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Authordc.contributor.authorMura-Jornet, Isidora 
Authordc.contributor.authorPimentel, Carolina 
Authordc.contributor.authorDantas, Gisele P. M. 
Authordc.contributor.authorPetry, María Virginia 
Authordc.contributor.authorGonzález Acuña, Daniel 
Authordc.contributor.authorBarbosa, Andrés 
Authordc.contributor.authorLowther, Andrew D. 
Authordc.contributor.authorKovacs, Kit M. 
Authordc.contributor.authorPoulin, Elie 
Authordc.contributor.authorVianna, Juliana 
Cita de ítemdc.identifier.citationBMC Eevolutionary Biology Volumen: 18 Número de artículo: 90es_ES
Abstractdc.description.abstractBackground: Historical factors, demography, reproduction and dispersal are crucial in determining the genetic structure of seabirds. In the Antarctic marine environment, penguins are a major component of the avian biomass, dominant predators and important bioindicators of ecological change. Populations of chinstrap penguins have decreased in nearly all their breeding sites, and their range is expanding throughout the Antarctic Peninsula. Population genetic structure of this species has been studied in some colonies, but not between breeding colonies in the Antarctic Peninsula or at the species' easternmost breeding colony (Bouvetoya). Results: Connectivity, sex-biased dispersal, diversity, genetic structure and demographic history were studied using 12 microsatellite loci and a mitochondrial DNA region (HVRI) in 12 breeding colonies in the South Shetland Islands (SSI) and the Western Antarctic Peninsula (WAP), and one previously unstudied sub-Antarctic island, 3600 km away from the WAP (Bouvetoya). High genetic diversity, evidence of female bias-dispersal and a sign of population expansion after the last glacial maximum around 10,000 mya were detected. Limited population genetic structure and lack of isolation by distance throughout the region were found, along with no differentiation between the WAP and Bouvetoya (overall microsatellite F-ST = 0.002, p = 0.273; mtDNA F-ST = -0.004, p = 0.766), indicating long distance dispersal. Therefore, genetic assignment tests could not assign individuals to their population(s) of origin. The most differentiated location was Georges Point, one of the southernmost breeding colonies of this species in the WAP. Conclusions: The subtle differentiation found may be explained by some combination of low natal philopatric behavior, high rates of dispersal and/or generally high mobility among colonies of chinstrap penguins compared to other Pygoscelis species.es_ES
Patrocinadordc.description.sponsorshipChilean Antarctic Institute INACH T_27-10 G_06-11 RT_12-14 FONDECYT project 1150517 CONICYT project PIA ACT172065 GAB CONICYT-PCHA/MagisterNacional/2016-22162312 National Council for Scientific and Technological Research - CNPq 482501/2013-8 INCT-APA 574018/2008-5 Spanish Ministry of Economy and Competitiveness CGL2004-01348 CGL2007-60369 CTM2011-24427es_ES
Publisherdc.publisherBiomed Centrales_ES
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile*
Link to Licensedc.rights.uri*
Sourcedc.sourceBMC Eevolutionary Biologyes_ES
Keywordsdc.subjectPygoscelis antarcticuses_ES
Keywordsdc.subjectGene flowes_ES
Títulodc.titleChinstrap penguin population genetic structure: one or more populations along the Southern Ocean?es_ES
Document typedc.typeArtículo de revistaes_ES
Indexationuchile.indexArtículo de publicación ISIes_ES

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Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Chile