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Responses and recovery pattern of sex steroid hormones in testis of Nile tilapia (Oreochromis niloticus) exposed to sublethal concentration of methomyl

文献类型： 外文期刊

作者： Meng, Shun Long 1 ; Qiu, Li Ping 1 ; Hu, Geng Dong 1 ; Fan, Li Min 1 ; Song, Chao 1 ; Zheng, Yao 1 ; Wu, Wei 1 ; Qu, Jian 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Wuxi 214081, Peoples R China

2.Minist Agr, Lab Qual & Safety Risk Assessment Aquat Prod Envi, Wuxi 214081, Peoples R China

3.CAFS, Key Lab Fishery Ecoenvironm Assessment & Resource, Wuxi 214081, Peoples R China

关键词： Methomyl; Testis; Tilapia; Sex steroid hormone; Recovery pattern

期刊名称：ECOTOXICOLOGY （ 影响因子：2.823； 五年影响因子：2.958 ）

ISSN： 0963-9292

年卷期： 2016 年 25 卷 10 期

页码：

收录情况： SCI

摘要： Tilapia were exposed to sublethal methomyl concentrations of 0, 0.2, 2, 20 or 200 mu g/L for 30 days, and then transferred to methomyl-free water for 18 days. The sexual steroid hormones 17 beta-estradiol (E2), testosterone (T), and 11-ketotestosterone (11-KT) in tilapia testes were examined at 0, 6, 12, 18, 24 and 30 days after methomyl exposure, and at 18 days after fish were transferred to methomyl-free water. There were no significant changes in the hormone parameters in testes of tilapia exposed to low concentration 0.2 and 2 mu g/L methomyl compared with the controls. However, high concentration 20 and 200 mu g/L methomyl had the potential to disrupt the endocrine system of male tilapia, as shown by an increase in E-2 and a decrease in T and 11-KT in the testes. Thus, it would appear that the 2 mu g/L methomyl might be considered the no-observed-adverse-effect level. Recovery data showed that the effects produced by the lower concentration of 20 mu g/L were reversible but the effects were not reversible at the higher concentration of 200 mu g/L.

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