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Mana ITO
National Research Institute of Fisheries and Environment of Inland Sea, Fisheries Research and Education Agency
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Akifumi OHTAKA
Department of Natural Science, Faculty of Eduation, Hirosaki University
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Takaaki TORII
IDEA Consultants Inc.
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Katsutoshi ITO
National Research Institute of Fisheries and Environment of Inland Sea, Fisheries Research and Education Agency