Reduced fitness of Atlantic salmon released in the wild after one generation of captive breeding
Abstract Salmonids rank among the most socioeconomically valuable fishes and the most targeted species by stocking with hatchery‐reared individuals. Here, we used molecular parentage analysis to assess the reproductive success of wild‐ and hatchery‐born Atlantic salmon over three consecutive years i...
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crwiley:10.1111/eva.12028 2024-09-15T17:56:12+00:00 Reduced fitness of Atlantic salmon released in the wild after one generation of captive breeding Milot, Emmanuel Perrier, Charles Papillon, Lucie Dodson, Julian J. Bernatchez, Louis 2012 http://dx.doi.org/10.1111/eva.12028 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feva.12028 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eva.12028 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/eva.12028 en eng Wiley http://creativecommons.org/licenses/by/3.0/ Evolutionary Applications volume 6, issue 3, page 472-485 ISSN 1752-4571 1752-4571 journal-article 2012 crwiley https://doi.org/10.1111/eva.12028 2024-08-22T04:17:47Z Abstract Salmonids rank among the most socioeconomically valuable fishes and the most targeted species by stocking with hatchery‐reared individuals. Here, we used molecular parentage analysis to assess the reproductive success of wild‐ and hatchery‐born Atlantic salmon over three consecutive years in a small river in Q uébec. Yearly restocking in this river follows a single generation of captive breeding. Among the adults returning to the river to spawn, between 11% and 41% each year were born in hatchery. Their relative reproductive success ( RRS ) was nearly half that of wild‐born fish (0.55). RRS varied with life stage, being 0.71 for fish released at the fry stage and 0.42 for fish released as smolt. The lower reproductive success of salmon released as smolt was partly mediated by the modification of the proportion of single‐sea‐winter/multi‐sea‐winter fish. Overall, our results suggest that modifications in survival and growth rates alter the life‐history strategies of these fish at the cost of their reproductive success. Our results underline the potential fitness decrease, warn on long‐term evolutionary consequences for the population of repeated stocking and support the adoption of more natural rearing conditions for captive juveniles and their release at a younger stage, such as unfed fry. Article in Journal/Newspaper Atlantic salmon Wiley Online Library Evolutionary Applications 6 3 472 485 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract Salmonids rank among the most socioeconomically valuable fishes and the most targeted species by stocking with hatchery‐reared individuals. Here, we used molecular parentage analysis to assess the reproductive success of wild‐ and hatchery‐born Atlantic salmon over three consecutive years in a small river in Q uébec. Yearly restocking in this river follows a single generation of captive breeding. Among the adults returning to the river to spawn, between 11% and 41% each year were born in hatchery. Their relative reproductive success ( RRS ) was nearly half that of wild‐born fish (0.55). RRS varied with life stage, being 0.71 for fish released at the fry stage and 0.42 for fish released as smolt. The lower reproductive success of salmon released as smolt was partly mediated by the modification of the proportion of single‐sea‐winter/multi‐sea‐winter fish. Overall, our results suggest that modifications in survival and growth rates alter the life‐history strategies of these fish at the cost of their reproductive success. Our results underline the potential fitness decrease, warn on long‐term evolutionary consequences for the population of repeated stocking and support the adoption of more natural rearing conditions for captive juveniles and their release at a younger stage, such as unfed fry. |
format |
Article in Journal/Newspaper |
author |
Milot, Emmanuel Perrier, Charles Papillon, Lucie Dodson, Julian J. Bernatchez, Louis |
spellingShingle |
Milot, Emmanuel Perrier, Charles Papillon, Lucie Dodson, Julian J. Bernatchez, Louis Reduced fitness of Atlantic salmon released in the wild after one generation of captive breeding |
author_facet |
Milot, Emmanuel Perrier, Charles Papillon, Lucie Dodson, Julian J. Bernatchez, Louis |
author_sort |
Milot, Emmanuel |
title |
Reduced fitness of Atlantic salmon released in the wild after one generation of captive breeding |
title_short |
Reduced fitness of Atlantic salmon released in the wild after one generation of captive breeding |
title_full |
Reduced fitness of Atlantic salmon released in the wild after one generation of captive breeding |
title_fullStr |
Reduced fitness of Atlantic salmon released in the wild after one generation of captive breeding |
title_full_unstemmed |
Reduced fitness of Atlantic salmon released in the wild after one generation of captive breeding |
title_sort |
reduced fitness of atlantic salmon released in the wild after one generation of captive breeding |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.1111/eva.12028 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feva.12028 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eva.12028 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/eva.12028 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Evolutionary Applications volume 6, issue 3, page 472-485 ISSN 1752-4571 1752-4571 |
op_rights |
http://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.1111/eva.12028 |
container_title |
Evolutionary Applications |
container_volume |
6 |
container_issue |
3 |
container_start_page |
472 |
op_container_end_page |
485 |
_version_ |
1810432410782793728 |