Reproductive Characters and Population Structure of the Subtidal Hermit Crab Pagurus ochotensis (Anomura: Paguridae)

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  • Wada Satoshi
    JSPS Research Fellow, Faculty of Fisheries, Hokkaido University

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Abstract: Reproductive characters and the population structure of the subtidal hermit crab, Pagurus ochotensis Brandt, 1851are described, based on samples collected from Akkeshi Bay, eastern Hokkaido, Japan from April 1998to September 1999. Crab abundance increased markedly in June 1998, and became small after May 1999.Ovigerous females were observed from March to September, and male precopulatory guarding behavior of ovigerous females was observed in June and July, suggesting that some crabs may have two or more clutches a year. Smaller females bred earlier than larger females. This variation in the timing of breeding might be explained either as anadaptation to or as being determined by environmental or physiological constraints.

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  • BENTHOS RESEARCH

    BENTHOS RESEARCH 56 (1), 43-46, 2001

    日本ベントス学会

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