Genetic stock identification reveals greater use of an oceanic feeding ground around the Faroe Islands by multi-sea winter Atlantic salmon, with variation in use across reporting groups
Abstract While it is known that the oceans around the Faroe Islands support an Atlantic salmon (Salmo salar) feeding ground, the relative use of this resource by different age classes and populations remains largely unexplored. Using genetic stock identification and run–reconstruction modelling, we...
Published in: | ICES Journal of Marine Science |
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Oxford University Press (OUP)
2022
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsac182 https://academic.oup.com/icesjms/article-pdf/79/9/2442/47265123/fsac182.pdf |
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croxfordunivpr:10.1093/icesjms/fsac182 2024-06-23T07:51:19+00:00 Genetic stock identification reveals greater use of an oceanic feeding ground around the Faroe Islands by multi-sea winter Atlantic salmon, with variation in use across reporting groups O'Sullivan, Ronan James Ozerov, Mikhail Bolstad, Geir H Gilbey, John Jacobsen, Jan Arge Erkinaro, Jaakko Rikardsen, Audun H Hindar, Kjetil Aykanat, Tutku Grant, W Stewart University of Helsinki Academy of Finland Norwegian Research Council 2022 http://dx.doi.org/10.1093/icesjms/fsac182 https://academic.oup.com/icesjms/article-pdf/79/9/2442/47265123/fsac182.pdf en eng Oxford University Press (OUP) https://creativecommons.org/licenses/by/4.0/ ICES Journal of Marine Science volume 79, issue 9, page 2442-2452 ISSN 1054-3139 1095-9289 journal-article 2022 croxfordunivpr https://doi.org/10.1093/icesjms/fsac182 2024-06-11T04:21:26Z Abstract While it is known that the oceans around the Faroe Islands support an Atlantic salmon (Salmo salar) feeding ground, the relative use of this resource by different age classes and populations remains largely unexplored. Using genetic stock identification and run–reconstruction modelling, we observed a consistent pattern whereby the proportion of multi-sea winter salmon (MSW—fish that have spent multiple winters at sea) for a reporting group was substantially greater around the Faroes than the MSW proportion among that group’s corresponding pre-fisheries abundance. Surprisingly, MSW fish from Ireland and the United Kingdom were as likely to occur around the Faroes as were MSW fish from more north-eastern regions. While 1SW salmon (single sea-winter fish) from Ireland and the United Kingdom as well as Southern Norway occurred in similar proportions around the Faroes, 1SW fish from the north-eastern regions were virtually absent. Our results indicate that the oceans around the Faroes host a predominantly MSW feeding ground and use of this resource varies across age classes and reporting groups. Furthermore, these results suggest that MSW fish from some reporting groups preferentially migrate to the Faroes. Variation in spatial resource use may help buffer salmon populations against localized negative changes in marine conditions via portfolio effects. Article in Journal/Newspaper Atlantic salmon Faroe Islands Faroes Salmo salar Oxford University Press Faroe Islands Norway ICES Journal of Marine Science 79 9 2442 2452 |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
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English |
description |
Abstract While it is known that the oceans around the Faroe Islands support an Atlantic salmon (Salmo salar) feeding ground, the relative use of this resource by different age classes and populations remains largely unexplored. Using genetic stock identification and run–reconstruction modelling, we observed a consistent pattern whereby the proportion of multi-sea winter salmon (MSW—fish that have spent multiple winters at sea) for a reporting group was substantially greater around the Faroes than the MSW proportion among that group’s corresponding pre-fisheries abundance. Surprisingly, MSW fish from Ireland and the United Kingdom were as likely to occur around the Faroes as were MSW fish from more north-eastern regions. While 1SW salmon (single sea-winter fish) from Ireland and the United Kingdom as well as Southern Norway occurred in similar proportions around the Faroes, 1SW fish from the north-eastern regions were virtually absent. Our results indicate that the oceans around the Faroes host a predominantly MSW feeding ground and use of this resource varies across age classes and reporting groups. Furthermore, these results suggest that MSW fish from some reporting groups preferentially migrate to the Faroes. Variation in spatial resource use may help buffer salmon populations against localized negative changes in marine conditions via portfolio effects. |
author2 |
Grant, W Stewart University of Helsinki Academy of Finland Norwegian Research Council |
format |
Article in Journal/Newspaper |
author |
O'Sullivan, Ronan James Ozerov, Mikhail Bolstad, Geir H Gilbey, John Jacobsen, Jan Arge Erkinaro, Jaakko Rikardsen, Audun H Hindar, Kjetil Aykanat, Tutku |
spellingShingle |
O'Sullivan, Ronan James Ozerov, Mikhail Bolstad, Geir H Gilbey, John Jacobsen, Jan Arge Erkinaro, Jaakko Rikardsen, Audun H Hindar, Kjetil Aykanat, Tutku Genetic stock identification reveals greater use of an oceanic feeding ground around the Faroe Islands by multi-sea winter Atlantic salmon, with variation in use across reporting groups |
author_facet |
O'Sullivan, Ronan James Ozerov, Mikhail Bolstad, Geir H Gilbey, John Jacobsen, Jan Arge Erkinaro, Jaakko Rikardsen, Audun H Hindar, Kjetil Aykanat, Tutku |
author_sort |
O'Sullivan, Ronan James |
title |
Genetic stock identification reveals greater use of an oceanic feeding ground around the Faroe Islands by multi-sea winter Atlantic salmon, with variation in use across reporting groups |
title_short |
Genetic stock identification reveals greater use of an oceanic feeding ground around the Faroe Islands by multi-sea winter Atlantic salmon, with variation in use across reporting groups |
title_full |
Genetic stock identification reveals greater use of an oceanic feeding ground around the Faroe Islands by multi-sea winter Atlantic salmon, with variation in use across reporting groups |
title_fullStr |
Genetic stock identification reveals greater use of an oceanic feeding ground around the Faroe Islands by multi-sea winter Atlantic salmon, with variation in use across reporting groups |
title_full_unstemmed |
Genetic stock identification reveals greater use of an oceanic feeding ground around the Faroe Islands by multi-sea winter Atlantic salmon, with variation in use across reporting groups |
title_sort |
genetic stock identification reveals greater use of an oceanic feeding ground around the faroe islands by multi-sea winter atlantic salmon, with variation in use across reporting groups |
publisher |
Oxford University Press (OUP) |
publishDate |
2022 |
url |
http://dx.doi.org/10.1093/icesjms/fsac182 https://academic.oup.com/icesjms/article-pdf/79/9/2442/47265123/fsac182.pdf |
geographic |
Faroe Islands Norway |
geographic_facet |
Faroe Islands Norway |
genre |
Atlantic salmon Faroe Islands Faroes Salmo salar |
genre_facet |
Atlantic salmon Faroe Islands Faroes Salmo salar |
op_source |
ICES Journal of Marine Science volume 79, issue 9, page 2442-2452 ISSN 1054-3139 1095-9289 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1093/icesjms/fsac182 |
container_title |
ICES Journal of Marine Science |
container_volume |
79 |
container_issue |
9 |
container_start_page |
2442 |
op_container_end_page |
2452 |
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1802642382843281408 |