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MBE Advance Access originally published online on April 27, 2005
Molecular Biology and Evolution 2005 22(7):1543-1545; doi:10.1093/molbev/msi155
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© The Author 2005. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. All rights reserved. For permissions, please e-mail: journals.permissions@oupjournals.org

Letter

Biogeography of Luminous Marine Ostracod Driven Irreversibly by the Japan Current

Katsunori Ogoh and Yoshihiro Ohmiya

Research Institute for Cell Engineering, National Institute of Advanced Industrial Science and Technology, Osaka, Japan

E-mail: y-ohmiya{at}aist.go.jp.

The biogeography of the luminous marine ostracod Vargula hilgendorfii, also called "Umihotaru," shows that this organism may have arrived relatively recently on the Japanese islands during the final glacier period approximately 10,000 years ago. Phylogenetic relationships also strongly indicate that the Japan Current drove the Umihotaru ostracod northward. It is evident that the Umihotaru ostracod spread rapidly to the major Japanese islands 3,000 km north, whereas its spread was slow in the southwest of the Japanese islands, covering a distance of 400 km. The meandering of the Japan Current, where it passes by the Tokara Gap at 28°N latitude, may be a barrier to Umihotaru ostracod extension.

Key Words: biogeography • genetic divergence • Japan Current • mitochondrial DNA • Okinawa • Ostracoda • refugia


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K. Ogoh and Y. Ohmiya
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[Abstract] [Full Text] [PDF]


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