Pleistocene population expansions of Antarctic seals

Curtis, Caitlin, Stewart, Brent S. and Karl, Stephen A. (2009) Pleistocene population expansions of Antarctic seals. Molecular Ecology, 18 10: 2112-2121. doi:10.1111/j.1365-294X.2009.04166.x


Author Curtis, Caitlin
Stewart, Brent S.
Karl, Stephen A.
Title Pleistocene population expansions of Antarctic seals
Journal name Molecular Ecology   Check publisher's open access policy
ISSN 0962-1083
1365-294X
Publication date 2009-05
Sub-type Article (original research)
DOI 10.1111/j.1365-294X.2009.04166.x
Open Access Status Not yet assessed
Volume 18
Issue 10
Start page 2112
End page 2121
Total pages 10
Place of publication Chichester, West Sussex, United Kingdom
Publisher Wiley-Blackwell Publishing
Language eng
Formatted abstract
We sequenced a portion (c. 475 bp) of the mitochondrial control region of three species of Antarctic phocid carnivores (Weddell seal, Leptonychotes weddellii, N = 181; crabeater seal, Lobodon carcinophaga, N = 143; and Ross seal, Ommatophoca rossii, N = 41) that live seasonally or permanently in the fast ice and seasonal pack ice of the western Amundsen and Ross seas of western Antarctica. We resolved 251 haplotypes with a haplotype diversity of 0.98 to 0.99. Bayesian estimates of from the program LAMARC ranged from 0.075 for Weddell seals to 0.576 for crabeater seals. We used the values of theta to estimate female effective population sizes (NEF), which were 40 700 to 63 000 for Weddell seals, 44 400 to 97 800 for Ross seals, and 358 500 to 531 900 for crabeater seals. We used mismatch distributions to test for historical population size expansions. Weddell seals and crabeater seals had significant, unimodal mean pairwise difference distributions (P = 0.56 and 0.36, respectively), suggesting that their populations expanded suddenly around 731 000 years ago (Weddell seals) and around 1.6 million years ago (crabeater seals). Both of these expansions occurred during times of intensified glaciations and may have been fostered by expanding pack ice habitat.
Keyword Genetically effective population size
Mitochondrial DNA
Pinniped
Theta
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Biological Sciences Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 10 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 14 times in Scopus Article | Citations
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Created: Wed, 23 Mar 2016, 15:25:03 EST by Caitlin Curtis on behalf of Learning and Research Services (UQ Library)