MEPS 276:161-172 (2004)  -  doi:10.3354/meps276161

Phylogeography of an intertidal direct-developing gastropod Batillaria cumingi around the Japanese Islands

Shigeaki Kojima1,*, Ikuo Hayashi2, Dongsung Kim3, Akiko Iijima4, Toshio Furota4

1Ocean Research Institute, University of Tokyo, 1-15-1 Minamidai, Nakano, Tokyo 164-8639, Japan
2Japan Sea National Fisheries Research Institute, Fisheries Research Agency, 1-5939-22 Suido-Cho, Niigata, Niigata 951-8121, Japan
3Korea Ocean Research and Development Institute, Ansan PO Box 29, Seoul 425-600, Korea
4Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan

ABSTRACT: The phylogeography of the direct-developing intertidal gastropod Batillaria cumingi was examined by comparing the nucleotide sequences of part of the mitochondrial gene for cytochrome c oxidase subunit I (COI) from 507 individuals, obtained from 24 sites that cover the distribution area of this species along the Japanese coasts, and from 2 sites on the Korean Peninsula. The individuals could be divided into 2 groups. Individuals in the first group mainly inhabit coasts along the Kuroshio Current, as well as Ariake Bay in western Kyushu, while the second group inhabits coasts along the Tsushima Current and its branches. Individuals in the 2 groups coexisted at only 3 sites, which correspond to the boundaries between the distributions of the 2 groups. The level of the genetic structure of B. cumingi is higher than those of the lecithotrophic gastropod species Turbo (Batillus) cornutus and the planktotrophic congeneric species B. multiformis.

KEY WORDS: Phylogeography · Direct development · Batillaria cumingi · Mitochondrial DNA · Japanese Islands

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