SEASONAL CHARACTERISTICS OF GAMETOGENESIS IN THE CORBICULA JAPONICA
G. G. Kalinina, I. V. Matrosova, A. V. Evdokimova, V. V. Evdokimov
Chair of Aquaculture, Far East State Technical University of Fish Industry, Vladivostok
A morphological study of gonads in Corbicula japonica made it possible to distinguish between five stages of
gonad maturity. It has been established that stages of active gametogenesis, prespawning and of spawning go
almost in parallel and in the shortest time. In July, with the beginning of spawning, gametogenesis does not stop,
and oogenesis proceeds up to the end of August. Dynamics of changes of some chemical substances in oocytes was
followed. High concentrations of, respectively, RNA, albumens, lipids, glycoproteins and proteoglycans were
revealed in oocyte nuclei and nucleoli both at the beginning of the development, and at the stage of active
gametogenesis. This testifies in favor of a synthetic activity of these cells.
Back
Contents
Main
|
