Recruitment strategy of swimming crab, Portunus trituberculatus, in Hiuchi-Nada, Japan |
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| Authors: | TETSUO YANAGI HIDESHI TSUKAMOTO SHUJO IGAWA KOHJI SHIOTA |
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| Institution: | Department of Civil emp;B Ocean Engineering, Ehime University, Matsuyama 790, Japan;Japan NUS, Shinyokohama 3–6-12, Koh-hoku-ku, Yokohama 222, Japan;Toyo Branch, Ehime Prefecture Chuyo Fisheries Experimental Station, Kawarazu, Toyo 799-13, Japan |
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| Abstract: | The recruitment strategy of swimming crabs, Portunus trituberculatus, was investigated by field observations and numerical experiments in Hiuchi-Nada, Japan. Calculated dispersal patterns of zoeal and megalopal stages in a three-dimensional numerical model reproduce observed patterns accurately. The temporal change of vertical migration patterns between the 1st and 2nd zoeas and the 3rd and 4th zoeas plays an important role in the process of recruitment of P. trituberculatus from spawning ground to nursery ground. |
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| Keywords: | crab recruitment numerical model vertical migration Hiuchi-Nada |
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