Evolutionary drivers of kype size in atlantic salmon (salmo salar): domestication, age and genetics
The diversity of reproduction and associated mating patterns in Atlantic salmon (Salmo salar) has long captivated evolutionary biologists. Salmo salar exhibit strategies involving migration, bold mating behaviours and radical morphological and physiological change. One such radical change is the elo...
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Online Access: | http://hdl.handle.net/11250/2609829 https://doi.org/10.1098/rsos.190021 |
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ftimr:oai:imr.brage.unit.no:11250/2609829 2023-05-15T15:31:50+02:00 Evolutionary drivers of kype size in atlantic salmon (salmo salar): domestication, age and genetics Perry, William Solberg, Monica Favnebøe Besnier, Francois Dyrhovden, Lise Matre, Ivar Helge Fjelldal, Per Gunnar Ayllon, Fernando Creer, Simon Llewellyn, Martin Taylor, Martin I. Carvalho, Gary Glover, Kevin 2019 application/pdf http://hdl.handle.net/11250/2609829 https://doi.org/10.1098/rsos.190021 eng eng Norges forskningsråd: 200510 urn:issn:2054-5703 http://hdl.handle.net/11250/2609829 https://doi.org/10.1098/rsos.190021 cristin:1714814 6 Royal Society Open Science 4 Journal article Peer reviewed 2019 ftimr https://doi.org/10.1098/rsos.190021 2021-09-23T20:15:50Z The diversity of reproduction and associated mating patterns in Atlantic salmon (Salmo salar) has long captivated evolutionary biologists. Salmo salar exhibit strategies involving migration, bold mating behaviours and radical morphological and physiological change. One such radical change is the elongation and curvature of the lower jaw in sexually mature males into a hook-like appendage called the kype. The kype is a secondary sexual characteristic used in mating hierarchies and a prime candidate for sexual selection. As one of the core global aquaculture fish species, however, mate choice, and thus sexual selection, has been replaced by industrial artificial fertilization seeking to develop more commercially viable strains. Removal of mate choice provides a unique opportunity to examine the kype over successive generations in the absence of sexual selection. Here we use a large-scale common-garden experiment, incorporating six experimental strains (wild, farmed and wild × farmed hybrids), experiencing one to three sea winters, to assess the impact of age and genetic background. After controlling for allometry, fork length-adjusted kype height (AKH) was significantly reduced in the domesticated strain in comparison to two wild strains. Furthermore, genetic variation at a locus on linkage group SSA1 was associated with kype height, and a locus on linkage group SSA23 was associated with fork length-adjusted kype length (AKL). The reduction in fork length-AKH in domesticated salmon suggests that the kype is of importance in mate choice and that it has decreased due to relaxation of sexual selection. Fork length-AKL showed an increase in domesticated individuals, highlighting that it may not be an important cue in mate choice. These results give us insight into the evolutionary significance of the kype, as well as implications of genetic induced phenotypic change caused by domesticated individuals escaping into the natural environment. publishedVersion Article in Journal/Newspaper Atlantic salmon Salmo salar Institute for Marine Research: Brage IMR Royal Society Open Science 6 4 190021 |
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Open Polar |
collection |
Institute for Marine Research: Brage IMR |
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ftimr |
language |
English |
description |
The diversity of reproduction and associated mating patterns in Atlantic salmon (Salmo salar) has long captivated evolutionary biologists. Salmo salar exhibit strategies involving migration, bold mating behaviours and radical morphological and physiological change. One such radical change is the elongation and curvature of the lower jaw in sexually mature males into a hook-like appendage called the kype. The kype is a secondary sexual characteristic used in mating hierarchies and a prime candidate for sexual selection. As one of the core global aquaculture fish species, however, mate choice, and thus sexual selection, has been replaced by industrial artificial fertilization seeking to develop more commercially viable strains. Removal of mate choice provides a unique opportunity to examine the kype over successive generations in the absence of sexual selection. Here we use a large-scale common-garden experiment, incorporating six experimental strains (wild, farmed and wild × farmed hybrids), experiencing one to three sea winters, to assess the impact of age and genetic background. After controlling for allometry, fork length-adjusted kype height (AKH) was significantly reduced in the domesticated strain in comparison to two wild strains. Furthermore, genetic variation at a locus on linkage group SSA1 was associated with kype height, and a locus on linkage group SSA23 was associated with fork length-adjusted kype length (AKL). The reduction in fork length-AKH in domesticated salmon suggests that the kype is of importance in mate choice and that it has decreased due to relaxation of sexual selection. Fork length-AKL showed an increase in domesticated individuals, highlighting that it may not be an important cue in mate choice. These results give us insight into the evolutionary significance of the kype, as well as implications of genetic induced phenotypic change caused by domesticated individuals escaping into the natural environment. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Perry, William Solberg, Monica Favnebøe Besnier, Francois Dyrhovden, Lise Matre, Ivar Helge Fjelldal, Per Gunnar Ayllon, Fernando Creer, Simon Llewellyn, Martin Taylor, Martin I. Carvalho, Gary Glover, Kevin |
spellingShingle |
Perry, William Solberg, Monica Favnebøe Besnier, Francois Dyrhovden, Lise Matre, Ivar Helge Fjelldal, Per Gunnar Ayllon, Fernando Creer, Simon Llewellyn, Martin Taylor, Martin I. Carvalho, Gary Glover, Kevin Evolutionary drivers of kype size in atlantic salmon (salmo salar): domestication, age and genetics |
author_facet |
Perry, William Solberg, Monica Favnebøe Besnier, Francois Dyrhovden, Lise Matre, Ivar Helge Fjelldal, Per Gunnar Ayllon, Fernando Creer, Simon Llewellyn, Martin Taylor, Martin I. Carvalho, Gary Glover, Kevin |
author_sort |
Perry, William |
title |
Evolutionary drivers of kype size in atlantic salmon (salmo salar): domestication, age and genetics |
title_short |
Evolutionary drivers of kype size in atlantic salmon (salmo salar): domestication, age and genetics |
title_full |
Evolutionary drivers of kype size in atlantic salmon (salmo salar): domestication, age and genetics |
title_fullStr |
Evolutionary drivers of kype size in atlantic salmon (salmo salar): domestication, age and genetics |
title_full_unstemmed |
Evolutionary drivers of kype size in atlantic salmon (salmo salar): domestication, age and genetics |
title_sort |
evolutionary drivers of kype size in atlantic salmon (salmo salar): domestication, age and genetics |
publishDate |
2019 |
url |
http://hdl.handle.net/11250/2609829 https://doi.org/10.1098/rsos.190021 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
6 Royal Society Open Science 4 |
op_relation |
Norges forskningsråd: 200510 urn:issn:2054-5703 http://hdl.handle.net/11250/2609829 https://doi.org/10.1098/rsos.190021 cristin:1714814 |
op_doi |
https://doi.org/10.1098/rsos.190021 |
container_title |
Royal Society Open Science |
container_volume |
6 |
container_issue |
4 |
container_start_page |
190021 |
_version_ |
1766362351624257536 |