Gene flow on the ice: Genetic differentiation among Adélie penguin colonies around Antarctica

AbstractEach summer Adélie penguins breed in large disjunct colonies on ice‐free areas around the Antarctic continent. Comprising > 10 million birds, this species represents a dominant feature of the Antarctic ecosystem. The patchy distribution within a large geographical range, natal philopatry...

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Bibliographic Details
Main Authors: AD Roeder, RK Marshall, AJ Mitchelson, T Visagathilagar, PA Ritchie, DR Love, TJ Pakai, HC McPartlan, ND Murray, Nick Robinson, KR Kerry, DM Lambert
Format: Article in Journal/Newspaper
Language:unknown
Published: 2001
Subjects:
Biological sciences
Ecology
Genetics
Science & Technology
Life Sciences & Biomedicine
Biochemistry & Molecular Biology
Evolutionary Biology
Environmental Sciences & Ecology
Antarctica
microsatellite
population genetics
Pygoscelis adeliae
CONTROL-REGION SEQUENCES
POPULATION-STRUCTURE
MICROSATELLITE LOCI
DNA-MICROSATELLITE
SUBDIVISION
ALLELES
POLYMORPHISM
INDICATORS
STATISTICS
SHOREBIRD
Antarctic
The Antarctic
Antarc*
Online Access:http://hdl.handle.net/10779/DRO/DU:24458470.v2
https://figshare.com/articles/journal_contribution/Gene_flow_on_the_ice_Genetic_differentiation_among_Ad_lie_penguin_colonies_around_Antarctica/24458470
Description
Summary:AbstractEach summer Adélie penguins breed in large disjunct colonies on ice‐free areas around the Antarctic continent. Comprising > 10 million birds, this species represents a dominant feature of the Antarctic ecosystem. The patchy distribution within a large geographical range, natal philopatry and a probable history of refugia, suggest that this species is likely to exhibit significant genetic differentiation within and among colonies. We present data from seven microsatellite DNA loci for 442 individuals from 13 locations around the Antarctic continent. With the exception of one locus, there was no significant genic or genotypic heterogeneity across populations. Pairwise FST values were low with no value > 0.02. When all colonies were compared in a single analysis, the overall FST value was 0.0007. Moreover, assignment tests were relatively ineffective at correctly placing individuals into their respective collection sites. These data reveal a lack of genetic differentiation between Adélie penguin colonies around the Antarctic continent, despite substantial levels of genetic variation. We consider this homogeneity in terms of the dispersal of individuals among colonies and the size of breeding groups and discuss our results in terms of the glacial history of Antarctica.

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