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AKIHIKO FUKUSHI
Monbetsu Branch, Hokkaido Abashiri Fisheries Experimental Station Hokkaido Central Fisheries Experimental Station
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TAKUMA IMAMURA
Hokkaido Kushiro Fisheries Experimental Station
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HARUO TAKAHASHI
Monbetsu Branch, Hokkaido Abashiri Fisheries Experimental Station
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YUTAKA ITABASHI
Graduate School of Fisheries Sciences, Hokkaido University
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TOSHIYUKI SUZUKI
Tohoku National Fisheries Research Institute