Acute toxicity and accumulation test of Deltamethrin on Penaeus japonicas

Series of experiments were performed to determine the acute toxicity and the accumulation of Deltamethrin to Penaeus japonicas by the semi-static test method.In addition,behavioral changes at each deltamethrin concentration were determined for the individuals.The results showed that the 24h,48h,72h,96h LC50 value of Deltamethrin was 0.00090mg/L,0.00050mg/L,0.00019mg/L and 0.00012mg/L,resp.The safe-concentrations in 96h of Deltamethrin was 0.046μg/L.During the accumulation test,it showed that the concentration of deltamethrin in water and in vivo accumulation of deltamethrin in shrimp was adversely related.