1. Azuma, M. 1973. Studies on the variability of the landlocked ayu-fish,Plecoglossus altivelis T. et S., in Lake Biwa. IV. Consideration on the grouping and features of variability. Japan. J. Ecol., 23(6): 255–265. (In Japanese with English abstract.)
2. Azuma, M. 1980. Koayu. Pages 154–161in T. Kawai, H. Kawanabe and N. Mizuno, eds. Freshwater aquatic of Japan. Tokai Univ. Press, Tokyo. (In Japanese.)
3. Ito, T., T. Tomita and T. Iwai. 1971. Studies on the artificial production of ayu fish seeding LXXI. Influence of temperature upon the hatching of fertilized eggs of ayu fish. Artificial Propagation of Ayu Fish, (1): 57–98. (In Japanese.)
4. Kinoshita, I. 1986. Postlarvae and juveniles of silver sea bream,Sparus sarba occurring in the surf zones of Tosa Bay, Japan. Japan. J. Ichthyol., 33(1): 7–12.
5. Kinoshita, I., S. Fujita, I. Takahashi and K. Azuma. 1988. Occurrence of larval and juvenile Japanese snook,Lates japonicus, in the Shimanto estuary, Japan. Japan. J. Ichthyol., 34(4): 462–467.