Universidad Peruana Cayetano Heredia

Ancient female philopatry, asymmetric male gene flow, and synchronous population expansion support the influence of climatic oscillations on the evolution of South American sea lion (Otaria flavescens)

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dc.contributor.author Oliveira, Larissa Rosa de
dc.contributor.author Gehara, Marcelo C. M.
dc.contributor.author Fraga, Lúcia D.
dc.contributor.author Lopes, Fernando
dc.contributor.author Túnez, Juan Ignacio
dc.contributor.author Cassini, Marcelo H.
dc.contributor.author Majluf, Patricia
dc.contributor.author Cardenas Alayza, Susana
dc.contributor.author Pavés, Héctor J.
dc.contributor.author Crespo, Enrique Alberto
dc.contributor.author García, Nestor
dc.contributor.author Loizaga de Castro, Rocío
dc.contributor.author Hoelzel, A. Rus
dc.contributor.author Sepúlveda, Maritza
dc.contributor.author Olavarría, Carlos
dc.contributor.author Valiati, Victor Hugo
dc.contributor.author Quiñones, Renato
dc.contributor.author Pérez-Alvarez, Maria Jose
dc.contributor.author Ott, Paulo Henrique
dc.contributor.author Bonatto, Sandro L.
dc.date.accessioned 2019-01-25T15:02:17Z
dc.date.available 2019-01-25T15:02:17Z
dc.date.issued 2017
dc.identifier.uri https://hdl.handle.net/20.500.12866/4599
dc.description.abstract The South American sea lion (Otaria flavescens) is widely distributed along the southern Atlantic and Pacific coasts of South America with a history of significant commercial exploitation. We aimed to evaluate the population genetic structure and the evolutionary history of South American sea lion along its distribution by analyses of mitochondrial DNA (mtDNA) and 10 nuclear microsatellites loci. We analyzed 147 sequences of mtDNA control region and genotyped 111 individuals of South American sea lion for 10 microsatellite loci, representing six populations (Peru, Northern Chile, Southern Chile, Uruguay (Brazil), Argentina and Falkland (Malvinas) Islands) and covering the entire distribution of the species. The mtDNA phylogeny shows that haplotypes from the two oceans comprise two very divergent clades as observed in previous studies, suggesting a long period (>1 million years) of low inter-oceanic female gene flow. Bayesian analysis of bi-parental genetic diversity supports significant (but less pronounced than mitochondrial) genetic structure between Pacific and Atlantic populations, although also suggested some inter-oceanic gene flow mediated by males. Higher male migration rates were found in the intra-oceanic population comparisons, supporting very high female philopatry in the species. Demographic analyses showed that populations from both oceans went through a large population expansion ~10,000 years ago, suggesting a very similar influence of historical environmental factors, such as the last glacial cycle, on both regions. Our results support the proposition that the Pacific and Atlantic populations of the South American sea lion should be considered distinct evolutionarily significant units, with at least two managements units in each ocean. en_US
dc.language.iso eng
dc.publisher Public Library of Science
dc.relation.ispartofseries PLoS ONE
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject Gene Flow en_US
dc.subject Animal Migration/physiology en_US
dc.subject Animals en_US
dc.subject DNA, Mitochondrial/genetics en_US
dc.subject Female en_US
dc.subject Genetic Variation en_US
dc.subject Genetics, Population en_US
dc.subject Male en_US
dc.subject Oceans and Seas en_US
dc.subject Phylogeny en_US
dc.subject Population Dynamics en_US
dc.subject Sea Lions/genetics en_US
dc.subject South America en_US
dc.title Ancient female philopatry, asymmetric male gene flow, and synchronous population expansion support the influence of climatic oscillations on the evolution of South American sea lion (Otaria flavescens) en_US
dc.type info:eu-repo/semantics/article
dc.identifier.doi https://doi.org/10.1371/journal.pone.0179442
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#1.06.12
dc.relation.issn 1932-6203


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