Growth during the first summer at sea modulates sex-specific maturation schedule in Atlantic salmon
Recent decline in abundance of Atlantic salmon (Salmo salar) and concomitant changes in life history may result from a decline in the growth conditions during marine migration. Available literature suggests the existence of a sex-specific reaction norm linking maturation with environmental growth co...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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2021
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Online Access: | http://dx.doi.org/10.1139/cjfas-2020-0236 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2020-0236 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2020-0236 |
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crcansciencepubl:10.1139/cjfas-2020-0236 2024-09-30T14:32:24+00:00 Growth during the first summer at sea modulates sex-specific maturation schedule in Atlantic salmon Tréhin, Cécile Rivot, Etienne Lamireau, Ludivine Meslier, Lisa Besnard, Anne-Laure Gregory, Stephen D. Nevoux, Marie 2021 http://dx.doi.org/10.1139/cjfas-2020-0236 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2020-0236 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2020-0236 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 78, issue 6, page 659-669 ISSN 0706-652X 1205-7533 journal-article 2021 crcansciencepubl https://doi.org/10.1139/cjfas-2020-0236 2024-09-05T04:11:16Z Recent decline in abundance of Atlantic salmon (Salmo salar) and concomitant changes in life history may result from a decline in the growth conditions during marine migration. Available literature suggests the existence of a sex-specific reaction norm linking maturation with environmental growth conditions at sea. However, the extent to which this mechanism explains variations in age at maturity remains unclear. Using a historical collection of scales (1987–2017) from the Sélune River, France, we showed that marine growth declined over the first summer and remained stable during the subsequent periods at sea among returning salmon. Results support the hypothesis of a sex-specific probabilistic reaction norm, with individual probability to return after 1 year at sea increasing when growth increases. Females may require higher growth than males to attain their maturation threshold. This mechanism is a good candidate to explain temporal variability in sea-age at return at both the individual and population level in the Sélune population and in many other southern European populations. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 78 6 659 669 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Recent decline in abundance of Atlantic salmon (Salmo salar) and concomitant changes in life history may result from a decline in the growth conditions during marine migration. Available literature suggests the existence of a sex-specific reaction norm linking maturation with environmental growth conditions at sea. However, the extent to which this mechanism explains variations in age at maturity remains unclear. Using a historical collection of scales (1987–2017) from the Sélune River, France, we showed that marine growth declined over the first summer and remained stable during the subsequent periods at sea among returning salmon. Results support the hypothesis of a sex-specific probabilistic reaction norm, with individual probability to return after 1 year at sea increasing when growth increases. Females may require higher growth than males to attain their maturation threshold. This mechanism is a good candidate to explain temporal variability in sea-age at return at both the individual and population level in the Sélune population and in many other southern European populations. |
format |
Article in Journal/Newspaper |
author |
Tréhin, Cécile Rivot, Etienne Lamireau, Ludivine Meslier, Lisa Besnard, Anne-Laure Gregory, Stephen D. Nevoux, Marie |
spellingShingle |
Tréhin, Cécile Rivot, Etienne Lamireau, Ludivine Meslier, Lisa Besnard, Anne-Laure Gregory, Stephen D. Nevoux, Marie Growth during the first summer at sea modulates sex-specific maturation schedule in Atlantic salmon |
author_facet |
Tréhin, Cécile Rivot, Etienne Lamireau, Ludivine Meslier, Lisa Besnard, Anne-Laure Gregory, Stephen D. Nevoux, Marie |
author_sort |
Tréhin, Cécile |
title |
Growth during the first summer at sea modulates sex-specific maturation schedule in Atlantic salmon |
title_short |
Growth during the first summer at sea modulates sex-specific maturation schedule in Atlantic salmon |
title_full |
Growth during the first summer at sea modulates sex-specific maturation schedule in Atlantic salmon |
title_fullStr |
Growth during the first summer at sea modulates sex-specific maturation schedule in Atlantic salmon |
title_full_unstemmed |
Growth during the first summer at sea modulates sex-specific maturation schedule in Atlantic salmon |
title_sort |
growth during the first summer at sea modulates sex-specific maturation schedule in atlantic salmon |
publisher |
Canadian Science Publishing |
publishDate |
2021 |
url |
http://dx.doi.org/10.1139/cjfas-2020-0236 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2020-0236 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2020-0236 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 78, issue 6, page 659-669 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2020-0236 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
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78 |
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6 |
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659 |
op_container_end_page |
669 |
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1811636568518033408 |