Newly discovered habitat of a threatened goby, Acanthogobius insularis (Perciformes: Gobiidae), in southern part of Okinawa-jima Island, Japan

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Acanthogobius insularis Shibukawa and Taki (1996) is a threatened goby species, previously known to be restricted to estuaries on Amami-oshima Island and northern part of Okinawa-jima Island. However, we found this species in two estuaries in the southern part of Okinawa-jima Island (Toyosaki and Manko), which are separated from their habitats in the northern part of the island by approx. 60 km of coral reefs. Morphologies of four specimens collected in Toyosaki and Manko examined in the present study correspond to the original description of A. insularis. This study reports that Toyosaki is the southernmost habitat of this species based on specimens. Because it is thought that A. insularis move to unknown spawning habitats in winter and because only one individual has been found in Manko, it is necessary to understand the habitats that these newly discovered small populations use, in their entirety.

source:http://biogeo.a.la9.jp/

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  • Biogeography

    Biogeography 19 (0), 69-74, 2017

    日本生物地理学会

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