1. Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan
2. Tokyo Kyuei Company Ltd., 1-15, Nihonbashi-3, Chuo, Tokyo 103-0027, Japan
3. Fukushima Prefectural Research Institute of Fisheries Resources, 1-1-14 Kouyou, Soma, Fukushima 976-0005, Japan
4. Fishery Division of Agriculture, Forestry and Fishery Department, 2-16 Sugitsuma-cho, Fukushima, Fukushima 960-8670, Japan