摘要 为了解石油烃污染对水域环境中枝角类生长、繁殖和发育的影响,进行了0#柴油对蒙古裸腹溞Moina mongolica的急性毒性和慢性毒性试验。结果表明:0#柴油对蒙古裸腹溞的24 h LC50和48 h LC50分别为2.00、0.09mg/L,安全浓度为5.47×10-5mg/L;在不同柴油浓度下,蒙古裸腹溞的存活时间、第1次产幼时间及数量、单个母溞的产幼总数及总胎数整体上均呈现出随浓度的升高而减小的趋势;在柴油浓度为0、1×10-5mg/L低浓度试验组中,蒙古裸腹溞的内禀增长率、周限增长率、平均世代时间和净生殖率等指标相对较高,在高浓度试验组中相对较低,整体上这些指标呈现出随柴油浓度的升高而降低的趋势。
Abstract: The acute and chronic toxicities of 0#diesel oil to water fleas Moina mongolica were studied to understand the growth,reproduction and development of Cladocera in oil pollution water.The results showed that the 24 h LC50and 48 h LC50were 2.00 mg/L and 0.09 mg/L,respectively,with safe concentration of5.47×10-5mg/L. The chronic toxicity test revealed that the water fleas showed decrease in survival time,first brood time and number,number of offspring per adult and number of brood as increase in concentration of 0#diesel oil.The intrinsic rate of increase(rm),finite rate of increase(λ),generation time(T)and net reproductive rate(R0)of the water fleaswere higher in 0 and 1×10-5mg/L than those in other higher oil concentrations.The findings indicated that those indices were increased with the elevated concentration of 0#diesel oil.
2015, Vol. 30 
