Toxicity effect of Triadimefon based on Oryzias latipes and Daphnia magna with different test endpoints
LIU Na1, JIN Xiao-wei2, WANG Ye-yao1,2, ZHANG Ling-song3, LV Yi-bing2, YANG Qi1
1. School of Water Resources and Environment, China University of Geosciences Beijing, Beijing 100083;
2. China National Environmental Monitoring Center, Beijing 100012;
3. State Key Laboratory for Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Triadimefon is one of the most widely used broad spectrum bactericides at the present. Although the acute toxicity of triadimefon is lower, it would accumulate persistently in the water environment and cause adverse effect to aquatic organisms due to its consistency and adsorption. Sub-chronic toxicity of different endpoints for Oryzias latipes and Daphnia magna were conducted to evaluate aquatic ecological effect of triadimefon. The result showed that the NOECs of triadimefon based on the survival, growth and reproductive of Oryzias latipes were 76, 60, 10μg/L respectively. While the NOECs based on the molt, growth and reproductive of Daphnia magna were 25, 100, 200μg/L, respectively. Oryzias latipes was more sensitive than Daphnia magna to triadimefon. For the view of different endpoints, reproduction was the most sensitive endpoint of Oryzias latipes to triadimefon, followed as growth and survival. For Daphnia magna, the growth and molt were more sensitive than reproduction. Therefore, it would cause reproductive fitness to aquatic organisms under low dose long-term exposure of triadimefon. Different endpoints for kinds of species, especially for reproductive toxicity of fish should be considered in the ecological risk assessment of triadimefon.
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LIU Na, JIN Xiao-wei, WANG Ye-yao, ZHANG Ling-song, LV Yi-bing, YANG Qi. Toxicity effect of Triadimefon based on Oryzias latipes and Daphnia magna with different test endpoints. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(7): 2205-2211.
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