17β-雌二醇对大鳞副泥鳅生长和性腺分化的影响

Effects of 17β- estradiol on sex differentiation and growth in Paramisgurnus dabryanus( Sauvage)

采用短期连续投喂的方式,研究了不同浓度17β-雌二醇(0.25、0.50、0.75和1.00 mg/kg)对大鳞副泥鳅(Paramisgurnus dabryanus)生长和性腺分化的影响。结果显示:药物处理对大鳞副泥鳅成活率无显著影响;短期内(60 d)17β-雌二醇能显著促进大鳞副泥鳅的生长,其中低浓度(0.25 mg/kg)作用效果最明显;投喂60 d后,各浓度组的雌性比例(66.11%、71.67%、72.78%和71.11%)均明显高于对照组(56.67%),其中以0.75mg/kg组雌性比例最高。结果表明17β-雌二醇能促进大鳞副泥鳅未分化性腺向卵巢发育。

Growth and gonadal differentiation of Paramisgurnus dabryanus were observed with the diets adding different concentrations of 17β-Estradiol （0.25, 0.50, 0.75 and 1.00 mg/kg） in short period （60 days）.The results showed that there were no significant difference in survival rate in different 17β-Estradiol levels.During the experiment time, the 17β-Estradiol could promote the growth of P.dabryanus, especially in the low concentration （ 0.25 mg/kg ） .Furthermore, the female P.dabryanus in the treatment group （66.11%, 71.67%, 72.78% and 71.11%） were signifi-cantly higher than the control group （56.67%）, and the group of 0.75 mg/kg had the highest percentage of female.The results suggested that the 17β-Estradiol promoted the feminization of indifferent gonad in P.dabryanus.