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dc.contributor.authorTavares, Sara B.
dc.contributor.authorSamarra, Filipa I. P.
dc.contributor.authorPascoal, Sonia
dc.contributor.authorGraves, Jeff A.
dc.contributor.authorMiller, Patrick J. O.
dc.identifier.citationTavares , S B , Samarra , F I P , Pascoal , S , Graves , J A & Miller , P J O 2018 , ' Killer whales ( Orcinus orca ) in Iceland show weak genetic structure among diverse isotopic signatures and observed movement patterns ' , Ecology and Evolution , vol. 8 , no. 23 , pp. 11900-11913 .
dc.identifier.otherPURE: 256167409
dc.identifier.otherPURE UUID: ec372b18-951a-4c29-a203-e3c8b1013566
dc.identifier.otherScopus: 85056476814
dc.identifier.otherORCID: /0000-0001-7216-6913/work/50743973
dc.identifier.otherWOS: 000454107200044
dc.descriptionFunding was provided by the Fundação para a Ciência e a Tecnologia (grant number SFRH/BD/84714/2012) and a MASTS (The Marine Alliance for Science and Technology for Scotland) pooling initiative (grant reference SG188) funded by the Scottish Funding Council (grant reference HR09011) and contributing institutions to S.B.T. and the Icelandic Research Fund (Rannsóknasjóđur, grant number 120248042) to F.I.P.S.en
dc.description.abstractLocal adaption through ecological niche specialization can lead to genetic structure between and within populations. In the Northeast Pacific, killer whales (Orcinus orca) of the same population have uniform specialized diets that are non‐overlapping with other sympatric, genetically divergent, and socially isolated killer whale ecotypes. However, killer whales in Iceland show intrapopulation variation of isotopic niches and observed movement patterns: some individuals appear to specialize on herring and follow it year‐round while others feed upon herring only seasonally or opportunistically. We investigated genetic differentiation among Icelandic killer whales with different isotopic signatures and observed movement patterns. This information is key for management and conservation purposes but also for better understanding how niche specialization drives genetic differentiation. Photo‐identified individuals (N = 61) were genotyped for 22 microsatellites and a 611 bp portion of the mitochondrial DNA (mtDNA) control region. Photo‐identification of individuals allowed linkage of genetic data to existing data on individual isotopic niche, observed movement patterns, and social associations. Population subdivision into three genetic units was supported by a discriminant analysis of principal components (DAPC). Genetic clustering corresponded to the distribution of isotopic signatures, mtDNA haplotypes, and observed movement patterns, but genetic units were not socially segregated. Genetic differentiation was weak (FST < 0.1), suggesting ongoing gene flow or recent separation of the genetic units. Our results show that killer whales in Iceland are not as genetically differentiated, ecologically discrete, or socially isolated as the Northeast Pacific prey‐specialized killer whales. If any process of ecological divergence and niche specialization is taking place among killer whales in Iceland, it is likely at a very early stage and has not led to the patterns observed in the Northeast Pacific.
dc.relation.ispartofEcology and Evolutionen
dc.rightsCopyright © 2018 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.subjectEcological nicheen
dc.subjectGenetic differentiationen
dc.subjectKiller whalesen
dc.subjectOrcinus orcaen
dc.subjectPopulation ecologyen
dc.subjectQH301 Biologyen
dc.subjectQH426 Geneticsen
dc.titleKiller whales (Orcinus orca) in Iceland show weak genetic structure among diverse isotopic signatures and observed movement patternsen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Biologyen
dc.contributor.institutionUniversity of St Andrews.Sea Mammal Research Uniten
dc.contributor.institutionUniversity of St Andrews.Marine Alliance for Science & Technology Scotlanden
dc.contributor.institutionUniversity of St Andrews.Scottish Oceans Instituteen
dc.contributor.institutionUniversity of St Andrews.Institute of Behavioural and Neural Sciencesen
dc.contributor.institutionUniversity of St Andrews.Centre for Social Learning & Cognitive Evolutionen
dc.contributor.institutionUniversity of St Andrews.Bioacoustics groupen
dc.description.statusPeer revieweden

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