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Hiroshi Ueda
Toya Lake Station for Environmental Biology, Faculty of Fisheries, Hokkaido Univeristy
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Masahide Kaeriyama
Hokkaido Salmon Hachery, Fisheries Agency of Japan
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Kenzo Kurihara
Faculty of Pharmaceutical Sciences, Hokkaido University
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Kohei Yamauchi
Department of Biology, Faculty of Fisheries, Hokkaido University