水生生物学报2018，Vol.42Issue(1)：155-161,7.DOI:10.7541/2018.020
环境激素睾丸酮和雌二醇对卜氏晶囊轮虫繁殖影响
EFFECTS OF ENVIRONMENTAL HORMONES TESTOSTERONE AND ESTRADIOL ON REPRODUCTION OF FRESHWATER ROTIFER ASPLANCHNA BRIGHTWELLI
摘要
Abstract
The effects of testosterone, estradiol and the combination of the two hormones on the main development stages and population growth rate of Asplanchna brightwelli were studied with ecological experiment methods. The resu-lts showed that the 48h LC50 of testosterone (T) was 9.56 mg/L, Y=1.9793X+3.0591 (R2=0.9211); 48h LC50 of estradiol (E) was 8.18 mg/L, Y=3.5292X+1.7788 (R2=0.9195). Testosterone and estradiol significantly reduced the lifespan, the number of offspring, and population growth rate (r) except the condition under the concentration of 0.5 mg/L. Treat-ment with testosterone at the concentration of 8 mg/L significantly prolonged the pre-reproductive time by 11.71％, and decreased the lifespan and the number of offspring by 52.22％ and 82.20％, respectively. Treatment with estradiol at the concentration of 8 mg/L significantly prolonged the pre-reproductive time by 7.10％, and decreased the lifespan and the number of offspring by 49.75％ and 83.33％, respectively. When the two hormones were at a total concentration of 8 mg/L, compared with the control groups, the pre-reproductive period significantly prolonged by 34.17％—48.01％; the mean life significantly shortened by 31.56％—42.12％; the number of offspring reduced by 24.44％—80.33％. At the 5d, the population growth rate of rotifers significantly declined by 30.00％, 37.14％, 41.43％, 60.00％ and 65.71％ when they were exposed to T6E2, T4E4, T8E0, T0E8 and T2E6, respectively. Consequently, testosterone and estradiol showed significant effects on the durations of different development stages of Asplanchna brightwelli and the characteristics of its population growth. Simultaneously, the two hormones showed synergistic effects and the rotifers were more sensi-tive to estradiol.关键词
睾丸酮/雌二醇/卜氏晶囊轮虫/生殖前期/平均寿命/种群增长率Key words
Testosterone/Estradiol/Asplanchna brightwelli/Pre-reproductive period/Mean life span/Population growth rate分类
生物科学引用本文复制引用
刘露露,卢绪鑫,叶天韵,金司晨,闵元棋,韩亚杰,杨家新..环境激素睾丸酮和雌二醇对卜氏晶囊轮虫繁殖影响[J].水生生物学报,2018,42(1):155-161,7.基金项目
国家自然科学基金(31272388) （31272388）
江苏省水产三新工程项目(Y2014-32)资助 [Supported by the National Natural Science Foundation of China (31272388) （Y2014-32）
Three Term Project of Aquiculture of Jiangsu Province, China (Y2014-32)] （Y2014-32）
