Affiliation: | a Nikko Station, National Research Institute of Fisheries Science, Nikko, Tochigi 321-1661, Japan b Ueda Station, National Research Institute of Fisheries Science, Nagano 386-0031, Japan c Yamagata Prefecture Inland Fisheries Experiment Station, Yamagata 992-0063, Japan d Yamagata Prefecture Fisheries Experiment Station, Yamagata 997-1204, Japan e Yamagata Prefectural Fish Farming Center, Yamagata 999-7463, Japan f Shiga Prefecture Fisheries Experiment Station, Shiga 522-0057, Japan g Ocean Research Institute, University of Tokyo, Tokyo 164-8639, Japan |