雌二醇诱导革胡子鲇性转化及性腺观察

The Estradiol Induction of Sex Reversal in Clarias Lazera and the Gonad Observation

本文主要阐述用一定剂量的雌二醇投喂革胡子鲇仔鱼一段时间，在性成熟的实验鱼性腺中卵巢成分占绝大多数，仅在卵巢的表面有少许精巢组织。

The fry of Clarias lazera are adminstered orally with estradiol at a dosage of 100μg per gram diet for 90 days.After 14 months culturing,8 exterimental fish are survival and are checked. No urogenital papilla existed in male is found in each of 8 fish. One out of 8 fish is anatomized. The vast majority of its gonads are ovaries consisting of a lot of mature green ova. Only a few of white testes which shape cysts are on the surface of the ovaries.Through section observation,numerous mature ova and primary ova are found in the ovaries.The testes on the surface of the ovaries consist of a lot of spermatogonia and spermatids and mature sperms. In the region between the ovaries and the testes tissue,the degenerated testes are found. Each of 7 out of 8 fish mates with one normal male.The offsprings are alive.The results show that the 100μg estradio 1/1g diet can improve the males to develop into the females.