Indian Journal of Science and Technology

Fujimoto T.^*, Ohmae T.^*, Sato S.^°, Horiguchi R.⁺ , Nagahama Y.⁺ and Hirai T.^* 

^*Department of Biosciences, Teikyo University of Science and Technology, Yamanashi 409-0193, Japan. Fax +81- 554-634450 e-mail:  [email protected]
^°Niigata Prefectural Inland Water Fisheries Experiment Station, Niigata 940-1137, Japan.
⁺Laboratory of Reproductive Biology, National Institute for Basic Biology, Okazaki 444-8585 and Institution for Collaborative Relations, Ehime University, Matsuyama 790-8577, Japan.