黄鳝血清睾酮和雌二醇含量周年变化规律的研究

黄鳝血清睾酮和雌二醇含量周年变化规律的研究 THE ANNUAL CYCLE OF SERUM ESTRADIOL AND TESTOSTERONE IN SPONTANEOUS SEX-REVERSING FISH MONOPTERUS ALBUS （ZUIEW） 宋平 Song Ping 1 2 3 first-author 熊全沫 Xiong Quanmo 1 2 3 武汉大学生物系 武汉大学生物系 Department of Biology, Wuhan University Department of Biology, Wuhan University 武汉大学生物系,武汉 武汉大学生物系,武汉 ,430072 ,430072 本研究采用放射免疫分析法,测定了311条黄鳝的血清性类固醇激素含量,其结果:雌、雄黄鳝**血清雌二醇（简称E 2 ）周年变化规律相关性明显（r=0.9594,p < 0.01）,均在5月份和10月份形成波峰。雌、雄黄鳝间血清睾酮（简称T）周年变化规律除3和4月份外相关性明显（r=0.7881,p < 0.02）。同时还探讨了血清E 2 含量与卵黄发生、血清T含量与精子发生和血清T含量与性反转的关系。 Level of serum E 2 （estradiol） in adult female Momopterus albus rose rapidly to the highest levle （2047.3±1668.9pg/mL） a month before spawing season; the average level of E 2 in spawing season （June to August） was about 218.5±72.0pg/mL, dropping to the lowest level a month after spawing,but there was slight increase in October and November. A positive correlation （r=0.9594, P < 0.01） was found in profile of serum E 2 between male and female. Level of serum T （testosterone） in adult female increased to 802.14±553.8pg/mL in April, declining to 489.0±176.8pg/mL in May. The level of T was 753.1±97.7pg/mL in June and July. It fell significantly to 183.0±53.4pg/mL in August. There was a slight peak level of T in October. A positive correlation （r=0.7881, p < 0.02） was found in serum T profiles between male and female. Significant increase of serum E 2 was in according with vitellogenesis a month before spawning season. Decline in E 2 level during spawning season indicated viteUogenesis completion. In males, increasing sharply in T level paralleled closely with spermatogenesis in the testes two month before spawning season, during the spawning season, high level of T coincided with spermatogenesis completion and sex behavious, respectively. In the females, annual reproductive cycle especially in Marth, April and October, high levels of serum T were correlated with the development of testicular tissues in the female’s gonad. 黄鳝 性反转 周年变化 雌二醇 睾酮 Monopterus albus （Zuiew） sex reversal annual profile estradiol testosterone Q954 国家自然科学基金(61672102) 1993-02-01 2021-04-01 2