中文摘要：

采用48h急性毒性试验研究了DDT对多刺裸腹潘的48小时LC50值，采用生命表试验方法研究了暴露于不同浓度（1、8、16、24、32和40μg·L^-1）DDT溶液中的多刺裸腹潘的生命表统计学参数．结果表明：DDT对多刺裸腹潘48小时LC50值为324μg·L^-1；浓度在1～40μg·L^-1的DDT对多刺裸腹潘的生命期望、净生殖率、世代时间和总繁殖率均没有显著影响（P〉0．05），但对种群内禀增长率（rm）影响显著（P〈0．05）．与空白对照组相比，浓度为8、16和40μg·L^-1的DDT显著地提高了多刺裸腹潘种群rm．在使用多刺裸腹潘的生命表统计学参数监测亚致死浓度的DDT的生态影响时，rm是较敏感的指标．

英文摘要：

The 48 h LCs0 of DDT to Moina macrocopa was determined by acute toxicity test, and the effects of different concentrations （ 1,8, 16, 24, 32 and 40 μg·L^-1 ） of DDT on the life table demography of M. macrocopa was studied by life table demography. The results showed that the 58 h LCs0 of DDT to M. macrocopa was 324 μg·L^-1.1 -40 μg·L^-1 of DDT had no significant effects on the life expectancy at birth, generation time, net reproductive rate, and gross productive rate of M. macrocopa （P 〉 0. 05）, but significantly affected the intrinsic rate of population increase （rm） （P 〈 0. 05）. The rm ofM. macrocopa increased markedly at 8, 16 and 40 μg·L^-1of DDT, compared with the blank control, indicating that when the life table demography of M. macrocopa was used to monitor the ecological effects of sublethal concentrations of DDT, rm could be a sensitive indicator.