Acute toxicity of boron to juvenile white shrimp, Litopenaeus vannamei, at two salinities

Acute toxicity of boron to the white shrimp, Litopenaeus vannamei, was tested at ambient salinities of 3.0 and 20.0 parts per thousand using a static renewal method, respectively. The results showed that the mean LC50 values of boron at 24, 48, 72 and 96 h were 552.55, 153.35, 50.14, 25.05 mg/L to the shrimp at 3.0 parts per thousand, and were 598.13, 219.52, 147.80, 80.06 mg/L at 20.0 parts per thousand. The LC50 values of boron to L. vannamei at 3.0 parts per thousand were significantly lower than these to shrimp at 20.0%. at 48, 72 and 96 h exposure, and the statistic P values were 0.013, 0.000 and 0.000, respectively, indicating that L. vannamei at low salinity is more sensitive to the ambient boron toxicity. (C) 2008 Elsevier B.V. All rights reserved.