Evolutionary stasis of a heritable morphological trait in a wild fish population despite apparent directional selection
Abstract Comparing observed versus theoretically expected evolutionary responses is important for our understanding of the evolutionary process, and for assessing how species may cope with anthropogenic change. Here, we document directional selection for larger female size in Atlantic salmon, using...
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Online Access: | http://dx.doi.org/10.1002/ece3.5274 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.5274 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.5274 |
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crwiley:10.1002/ece3.5274 2024-06-02T08:03:41+00:00 Evolutionary stasis of a heritable morphological trait in a wild fish population despite apparent directional selection O'Sullivan, Ronan James Aykanat, Tutku Johnston, Susan E. Kane, Adam Poole, Russell Rogan, Ger Prodöhl, Paulo A. Primmer, Craig R. McGinnity, Philip Reed, Thomas Eric H2020 European Research Council Academy of Finland Science Foundation Ireland Marine Institute University College Dublin 2019 http://dx.doi.org/10.1002/ece3.5274 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.5274 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.5274 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Ecology and Evolution volume 9, issue 12, page 7096-7111 ISSN 2045-7758 2045-7758 journal-article 2019 crwiley https://doi.org/10.1002/ece3.5274 2024-05-03T11:16:45Z Abstract Comparing observed versus theoretically expected evolutionary responses is important for our understanding of the evolutionary process, and for assessing how species may cope with anthropogenic change. Here, we document directional selection for larger female size in Atlantic salmon, using pedigree‐derived estimates of lifetime reproductive success as a fitness measure. We show the trait is heritable and, thus, capable of responding to selection. The Breeder's Equation, which predicts microevolution as the product of phenotypic selection and heritability, predicted evolution of larger size. This was at odds, however, with the observed lack of either phenotypic or genetic temporal trends in body size, a so‐called “paradox of stasis.” To investigate this paradox, we estimated the additive genetic covariance between trait and fitness, which provides a prediction of evolutionary change according to Robertson's secondary theorem of selection (STS) that is unbiased by missing variables. The STS prediction was consistent with the observed stasis. Decomposition of phenotypic selection gradients into genetic and environmental components revealed a potential upward bias, implying unmeasured factors that covary with trait and fitness. These results showcase the power of pedigreed, wild population studies—which have largely been limited to birds and mammals—to study evolutionary processes on contemporary timescales. Article in Journal/Newspaper Atlantic salmon Wiley Online Library Ecology and Evolution 9 12 7096 7111 |
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English |
description |
Abstract Comparing observed versus theoretically expected evolutionary responses is important for our understanding of the evolutionary process, and for assessing how species may cope with anthropogenic change. Here, we document directional selection for larger female size in Atlantic salmon, using pedigree‐derived estimates of lifetime reproductive success as a fitness measure. We show the trait is heritable and, thus, capable of responding to selection. The Breeder's Equation, which predicts microevolution as the product of phenotypic selection and heritability, predicted evolution of larger size. This was at odds, however, with the observed lack of either phenotypic or genetic temporal trends in body size, a so‐called “paradox of stasis.” To investigate this paradox, we estimated the additive genetic covariance between trait and fitness, which provides a prediction of evolutionary change according to Robertson's secondary theorem of selection (STS) that is unbiased by missing variables. The STS prediction was consistent with the observed stasis. Decomposition of phenotypic selection gradients into genetic and environmental components revealed a potential upward bias, implying unmeasured factors that covary with trait and fitness. These results showcase the power of pedigreed, wild population studies—which have largely been limited to birds and mammals—to study evolutionary processes on contemporary timescales. |
author2 |
H2020 European Research Council Academy of Finland Science Foundation Ireland Marine Institute University College Dublin |
format |
Article in Journal/Newspaper |
author |
O'Sullivan, Ronan James Aykanat, Tutku Johnston, Susan E. Kane, Adam Poole, Russell Rogan, Ger Prodöhl, Paulo A. Primmer, Craig R. McGinnity, Philip Reed, Thomas Eric |
spellingShingle |
O'Sullivan, Ronan James Aykanat, Tutku Johnston, Susan E. Kane, Adam Poole, Russell Rogan, Ger Prodöhl, Paulo A. Primmer, Craig R. McGinnity, Philip Reed, Thomas Eric Evolutionary stasis of a heritable morphological trait in a wild fish population despite apparent directional selection |
author_facet |
O'Sullivan, Ronan James Aykanat, Tutku Johnston, Susan E. Kane, Adam Poole, Russell Rogan, Ger Prodöhl, Paulo A. Primmer, Craig R. McGinnity, Philip Reed, Thomas Eric |
author_sort |
O'Sullivan, Ronan James |
title |
Evolutionary stasis of a heritable morphological trait in a wild fish population despite apparent directional selection |
title_short |
Evolutionary stasis of a heritable morphological trait in a wild fish population despite apparent directional selection |
title_full |
Evolutionary stasis of a heritable morphological trait in a wild fish population despite apparent directional selection |
title_fullStr |
Evolutionary stasis of a heritable morphological trait in a wild fish population despite apparent directional selection |
title_full_unstemmed |
Evolutionary stasis of a heritable morphological trait in a wild fish population despite apparent directional selection |
title_sort |
evolutionary stasis of a heritable morphological trait in a wild fish population despite apparent directional selection |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1002/ece3.5274 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.5274 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.5274 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Ecology and Evolution volume 9, issue 12, page 7096-7111 ISSN 2045-7758 2045-7758 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ece3.5274 |
container_title |
Ecology and Evolution |
container_volume |
9 |
container_issue |
12 |
container_start_page |
7096 |
op_container_end_page |
7111 |
_version_ |
1800748279234822144 |