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1 February 2012 Genetic Population Structure and Life History Characteristics of the Rare Brackish-Water Crab Deiratonotus kaoriae Miura, Kawane and Wada, 2007 (Brachyura: Camptandriidae) in Western Japan
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Abstract

Ecological and phylogeographical investigations were made of disjunct populations of Deiratonotus kaoriae Miura, Kawane and Wada, 2007 in the Kumanoe (Miyazaki Prefecture) and Miyagawa (Mie Prefecture) Rivers, so as to compare life history patterns and elucidate genetic relationships between them. The relationship of carapace width with sex and occurrence of ovigerous females revealed a similar life history pattern throughout, new recruits occurring in spring and summer, reaching maturity the following autumn, and breeding in winter and spring. Large-sized individuals disappeared before the next breeding season, indicating longevity to be around 1.5 years. However, genetic analysis suggested an absence of present-day larval migration between the two populations. Two genetic groups present in the Miyagawa population were estimated to have diverged from the Kumanoe population in the Pleistocene.

© The Crustacean Society, 2012. Published by Koninklijke Brill NV, Leiden
Masako Kawane, Keiji Wada, Akihiro Umemoto, and Tomoyuki Miura "Genetic Population Structure and Life History Characteristics of the Rare Brackish-Water Crab Deiratonotus kaoriae Miura, Kawane and Wada, 2007 (Brachyura: Camptandriidae) in Western Japan," Journal of Crustacean Biology 32(1), 119-125, (1 February 2012). https://doi.org/10.1163/193724011X615398
Received: 4 April 2011; Accepted: 1 July 2011; Published: 1 February 2012
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