1. 1) K. Tsukamoto, R. Ishida, K. Naka, and T. Kajihara: Switching of size and migratory pattern in successive generations of landlocked ayu. In “Common strategies of anadromous and catadromous fishes” American Fisheries Society Symposium 1. (eds. by M. J. Dadswell, R. J. Klauda, C. M. Moffitt, R. L. Saunders, R. A. Rulifson, and J. E. Cooper), American Fisheries Society, Bethesda, Maryland, 1987, pp. 492-506.
2. 2) M. Azuma: Studies on the variability of the landlocked ayu-fish, Plecoglossus altivelis T. and S., in Lake Biwa. IV. Consideration on the grouping and features of variability. Japan. J. Ecol., 23, 255-265 (1973).
3. 3) S. Seki, N. Taniguchi, and S. -R. Jeon: Genetic divergence among natural populations of ayu from Japan and Korea. Nippon Suisan Gakkaishi, 54, 559-568 (1988) (in Japanese).
4. 4) L. A. Pastene, K. Numachi, and K. Tsukamoto: Examination of reproductive success of transplanted stocks in an amphidromous fish, Plecoglossus altivelis (Temmink et Schlegel) using mitochondrial DNA and isozyme markers. J. Fish Biol., 39, 93-100 (1991).
5. 5) M. Azuma: On the origin of Koayu, a landlocked form of am phidromous ayu-fish, Plecoglossus altivelis. Verhandlungen der Internationalen Vereinigung fur Theoretische and Angewandte Limnologie 21, 1981, pp. 1291-1296.