Loading…
Assessing polar bear ( Ursus maritimus ) population structure in the Hudson Bay region using SNP s
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 maritimu...
Saved in:
Published in: | Ecology and evolution 2016-12, Vol.6 (23), p.8474-8484 |
---|---|
Main Authors: | , , , , , , , , , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | 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. |
---|---|
ISSN: | 2045-7758 2045-7758 |
DOI: | 10.1002/ece3.2563 |