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| Acute and Chronic Toxicity of RH-5849 to Daphnia magna |
| Received:June 26, 2014 |
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| KeyWord:RH5849;Daphnia magna;acute toxicity;chronic toxicity;breeding |
| Author Name | Affiliation | E-mail | | ZHU Yu-xuan | Key Laboratory of Pesticide Environmental Assessment and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China
Ministry of Agriculture, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China | | | JIANG Jin-lin | Key Laboratory of Pesticide Environmental Assessment and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China | jjl@nies.org | | SHAN Zheng-jun | Key Laboratory of Pesticide Environmental Assessment and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China | | | BU Yuan-qing | Key Laboratory of Pesticide Environmental Assessment and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China | | | XU Wei-li | Key Laboratory of Pesticide Environmental Assessment and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China | | | CHENG Yan | Key Laboratory of Pesticide Environmental Assessment and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China | |
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| Abstract: |
| In the present study, 21% RH-5849 wettable powder was selected to assess the acute toxicity to Daphnia magna and the chronic effects on the growth and reproduction of Daphnia magna after 21 d exposure. The acute toxicity test showed that 21% RH-5849 wettable powder had high acute toxicity against Daphnia magna and 48 h-EC50 was 0.94 mg·L-1. The 21% RH-5849 wettable powder also had significant chronic impacts on the first molting time, the number of molting, offspring number and brood number of Daphnia magna. Exposure to RH-5849 at the concentration of 0.135 mg·L-1 significantly lowered the number of molting, the number of total offsprings and broods per female of Daphnia magna. The 21 d non-observed effect concentration(NOEC) of the 21% RH-5849 wettable powder against the reproduction of Daphnia magna was 0.045 mg·L-1. In addition, exposure to RH-5849 at the concentration of 0.015 mg·L-1 significantly reduced the body length of the female. This study demonstrates that RH-5849 has inhibiting effects on the growth and reproduction of Daphnia magna. |
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