 8,000 SNPs along with samples of Russian White Sea cod, north‐east Arctic cod (NEAC: the largest Atlantic stock), and outgroup samples representing the Irish and Faroe Sea's. Our analyses revealed large differences in spatial patterns of genetic differentiation across the genome and revealed a complex biological structure within NCC and NCS. Haplotype maps from four chromosome sets show regional specific SNP indicating a complex genetic structure. The current management plan dividing the coastal cod into only two management units does not accurately reflect the genetic units and needs to be revised. Coastal cod in Norway, while highly heterogenous, is also genetically distinct from neighbouring stocks in the north (NEAC), west (Faroe Island) and the south. The White Sea cod are highly divergent from other cod, possibly yielding support to the earlier notion of subspecies rank. Article in Journal/Newspaper Arctic cod Arctic atlantic cod Gadus morhua North Atlantic White Sea Wiley Online Library Arctic Norway White Sea Evolutionary Applications 13 10 2673 2688 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Challenging long‐held perceptions of fish management units can help to protect vulnerable stocks. When a fishery consisting of multiple genetic stocks is managed as a single unit, overexploitation and depletion of minor genetic units can occur. Atlantic cod ( Gadus morhua ) is an economically and ecologically important marine species across the North Atlantic. The application of new genomic resources, including SNP arrays, allows us to detect and explore novel structure within specific cod management units. In Norwegian waters, coastal cod (i.e. those not undertaking extensive migrations) are divided into two arbitrary management units defined by ICES: one between 62° and 70°N (Norwegian coastal cod; NCC) and one between 58° and 62°N (Norwegian coastal south; NCS). Together, these capture a fishery area of >25,000 km 2 containing many spawning grounds. To assess whether these geographic units correctly represent genetic stocks, we analysed spawning cod of NCC and NCS for more than 8,000 SNPs along with samples of Russian White Sea cod, north‐east Arctic cod (NEAC: the largest Atlantic stock), and outgroup samples representing the Irish and Faroe Sea's. Our analyses revealed large differences in spatial patterns of genetic differentiation across the genome and revealed a complex biological structure within NCC and NCS. Haplotype maps from four chromosome sets show regional specific SNP indicating a complex genetic structure. The current management plan dividing the coastal cod into only two management units does not accurately reflect the genetic units and needs to be revised. Coastal cod in Norway, while highly heterogenous, is also genetically distinct from neighbouring stocks in the north (NEAC), west (Faroe Island) and the south. The White Sea cod are highly divergent from other cod, possibly yielding support to the earlier notion of subspecies rank. |
format |
Article in Journal/Newspaper |
author |
Johansen, Torild Besnier, François Quintela, María Jorde, Per Erik Glover, Kevin A. Westgaard, Jon‐Ivar Dahle, Geir Lien, Sigbjørn Kent, Matthew P. |
spellingShingle |
Johansen, Torild Besnier, François Quintela, María Jorde, Per Erik Glover, Kevin A. Westgaard, Jon‐Ivar Dahle, Geir Lien, Sigbjørn Kent, Matthew P. Genomic analysis reveals neutral and adaptive patterns that challenge the current management regime for East Atlantic cod Gadus morhua L |
author_facet |
Johansen, Torild Besnier, François Quintela, María Jorde, Per Erik Glover, Kevin A. Westgaard, Jon‐Ivar Dahle, Geir Lien, Sigbjørn Kent, Matthew P. |
author_sort |
Johansen, Torild |
title |
Genomic analysis reveals neutral and adaptive patterns that challenge the current management regime for East Atlantic cod Gadus morhua L |
title_short |
Genomic analysis reveals neutral and adaptive patterns that challenge the current management regime for East Atlantic cod Gadus morhua L |
title_full |
Genomic analysis reveals neutral and adaptive patterns that challenge the current management regime for East Atlantic cod Gadus morhua L |
title_fullStr |
Genomic analysis reveals neutral and adaptive patterns that challenge the current management regime for East Atlantic cod Gadus morhua L |
title_full_unstemmed |
Genomic analysis reveals neutral and adaptive patterns that challenge the current management regime for East Atlantic cod Gadus morhua L |
title_sort |
genomic analysis reveals neutral and adaptive patterns that challenge the current management regime for east atlantic cod gadus morhua l |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/eva.13070 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feva.13070 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eva.13070 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/eva.13070 |
geographic |
Arctic Norway White Sea |
geographic_facet |
Arctic Norway White Sea |
genre |
Arctic cod Arctic atlantic cod Gadus morhua North Atlantic White Sea |
genre_facet |
Arctic cod Arctic atlantic cod Gadus morhua North Atlantic White Sea |
op_source |
Evolutionary Applications volume 13, issue 10, page 2673-2688 ISSN 1752-4571 1752-4571 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/eva.13070 |
container_title |
Evolutionary Applications |
container_volume |
13 |
container_issue |
10 |
container_start_page |
2673 |
op_container_end_page |
2688 |
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1800744141801390080 |