Institution: | Department of Biology, Faculty of Education, Gifu University, Gifu, Gifu 501-1193, ;Department of Biology, Faculty of Fisheries, Nagasaki University, Nagasaki, Nagasaki 851-2213, ;Miyako Station, Japan Sea-Farming Association, Miyako, Iwate 027-0097 and ;Hokkaido National Fisheries Research Institute, Kushiro, Hokkaido 085-0802, Japan |