Single and joint toxic effects of five selected pesticides on the early life stages of zebrafish (Denio rerio)

文献类型： 外文期刊

第一作者： Wang, Yanhua

作者： Wang, Yanhua;Lv, Lu;Yang, Guiling;Xu, Zhenlan;Wang, Qiang;Cai, Leiming;Yu, Yijun

作者机构：

关键词： Joint toxicity;Aquatic vertebrates;Phoxim;Ecotoxicology

期刊名称：CHEMOSPHERE （ 影响因子：7.086； 五年影响因子：6.956 ）

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收录情况： SCI

摘要： Instead of individual ones, pesticides are usually detected in water environment as mixtures of contaminants. Laboratory tests were conducted in order to investigate the effects of individual and joint pesticides (phoxim, atrazine, chlorpyrifos, butachlor and X-cyhalothrin) on zebrafish (Denio rerio). Results from 96-h semi-static toxicity test indicated that A-cyhalothrin had the greatest toxicity to the three life stages (embryonic, larval and juvenile stages) of D. rerio with LC50 values ranging from 0.0031 (0.0017-0.0042) to 0.38 (0.21-0.53) mg a.i. L-1, followed by butachlor and chlorpyrifos with LC50 values ranging from 0.45 (0.31-0.59) to 1.93 (1.37-3.55) and from 0.28 (0.13-0.38) to 13.03 (7.54-19.71) mg a.i. respectively. In contrast, atrazine showed the least toxicity with LC50 values ranging from 6.09 (3.34-8.35) to 34.19 (24.42-51.9) mg a.i. L-1. The larval stage of D. rerio was a vulnerable period to most of the selected pesticides in the multiple life stages tested. Pesticide mixtures containing phoxim and lambda-cyhalothrin exerted synergistic effects on the larvae of D. rerio. Moreover, the binary mixture of phoximatrazine also displayed synergistic response to zebrafish. It has been assumed that most chemicals are additive in toxicity. Therefore, it is crucial to clarify the synergistic interaction for pesticide regulators and environment managers. In the present study, our data provided a clear picture on ecological risk of these pesticide mixtures to aquatic organisms. Moreover, joint effects play a more important role than individual ones, which require more attention when defining standard for water environment quality and risk assessment protocols. (C) 2016 Elsevier Ltd. All rights reserved.

分类号： X5

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