Affiliation: | (1) Lake Biwa Museum, 1091 Oroshimo, Kusatsu, Shiga 525-0001, Japan, JP;(2) Faculty of Agriculture, Ehime University, 3-5-7 Tarumi, Matsuyama 790-8566, Japan (e-mail: takagi@agr.ehime-u.ac.jp), JP;(3) Japan Fisheries Resource Conservation Association, 4-18 Toyomi-cho, Chuo-ku, Tokyo 104-0055, Japan, JP |