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dc.contributor.authorMcGinnity, Philip
dc.contributor.authorProdohl, Paulo
dc.contributor.authorFerguson, Andy
dc.contributor.authorHynes, Rosaleen
dc.contributor.authorÓ Maoiléidigh, Niall
dc.contributor.authorBaker, Natalie
dc.contributor.authorCotter, Deirdre
dc.contributor.authorO'Hea, Brendan
dc.contributor.authorCooke, Declan
dc.contributor.authorRogan, Ger
dc.contributor.authorTaggart, John
dc.contributor.authorCross, Tom
dc.date.accessioned2012-11-05T16:17:17Z
dc.date.available2012-11-05T16:17:17Z
dc.date.issued2003
dc.identifier.citationMcGinnity, P., Prodo, P., Ferguson, A., Hynes, R., Ó Maoileidigh, N., Baker, N., Cotter, D., O'Hea, B., Cooke, D., Rogan, G., Taggart, J., and Cross, T. Fitness reduction and potential extinction of wild populations of Atlantic salmon, Salmo salar, as a result of interactions with escaped farm salmon. Proceedings of the Royal Society Biological Sciences, 270: 2443-2450.en_GB
dc.identifier.urihttp://hdl.handle.net/10793/836
dc.identifier.urihttp://rspb.royalsocietypublishing.org/content/270/1532/2443.full.pdf+html
dc.identifier.uridoi:10.1098/rspb.2003.2520
dc.descriptionNOTICE: this is the author’s version of a work that was accepted for publication in Proceedings of the Royal Society Biological Sciences. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Proceedings of the Royal Society Biological Sciences, [Issue 270, (October 2003)] doi: 10.1098/rspb.2003.2520, http://rspb.royalsocietypublishing.org/content/270/1532/2443.full.pdf+htmlen_GB
dc.descriptionpeer-reviewed
dc.description.abstractThe high level of escapes from Atlantic salmon farms, up to two million fishes per year in the North Atlantic, has raised concern about the potential impact on wild populations. We report on a twogeneration experiment examining the estimated lifetime successes, relative to wild natives, of farm, F1 and F2 hybrids and BC1 backcrosses to wild and farm salmon. Offspring of farm and ‘hybrids’ (i.e. all F1, F2 and BC1 groups) showed reduced survival compared with wild salmon but grew faster as juveniles and displaced wild parr, which as a group were significantly smaller. Where suitable habitat for these emigrant parr is absent, this competition would result in reduced wild smolt production. In the experimental conditions, where emigrants survived downstream, the relative estimated lifetime success ranged from 2% (farm) to 89% (BC1 wild) of that of wild salmon, indicating additive genetic variation for survival. Wild salmon primarily returned to fresh water after one sea winter (1SW) but farm and ‘hybrids’ produced proportionately more 2SW salmon. However, lower overall survival means that this would result in reduced recruitment despite increased 2SW fecundity. We thus demonstrate that interaction of farm with wild salmon results in lowered fitness, with repeated escapes causing cumulative fitness depression and potentially an extinction vortex in vulnerable populations.en_GB
dc.language.isoenen_GB
dc.publisherThe Royal Societyen_GB
dc.relation.ispartofseries;270
dc.subjectescaped farm salmonen_GB
dc.subjectcommon garden experimenten_GB
dc.subjectDNA profilingen_GB
dc.subjectoutbreeding depressionen_GB
dc.subjectlifetime successen_GB
dc.subjectextinction vortexen_GB
dc.titleFitness reduction and potential extinction of wild populations of Atlantic salmon, Salmo salar, as a result of interactions with escaped farm salmonen_GB
dc.typeMonographen_GB
refterms.dateFOA2018-01-12T04:51:28Z


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