English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/166453
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:


Chinstrap penguin population genetic structure: one or more populations along the southern ocean?

AuthorsMura-Jornet, Isidora; Pimentel, Carolina; Dantas, Gisele P. M.; Petry, Maria V.; González-Acuña, Daniel; Barbosa, Andrés ; Lowther, Andrew D.; Kovacs, Kit M.; Poulin, Elie; Vianna, Juliana A.
Pygoscelis antarcticus
Gene flow
Issue Date13-Jun-2018
PublisherBioMed Central
CitationBMC Evolutionary Biology 18(1): 90
Abstract[Background] 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 (Bouvetøya).
[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 (Bouvetøya). 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 Bouvetøya (overall microsatellite FST = 0.002, p = 0.273; mtDNA FST = − 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.
Publisher version (URL)https://doi.org/10.1186/s12862-018-1207-0
Appears in Collections:(MNCN) Artículos
Files in This Item:
File Description SizeFormat 
chinstrap_ocean_2018.pdf958,09 kBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.