کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2818795 1569890 2009 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The monophyletic origin of sea lions and fur seals (Carnivora; Otariidae) in the Southern Hemisphere
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی ژنتیک
پیش نمایش صفحه اول مقاله
The monophyletic origin of sea lions and fur seals (Carnivora; Otariidae) in the Southern Hemisphere
چکیده انگلیسی

The pinniped family Otariidae (sea lions and fur seals) is composed of 7 extant genera with 14 species. They are mainly distributed in the Southern Hemisphere, but the fossil record is only known from the Northern Hemisphere until Pliocene. To clarify the biological and zoogeographical events during their evolution, it is necessary to reconstruct a robust phylogenetic tree. However, phylogenetic relationships among otariids continue to be controversial, except for the basal position of the northern fur seal among the extant otariids. We reconstructed phylogenetic trees of otariids based on mitochondrial genomes and multiple nuclear genes (IRBP and type I STS markers). The monophyly of the otariids including both sea lions and fur seals in the Southern Hemisphere was strongly supported by both the mitochondrial and nuclear evidence. We propose a novel evolutionary and dispersal scenario of otariids based on this phylogenetic hypothesis, estimated divergence times, and fossil records. According to our results, the center of origin of the southern otariids is hypothesized to be the eastern South Pacific along the west coast of South America.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Gene - Volume 441, Issues 1–2, 15 July 2009, Pages 89–99
نویسندگان
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