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Effect of methomyl on sex steroid hormone and vitellogenin levels in serum of male tilapia (Oreochromis niloticus) and recovery pattern
Tilapia were exposed to sub‐lethal concentrations of 0, 0.2, 2, 20 or 200 μg/L for 30 days, then transferred to methomyl‐free water for 18 days. E 2 , T, 11‐KTand VTG in serum were examined. There were no significant changes in all the parameters in serum of tilapia exposed to 0.2 μg/L and 2 μg/L methomyl compared to the control. However, 20 μg/L and 200 μg/L have the potential to disrupt the endocrine system of male tilapia, as shown by its ability to increase VTG and E 2 and decrease T and 11‐KT in serum. Thus it would appear the no observed adverse effect level for sexual steroid hormones of methomyl is lower than 2 μg/L. Recovery data showed that the effects produced by 20μg/L were reversible but not at 200μg/L. Furthermore, the sensitivity of above parameters to methomyl followed the order of VTG>E 2 >11‐KT>T>GSI, suggesting VTG being the better biomarkers.
Effect of methomyl on sex steroid hormone and vitellogenin levels in serum of male tilapia (Oreochromis niloticus) and recovery pattern
Tilapia were exposed to sub‐lethal concentrations of 0, 0.2, 2, 20 or 200 μg/L for 30 days, then transferred to methomyl‐free water for 18 days. E 2 , T, 11‐KTand VTG in serum were examined. There were no significant changes in all the parameters in serum of tilapia exposed to 0.2 μg/L and 2 μg/L methomyl compared to the control. However, 20 μg/L and 200 μg/L have the potential to disrupt the endocrine system of male tilapia, as shown by its ability to increase VTG and E 2 and decrease T and 11‐KT in serum. Thus it would appear the no observed adverse effect level for sexual steroid hormones of methomyl is lower than 2 μg/L. Recovery data showed that the effects produced by 20μg/L were reversible but not at 200μg/L. Furthermore, the sensitivity of above parameters to methomyl followed the order of VTG>E 2 >11‐KT>T>GSI, suggesting VTG being the better biomarkers.
Effect of methomyl on sex steroid hormone and vitellogenin levels in serum of male tilapia (Oreochromis niloticus) and recovery pattern
Meng, Shun‐Long (Autor:in) / Qiu, Li‐Ping / Hu, Geng‐Dong / Fan, Li‐Min / Song, Chao / Zheng, Yao / Wu, Wei / Qu, Jian‐Hong / Li, Dan‐Dan / Chen, Jia‐Zhang
2017
Aufsatz (Zeitschrift)
Englisch
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