Institution: | Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa 252-8510,;Division of Aquatic Resource Science, Faculty of Fisheries, Kagoshima University, Kagoshima 890-0056, and;Inland Station, National Research Institute of Aquaculture, Fisheries Research Agency, Watarai, Mie 519-0423, Japan |