Sexual behavior and reproductivity of male fish were studied as an in vivo screening method of endocrine disruptors. Male medaka (Oryzias latipes) were exposed to 17β-estradiol at nominal concentrations of 2 and 20 ㎍/l 14 days. After exposure of th...
Sexual behavior and reproductivity of male fish were studied as an in vivo screening method of endocrine disruptors. Male medaka (Oryzias latipes) were exposed to 17β-estradiol at nominal concentrations of 2 and 20 ㎍/l 14 days. After exposure of the chemical, sexual behavior between male medaka and normal female which were injected with prostaglandin F2α just before the test, was ana lysed by using video camera for one hour. Normal control male showed courtship dancing such as following, guarding, dancing and crossing while 17β-estradiol treated male did not show any type of courtship dancing. Furthermore, fecundity and fertility were significantly decreased in the treated group. It was suggested that analysis of sexual behavior could be a useful endpoint for the screening of the endocrine disruptors.