Captive-bred Atlantic salmon released into the wild have fewer offspring than wild-bred fish and decrease population productivity

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dc.contributor.authorO'Sullivan, Ronan J.
dc.contributor.authorAykanat, Tutku
dc.contributor.authorJohnston, Susan E.
dc.contributor.authorRogan, Ger
dc.contributor.authorPoole, Russell
dc.contributor.authorProdöhl, Paulo A.
dc.contributor.authorde Eyto, Elvira
dc.contributor.authorPrimmer, Craig R.
dc.contributor.authorMcGinnity, Philip
dc.contributor.authorReed, Thomas E.
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderMarine Institute, Irelanden
dc.contributor.funderDepartment for the Economyen
dc.contributor.funderDepartment for the Economy, Northern Irelanden
dc.contributor.funderEuropean Research Councilen
dc.contributor.funderHorizon 2020en
dc.contributor.funderDepartment for Culture, Heritage and the Gaeltacht, Irelanden
dc.contributor.funderAcademy of Finlanden
dc.date.accessioned2021-07-01T15:50:26Z
dc.date.available2021-07-01T15:50:26Z
dc.date.issued2020-10-21
dc.date.updated2021-07-01T15:37:59Z
dc.description.abstractThe release of captive-bred animals into the wild is commonly practised to restore or supplement wild populations but comes with a suite of ecological and genetic consequences. Vast numbers of hatchery-reared fish are released annually, ostensibly to restore/enhance wild populations or provide greater angling returns. While previous studies have shown that captive-bred fish perform poorly in the wild relative to wild-bred conspecifics, few have measured individual lifetime reproductive success (LRS) and how this affects population productivity. Here, we analyse data on Atlantic salmon from an intensely studied catchment into which varying numbers of captive-bred fish have escaped/been released and potentially bred over several decades. Using a molecular pedigree, we demonstrate that, on average, the LRS of captive-bred individuals was only 36% that of wild-bred individuals. A significant LRS difference remained after excluding individuals that left no surviving offspring, some of which might have simply failed to spawn, consistent with transgenerational effects on offspring survival. The annual productivity of the mixed population (wild-bred plus captive-bred) was lower in years where captive-bred fish comprised a greater fraction of potential spawners. These results bolster previous empirical and theoretical findings that intentional stocking, or non-intentional escapees, threaten, rather than enhance, recipient natural populations.en
dc.description.sponsorshipScience Foundation Ireland, the Marine Institute and the Department for the Economy, Northern Ireland (under the Investigators Programme Grant Number SFI/15/IA/3028); Department for Culture, Heritage and the Gaeltacht, Ireland); Academy of Finland (grant numbers 141231, 137710, 307593, 302873 and 31939)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid20201671en
dc.identifier.citationO'Sullivan, R. J., Aykanat, T., Johnston, S. E., Rogan, G., Poole, R., Prodöhl, P. A., de Eyto, E., Primmer, C. R., McGinnity, P. and Reed, T. E. (2020) 'Captive-bred Atlantic salmon released into the wild have fewer offspring than wild-bred fish and decrease population productivity', Proceedings of the Royal Society B: Biological Sciences, 287(1937), 20201671 (8 pp). doi: 10.1098/rspb.2020.1671en
dc.identifier.doi10.1098/rspb.2020.1671en
dc.identifier.endpage8en
dc.identifier.issn0962-8452
dc.identifier.issued1937en
dc.identifier.journaltitleProceedings of The Royal Society B-Biological Sciencesen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/11528
dc.identifier.volume287en
dc.language.isoenen
dc.publisherThe Royal Societyen
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.projectinfo:eu-repo/grantAgreement/EC/H2020::ERC::ERC-STG/639192/EU/Alternative life histories: linking genes to phenotypes to demography/ALHen
dc.relation.urihttps://royalsocietypublishing.org/doi/10.1098/rspb.2020.1671
dc.rights© 2020 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectCaptive breedingen
dc.subjectStockingen
dc.subjectAtlantic salmonen
dc.subjectLifetime reproductive successen
dc.subjectReproductive successen
dc.subjectSteelhead trouten
dc.subjectHatchery programsen
dc.subjectBrown trouten
dc.subjectFitnessen
dc.subjectStockingen
dc.subjectSalaren
dc.subjectConservationen
dc.subjectConsequencesen
dc.subjectSelectionen
dc.titleCaptive-bred Atlantic salmon released into the wild have fewer offspring than wild-bred fish and decrease population productivityen
dc.typeArticle (peer-reviewed)en
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