Origin and Genetic Uniformity of Introduced Population of Cynops pyrrhogaster (Amphibia: Urodela) on Hachijojima Island

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  • TOMINAGA Atsushi
    Department of Natural Sciences, Faculty of Education, University of the Ryukyus
  • MEYER-ROCHOW V. Benno
    Resaerch Institute of Luminous Organisms Department of Genetics and Physiology, Oulu University
  • OKAMOTO Taku
    Department of Zoology, Graduate School of Science, Kyoto University
  • KURIYAMA Takeo
    Department of Environmental Science, Faculty of Science, Toho University
  • NISHIKAWA Kanto
    Graduate School of Human and Environmental Studies, Kyoto University
  • MATSUI Masafumi
    Graduate School of Human and Environmental Studies, Kyoto University

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  • Origin and Genetic Uniformity of Introduced Population of <i>Cynops pyrrhogaster</i> (Amphibia: Urodela) on Hachijojima Island

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Using mitochondrial DNA sequences, we surveyed genetic features of 12 individuals of Cynops pyrrhogaster introduced into Hachijojima Island, in order to estimate their possible origin in the main islands of Japan. The phylogenetic analysis revealed that the 12 examined newts of the introduced population display no genetic diversity and share characteristics with the conspecific population of Shikoku and thus belong to the WESTERN Clade proposed by earlier studies. Our results suggest that the Hachijojima population, having experienced a drastic founder effect, stems from very few individuals from the Shikoku District approximately 650 km to the west.

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