Introgression of domesticated salmon changes life history and phenology of a wild salmon population
Abstract The release of domesticated conspecifics into the natural environment, whether deliberate or accidental, has the potential to alter the genetic integrity and evolutionary trajectory of wild populations. This widespread challenge is of particular concern for wild Atlantic salmon. By investig...
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ftdoajarticles:oai:doaj.org/article:03377570c32940119ea41bb9d312815c 2023-05-15T15:30:15+02:00 Introgression of domesticated salmon changes life history and phenology of a wild salmon population Francois Besnier Fernando Ayllon Øystein Skaala Monica Favnebøe Solberg Per Tommy Fjeldheim Kaja Anderson Sofie Knutar Kevin Alan Glover 2022-05-01T00:00:00Z https://doi.org/10.1111/eva.13375 https://doaj.org/article/03377570c32940119ea41bb9d312815c EN eng Wiley https://doi.org/10.1111/eva.13375 https://doaj.org/toc/1752-4571 1752-4571 doi:10.1111/eva.13375 https://doaj.org/article/03377570c32940119ea41bb9d312815c Evolutionary Applications, Vol 15, Iss 5, Pp 853-864 (2022) Atlantic salmon feralization genetic introgression Evolution QH359-425 article 2022 ftdoajarticles https://doi.org/10.1111/eva.13375 2022-12-30T21:28:33Z Abstract The release of domesticated conspecifics into the natural environment, whether deliberate or accidental, has the potential to alter the genetic integrity and evolutionary trajectory of wild populations. This widespread challenge is of particular concern for wild Atlantic salmon. By investigating phenotypic differences between the offspring of domesticated, hybrid, and wild Atlantic salmon released into the natural environment, earlier studies have documented the short‐term consequences of introgression from domesticated fish into wild salmon populations. However, few studies have investigated the joined product of introgression and natural selection after several generations. Here, we investigated the phenotypic response of an Atlantic salmon population that has been subjected to an average of 24% genetic admixture by domesticated conspecifics escaping from fish farms over three decades (approximately 6–7 generations). Individual levels of admixture were positively correlated with increased size at the smolt and adult stages for both sexes, a decrease in the age of male smolts, and a decrease in the age at maturity for males. These life history changes are presumably the consequence of the well‐documented directional selection for increased growth in domesticated salmon and are likely maladaptive. However, the most novel result of this study is that admixture was positively linked with delayed date of return to the river, with highly admixed fish arriving up to 26 days later than nonadmixed fish. Potentially, this phenological change provides admixed individuals with a survival advantage in the later phase of the life cycle as it reduces their period of exposure to selection through rod and line angling. We, therefore, conclude that while gene flow from domesticated conspecifics changes life history and phenological traits of wild Atlantic salmon populations, most of which are likely to be maladaptive, when pressured by additional anthropogenic challenges, some changes may confer a fitness advantage for ... Article in Journal/Newspaper Atlantic salmon Directory of Open Access Journals: DOAJ Articles Evolutionary Applications 15 5 853 864 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Atlantic salmon feralization genetic introgression Evolution QH359-425 |
spellingShingle |
Atlantic salmon feralization genetic introgression Evolution QH359-425 Francois Besnier Fernando Ayllon Øystein Skaala Monica Favnebøe Solberg Per Tommy Fjeldheim Kaja Anderson Sofie Knutar Kevin Alan Glover Introgression of domesticated salmon changes life history and phenology of a wild salmon population |
topic_facet |
Atlantic salmon feralization genetic introgression Evolution QH359-425 |
description |
Abstract The release of domesticated conspecifics into the natural environment, whether deliberate or accidental, has the potential to alter the genetic integrity and evolutionary trajectory of wild populations. This widespread challenge is of particular concern for wild Atlantic salmon. By investigating phenotypic differences between the offspring of domesticated, hybrid, and wild Atlantic salmon released into the natural environment, earlier studies have documented the short‐term consequences of introgression from domesticated fish into wild salmon populations. However, few studies have investigated the joined product of introgression and natural selection after several generations. Here, we investigated the phenotypic response of an Atlantic salmon population that has been subjected to an average of 24% genetic admixture by domesticated conspecifics escaping from fish farms over three decades (approximately 6–7 generations). Individual levels of admixture were positively correlated with increased size at the smolt and adult stages for both sexes, a decrease in the age of male smolts, and a decrease in the age at maturity for males. These life history changes are presumably the consequence of the well‐documented directional selection for increased growth in domesticated salmon and are likely maladaptive. However, the most novel result of this study is that admixture was positively linked with delayed date of return to the river, with highly admixed fish arriving up to 26 days later than nonadmixed fish. Potentially, this phenological change provides admixed individuals with a survival advantage in the later phase of the life cycle as it reduces their period of exposure to selection through rod and line angling. We, therefore, conclude that while gene flow from domesticated conspecifics changes life history and phenological traits of wild Atlantic salmon populations, most of which are likely to be maladaptive, when pressured by additional anthropogenic challenges, some changes may confer a fitness advantage for ... |
format |
Article in Journal/Newspaper |
author |
Francois Besnier Fernando Ayllon Øystein Skaala Monica Favnebøe Solberg Per Tommy Fjeldheim Kaja Anderson Sofie Knutar Kevin Alan Glover |
author_facet |
Francois Besnier Fernando Ayllon Øystein Skaala Monica Favnebøe Solberg Per Tommy Fjeldheim Kaja Anderson Sofie Knutar Kevin Alan Glover |
author_sort |
Francois Besnier |
title |
Introgression of domesticated salmon changes life history and phenology of a wild salmon population |
title_short |
Introgression of domesticated salmon changes life history and phenology of a wild salmon population |
title_full |
Introgression of domesticated salmon changes life history and phenology of a wild salmon population |
title_fullStr |
Introgression of domesticated salmon changes life history and phenology of a wild salmon population |
title_full_unstemmed |
Introgression of domesticated salmon changes life history and phenology of a wild salmon population |
title_sort |
introgression of domesticated salmon changes life history and phenology of a wild salmon population |
publisher |
Wiley |
publishDate |
2022 |
url |
https://doi.org/10.1111/eva.13375 https://doaj.org/article/03377570c32940119ea41bb9d312815c |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Evolutionary Applications, Vol 15, Iss 5, Pp 853-864 (2022) |
op_relation |
https://doi.org/10.1111/eva.13375 https://doaj.org/toc/1752-4571 1752-4571 doi:10.1111/eva.13375 https://doaj.org/article/03377570c32940119ea41bb9d312815c |
op_doi |
https://doi.org/10.1111/eva.13375 |
container_title |
Evolutionary Applications |
container_volume |
15 |
container_issue |
5 |
container_start_page |
853 |
op_container_end_page |
864 |
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1766360687791046656 |