Affiliation: | Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, University of Tokyo, Bunkyo, Tokyo 113-8657,; Ehime Prefectural Fish Disease Control Center, Uwajima, Ehime 798-0087,; Miyazaki Prefectural Fisheries Experimental Station, Miyazaki, Miyazaki 889-2162;and Mie Prefectural Science and Technology Promotion Center, Owase, Mie 519-3602, Japan |