Genetic variation of southern hemisphere fur seals (Arctocephalus spp.): investigation of population structure and species identity

The Journal of Heredity
G M LentoC Scott Baker

Abstract

We have examined phylogenetic and geographic patterns of variation in the mitochondrial cytochrome b gene of Southern Hemisphere fur seals (Arctocephalus spp.). Our survey of 106 individuals from four putative species reveals three distinct patterns of variation reflecting ancient, recent historic, and contemporary gene flow. For the combined samples of Subantarctic (Arctocephalus tropicalis) and Antarctic (Arctocephalus gazella) fur seals, we find low levels of sequence diversity and reciprocal paraphyly of hapiotypes (where representative haplotypes of a species are found to occur infrequently in another species and vice versa). For the Australian and Cape fur seal subspecies (Arctocephalus pusillus doriferus and A. p. pusillus, respectively), we find low levels of sequence diversity but significant differences in the regional distribution of haplotypes that are consistent with, but not conclusive of, the current subspecies definition based on nonmolecular data. For the New Zealand fur seal (Arctocephalus forsteri), we find high levels of average sequence diversity because of the survival of two divergent lineages of mitochondrial hapiotypes with differences approaching that found in interspecific comparisons of other mammals...Continue Reading

Citations

Jan 16, 2016·Molecular Phylogenetics and Evolution·Alexander T SalisNicolas J Rawlence
May 26, 2017·Mitochondrial DNA. Part A. DNA Mapping, Sequencing, and Analysis·Arsalan Emami-KhoyiTerry-Ann Else
Apr 10, 2007·The Journal of Heredity·Nathalie J PatenaudeC Scott Baker

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