Evolutionary stasis of a heritable morphological trait in a wild fish population despite apparent directional selection

dc.contributor.authorO'Sullivan, Ronan J.
dc.contributor.authorAykanat, Tutku
dc.contributor.authorJohnston, Susan E.
dc.contributor.authorKane, Adam
dc.contributor.authorPoole, Russell
dc.contributor.authorRogan, Ger
dc.contributor.authorProdöhl, Paulo A.
dc.contributor.authorPrimmer, Craig R.
dc.contributor.authorMcGinnity, Philip
dc.contributor.authorReed, Thomas E.
dc.contributor.funderEuropean Research Councilen
dc.contributor.funderHorizon 2020en
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderMarine Institute, Irelanden
dc.contributor.funderAcademy of Finlanden
dc.date.accessioned2021-07-01T14:59:23Z
dc.date.available2021-07-01T14:59:23Z
dc.date.issued2019-06-11
dc.date.updated2021-07-01T14:45:30Z
dc.description.abstractComparing 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.en
dc.description.sponsorshipSuomen Akatemia, Academy of Finland (Grant/Award Number: 137710 , 141231, 302873, 307593 and 318939); Science Foundation Ireland (Grant/Award Number: 16/RI/3404 and 15/IA/3028)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationO'Sullivan, R. J., Aykanat, T., Johnston, S. E., Kane, A., Poole, R., Rogan, G., Prodöhl, P. A., Primmer, C. R., McGinnity, P. and Reed, T. E. (2019) 'Evolutionary stasis of a heritable morphological trait in a wild fish population despite apparent directional selection', Ecology and Evolution, 9(12), pp. 7096-7111. doi: 10.1002/ece3.5274en
dc.identifier.doi10.1002/ece3.5274en
dc.identifier.endpage71111en
dc.identifier.issn2045-7758
dc.identifier.issued12en
dc.identifier.journaltitleEcology and Evolutionen
dc.identifier.startpage7096en
dc.identifier.urihttps://hdl.handle.net/10468/11527
dc.identifier.volume9en
dc.language.isoenen
dc.publisherWileyen
dc.relation.projectinfo:eu-repo/grantAgreement/EC/H2020::ERC::ERC-STG/639192/EU/Alternative life histories: linking genes to phenotypes to demography/ALHen
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Investigator Programme/15/IA/3028/IE/Wild farmed interactions in a changing world: formulation of a predictive methodology to inform environmental best practice to secure long-term sustainability of global wild and farm fish populations/en
dc.relation.urihttps://onlinelibrary.wiley.com/doi/full/10.1002/ece3.5274
dc.rights© 2019 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectAtlantic salmonen
dc.subjectPedigreeen
dc.subjectPhenotypic selectionen
dc.subjectSecondary theorem of selectionen
dc.subjectBreeder's equationen
dc.titleEvolutionary stasis of a heritable morphological trait in a wild fish population despite apparent directional selectionen
dc.typeArticle (peer-reviewed)en
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