Xiaodan Wang
China
Research Article
Low Salinity Decreases the Tolerance to Two Pesticides, Beta-cypermethrin and Acephate, of White-leg Shrimp, Litopenaeus vannamei
Author(s): Xiaodan Wang, Erchao Li, Zequan Xiong, Ke Chen, Na Yu, Zhenyu Du and Liqiao ChenXiaodan Wang, Erchao Li, Zequan Xiong, Ke Chen, Na Yu, Zhenyu Du and Liqiao Chen
Acute toxic effects of two commonly used pesticides, beta-cypermethrin and Acephate, to the white-leg shrimp, Litopenaeus vannamei, were tested at ambient salinity 5.0% and 20.0%, by using a static renewal method. The results showed that the mean LC50 values of beta-cypermethrin at 24, 48, 72 and 96 h were 0.437, 0.317, 0.203, and 0.170 μg/L to the white shrimp at 5.0%, and were 0.767, 0.440, 0.383, and 0.383 μg/L at 20.0%. The mean LC50 values of Acephate at 24, 48, 72, and 96 h were 51.250, 38.007, 27.783, 18.247 mg/L at 5.0%, and were 59.853, 43.490, 34.220, 27.337 mg/L at 20.0%. L. vannamei is more sensitive to ambient beta-cypermethrin and Acephate toxicity at salinity 5.0% than at salinity 20.0%. Beta-cypermethrin is highly toxic to L. vannamei at either salinity, while acephate has low toxicity to L. vannamei.
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DOI:
10.4172/2155-9546.1000190