润滑油对蒙古裸腹溞的急慢性毒性效应

为了解石油烃污染对水生生物生长、繁殖和发育的影响，采用实验生态学方法研究了润滑油对蒙古裸腹溞Moina mongolica的急性毒性和慢性毒性。结果表明:润滑油对蒙古裸腹溞的24 h LC₅₀、48 h LC₅₀、72 h LC₅₀和96 h LC₅₀分别为7.98 mg/L、5.81 mg/L、4.99 mg/L和3.04 mg/L，安全浓度为0.92 mg/L。润滑油浓度18 mg/L时，蒙古裸腹溞的存活时间最短、存活率最低，但在其他试验浓度下没有明显的变化规律，其种群增长参数也没有体现出明显的变化规律，说明润滑油对蒙古裸腹溞毒性相对较弱。

Acute and chronic toxicity of lubricating oil to water fleas Moina mongolica

To understand the effects of petroleum hydrocarbon pollution on growth, reproduction and development of aquatic organisms, the acute and chronic toxicities of lubricating oil to water fleas Moina mongolica were studied under conditions of lubricating oil pollution.The results showed that the LC₅₀ was found to be 7.98 mg/L in 24 h, in 5.81 mg/L in 48 h, 4.99 mg/L in 72 h, and 3.04 mg/L in 96 h, with safe concentration of 0.92 mg/L.The chronic toxicity test revealed that the minimal survival time and survival rate were observed in the water fleas exposed to lubricating oil at a dose of 18 mg/L.However, there was no significant change in reproduction and population increase parameters of the water fleas in the test concentrations, indicating that the low concentration of lubricating oil has relatively weak toxicity to the water fleas.