Toxic Effects of Bis(Tributyltin) Oxide on Calanoid Copepod (Schmakeria poplesia) under Different Environmental Conditions
不同环境条件下三丁基氧化锡对火腿许水蚤(Schmakeria poplesia)的毒性效应

A series of acute toxicity tests on thirty-day aged Schmakeria poplesia were used to study the effects of bis(tributyltin) oxide (TBTO) under different environmental conditions,such as temperature,salinity,algae concentration and copepod density.The results indicated that 96 h-LC50 values of TBTO for the male and female were 0.41 and 0.42 μg·L-1,respectively.The toxicity of TBTO increased with temperature rising.The mortality of TBTO to copepods was lower at salinity of 25 than that at salinity of 15 and 35.The sensitivity of copepods to TBTO was reduced with the algae concentration increasing.In addition,densities affected the sensitivity of copepod exposed to TBTO.These results showed that environmental conditions influenced the toxicity of contaminations to copepods.Therefore,the eco-toxicity tests should be conducted considering the realistic environmental conditions to get a credible conclusion in ecological risk assessment.