家鱼人工催产机理的研究

STUDIES ON THE MECHANISMS OF INDUCED SPAWNING BY ARTIFICALLY IN FARM FISHES IN POND CULTURING IN CHINA

Gonadotripic hormone(GTH)can be normally synthesized in the gonadotropic hormone cells (GTH cells)in the pituitary glands of Ctenophuryngodon idellus and Mylopharyngodon piceus both of which were growing in the pond environment. But,in reproductive seasons, the amount of GTH produced by GTH cells is not enough to make the mature ova perform meiosis. The studies show that GTH cells can produce enough GTH to make the ova be maturity and ovulation after injecting luteiniz- ing hormone releasing hormone analogue (LRH-A)to mature broodfish of the two kinds of fish. After injecting the solution of composition of carp pituitary glands,the GTH cells did not produce GTH,and the forms of GTH cells had no changes and were the same as the forms before injecting. So,we can say that the mechanisms of induced spawning by artifically in Ctenopharyngodon idellus, Mylopkaryngodon piceus, Hypophtlialmichthys inolitrix, Aristickys nobilis which were growing in pond environment are as follows: