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Assessing polar bear ( Ursus maritimus ) population structure in the Hudson Bay region using SNP s
Author(s) -
Viengkone Michelle,
Derocher Andrew Edward,
Richardson Evan Shaun,
Malenfant René Michael,
Miller Joshua Moses,
Obbard Martyn E.,
Dyck Markus G.,
Lunn Nick J.,
Sahanatien Vicki,
Davis Corey S.
Publication year - 2016
Publication title -
ecology and evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.17
H-Index - 63
ISSN - 2045-7758
DOI - 10.1002/ece3.2563
Subject(s) - bay , ursus maritimus , population , geography , microsatellite , genetic structure , ecology , population genetics , biology , zoology , arctic , archaeology , genetic variation , genetics , demography , allele , sociology , gene
Defining subpopulations using genetics has traditionally used data from microsatellite markers to investigate population structure; however, single‐nucleotide polymorphisms ( SNP s) have emerged as a tool for detection of fine‐scale structure. In Hudson Bay, Canada, three polar bear ( Ursus maritimus ) subpopulations (Foxe Basin ( FB ), Southern Hudson Bay ( SH ), and Western Hudson Bay ( WH )) have been delineated based on mark–recapture studies, radiotelemetry and satellite telemetry, return of marked animals in the subsistence harvest, and population genetics using microsatellites. We used SNP s to detect fine‐scale population structure in polar bears from the Hudson Bay region and compared our results to the current designations using 414 individuals genotyped at 2,603 SNP s. Analyses based on discriminant analysis of principal components ( DAPC ) and STRUCTURE support the presence of four genetic clusters: (i) Western—including individuals sampled in WH , SH (excluding Akimiski Island in James Bay), and southern FB (south of Southampton Island); (ii) Northern—individuals sampled in northern FB (Baffin Island) and Davis Strait ( DS ) (Labrador coast); (iii) Southeast—individuals from SH (Akimiski Island in James Bay); and (iv) Northeast—individuals from DS (Baffin Island). Population structure differed from microsatellite studies and current management designations demonstrating the value of using SNP s for fine‐scale population delineation in polar bears.

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