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Genetic population structure of Hemigrammocypris rasborella (Cyprinidae) inferred from mtDNA sequences |
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| Authors: | Katsutoshi Watanabe Seiichi Mori Tetsuo Tanaka Naoyuki Kanagawa Takahiko Itai Jyun-ichi Kitamura Noriyasu Suzuki Koji Tominaga Ryo Kakioka Ryoichi Tabata Tsukasa Abe Yushu Tashiro Yoshiki Hashimoto Jun Nakajima Norio Onikura |
| Institution: | 1. Department of Zoology, Division of Biological Science, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto, 606-8502, Japan 2. Biological Laboratory, Gifu-Keizai University, 5-50 Kitagata, Ogaki, Gifu, 503-8550, Japan 3. The Museum of Nature and Human Activities, Hyogo, 6 Yayoigaoka, Sanda, Hyogo, 669-1546, Japan 4. 4-3-26 Honmachi, Fujieda, Shizuoka, 426-0018, Japan 5. NPO Network for Shizuoka Prefecture Museum of Natural History, 5-10-28-604 Chiyoda, Aoi-ku, Shizuoka, 420-0803, Japan 6. Mie Prefectural Museum, 3060 Ishinden-Kouzubeta, Tsu, Mie, 514-0061, Japan 7. Graduate School of Bioresources, Mie University, 1577 Kurima-machiyamachi, Tsu, Mie, 514-8507, Japan 8. Chiba Biodiversity Center, Nature Conservation Division, Environmental and Community Affairs Department, Chiba Prefectural Government, 955-2 Aoba-cho, Chuo-ku, Chiba, 260-8682, Japan 15. Kwansei Gakuin Senior High School, 1-155 Uegahara-ichibancho, Nishinomiya, Hyogo, 662-8501, Japan 14. Center for Ecological Research, Kyoto University, 509-3 Hirano 2-chome, Otsu, Shiga, 520-2113, Japan 9. Biodiversity Research Division, Lago Co., Ltd, Okayama Freshwater Fish Society, 396-2 Taga, Omihachiman, Shiga, 523-0821, Japan 10. Sanagochi Nature Center, 5-8 Okawara, Sanagochi, Tokushima, 771-4102, Japan 16. Center of Redevelopment of Pollution-Damaged Areas, Osaka, 1-1-1 Chibune, Nishiyodogawa-ku, Osaka, 555-0013, Japan 11. Conservation of Fresh-water Fish of Kagawa, 643-2 Yashimanishimachi, Takamatsu, Kagawa, 761-0113, Japan 12. Fukuoka Institute of Health and Environmental Sciences, Mukaizano 39, Dazaifu, Fukuoka, 818-0135, Japan 13. Fishery Research Laboratory, Kyushu University, 4-46-24 Tsuyazaki, Fukutsu, Fukuoka, 811-3304, Japan |
| Abstract: | The genetic population structure of the small cyprinid Hemigrammocypris rasborella, distributed widely in lowlands of western Japan, was examined using partial sequence data of mitochondrial DNA (mtDNA). Molecular phylogenetic analysis revealed that the populations of the western Kyushu region were markedly differentiated from all eastern populations, such that the groups would be comparable to different species; their divergence was inferred to have occurred in the Late Miocene–Pliocene. Also, a largely divergent mtDNA group (with divergence in the early Pleistocene) was found in the Sanyo and northeastern Shikoku regions, forming a secondary contact zone in the western Kinki with the eastern mtDNA group. To date, these aspects of the population structure of H. rasborella appear to be unique among lowland fishes in western Japan. Deeper understanding of the formation processes of freshwater faunas in western Japan will require further comparisons of the phylogeographic patterns and ecological traits of constituent species. |
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