Institution: | ;Fish Feed Section, Inland Station, National Research Institute of Aquaculture, Tamaki, Mie 519-0423, ;Reproductive Technology Section, Coastal Station, National Research Institute of Aquaculture, Nansei, Mie 516-0193 and ;Research Coordinating Section, National Research Institute of Fisheries Science, Yokohama, Kanagawa 236-8648, Japan |