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Yasuaki Niizuma
Laboratory of Applied Zoology, Faculty of Agriculture, Hokkaido University
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Akinori Takahashi
Akkeshi Marine Biological Station, Faculty of Science, Hokkaido University Department of Polar Science, School of Mathematical and Physical Science, The Graduate University for Advanced Study
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Mayumi Sawada
Laboratory of Biology and Fish Population, Department of Fishing Science, Faculty of Fisheries, Hokkaido University Division of Marine Ecology, Research Institute of North Pacific Fisheries, Hokkaido University
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Yutaka Watanuki
Laboratory of Applied Zoology, Faculty of Agriculture, Hokkaido University