Selection against individuals from genetic introgression of escaped farmed salmon in a natural population of Atlantic salmon
Abstract The viability of wild Atlantic salmon populations is threatened by genetic introgression from escaped farmed salmon. Farmed Atlantic salmon are genetically improved for important commercial traits and a life in captivity but are poorly adapted to the natural environment. The rate of gene fl...
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Online Access: | http://dx.doi.org/10.1111/eva.13213 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eva.13213 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/eva.13213 |
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crwiley:10.1111/eva.13213 2024-09-15T17:55:51+00:00 Selection against individuals from genetic introgression of escaped farmed salmon in a natural population of Atlantic salmon Wacker, Sebastian Aronsen, Tonje Karlsson, Sten Ugedal, Ola Diserud, Ola H. Ulvan, Eva M. Hindar, Kjetil Næsje, Tor F. 2021 http://dx.doi.org/10.1111/eva.13213 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eva.13213 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/eva.13213 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Evolutionary Applications volume 14, issue 5, page 1450-1460 ISSN 1752-4571 1752-4571 journal-article 2021 crwiley https://doi.org/10.1111/eva.13213 2024-08-27T04:26:13Z Abstract The viability of wild Atlantic salmon populations is threatened by genetic introgression from escaped farmed salmon. Farmed Atlantic salmon are genetically improved for important commercial traits and a life in captivity but are poorly adapted to the natural environment. The rate of gene flow from escaped farmed to wild salmon depends on their spawning success and on offspring survival at various life stages. We here investigate relative survival of introgressed juvenile Atlantic salmon (parr) in a river in northern Norway. The studied population has experienced genetic introgression from farmed salmon for about four generations (20 years). We followed two cohorts of parr from the year of hatching (0+) to the age of 2 years (2+). Farmed genetic introgression was quantified at the individual level and on a continuous scale using diagnostic SNPs. Population‐level genetic introgression decreased from 0+ to 2+ by 64% (2011 cohort) and 37% (2013 cohort). This change was driven by a 70% (2011 cohort) and 49% (2013 cohort) lower survival from age 0+ to 2+ in introgressed parr compared to parr of wild origin. Our observations show that there is natural selection against genetic introgression with a potential cost of lower productivity. Article in Journal/Newspaper Atlantic salmon Northern Norway Wiley Online Library Evolutionary Applications 14 5 1450 1460 |
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Open Polar |
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Wiley Online Library |
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language |
English |
description |
Abstract The viability of wild Atlantic salmon populations is threatened by genetic introgression from escaped farmed salmon. Farmed Atlantic salmon are genetically improved for important commercial traits and a life in captivity but are poorly adapted to the natural environment. The rate of gene flow from escaped farmed to wild salmon depends on their spawning success and on offspring survival at various life stages. We here investigate relative survival of introgressed juvenile Atlantic salmon (parr) in a river in northern Norway. The studied population has experienced genetic introgression from farmed salmon for about four generations (20 years). We followed two cohorts of parr from the year of hatching (0+) to the age of 2 years (2+). Farmed genetic introgression was quantified at the individual level and on a continuous scale using diagnostic SNPs. Population‐level genetic introgression decreased from 0+ to 2+ by 64% (2011 cohort) and 37% (2013 cohort). This change was driven by a 70% (2011 cohort) and 49% (2013 cohort) lower survival from age 0+ to 2+ in introgressed parr compared to parr of wild origin. Our observations show that there is natural selection against genetic introgression with a potential cost of lower productivity. |
format |
Article in Journal/Newspaper |
author |
Wacker, Sebastian Aronsen, Tonje Karlsson, Sten Ugedal, Ola Diserud, Ola H. Ulvan, Eva M. Hindar, Kjetil Næsje, Tor F. |
spellingShingle |
Wacker, Sebastian Aronsen, Tonje Karlsson, Sten Ugedal, Ola Diserud, Ola H. Ulvan, Eva M. Hindar, Kjetil Næsje, Tor F. Selection against individuals from genetic introgression of escaped farmed salmon in a natural population of Atlantic salmon |
author_facet |
Wacker, Sebastian Aronsen, Tonje Karlsson, Sten Ugedal, Ola Diserud, Ola H. Ulvan, Eva M. Hindar, Kjetil Næsje, Tor F. |
author_sort |
Wacker, Sebastian |
title |
Selection against individuals from genetic introgression of escaped farmed salmon in a natural population of Atlantic salmon |
title_short |
Selection against individuals from genetic introgression of escaped farmed salmon in a natural population of Atlantic salmon |
title_full |
Selection against individuals from genetic introgression of escaped farmed salmon in a natural population of Atlantic salmon |
title_fullStr |
Selection against individuals from genetic introgression of escaped farmed salmon in a natural population of Atlantic salmon |
title_full_unstemmed |
Selection against individuals from genetic introgression of escaped farmed salmon in a natural population of Atlantic salmon |
title_sort |
selection against individuals from genetic introgression of escaped farmed salmon in a natural population of atlantic salmon |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1111/eva.13213 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eva.13213 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/eva.13213 |
genre |
Atlantic salmon Northern Norway |
genre_facet |
Atlantic salmon Northern Norway |
op_source |
Evolutionary Applications volume 14, issue 5, page 1450-1460 ISSN 1752-4571 1752-4571 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/eva.13213 |
container_title |
Evolutionary Applications |
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14 |
container_issue |
5 |
container_start_page |
1450 |
op_container_end_page |
1460 |
_version_ |
1810432072125251584 |