Liu Xiao-Bo, Xi Yi-Long, Wang Jin-Xia, Hu Ke
Provincial Key Laboratory of Biotic Environment & Ecological Safety, College of Life Science, Anhui Normal University, Wuhu 241000, Anhui, China.
Ying Yong Sheng Tai Xue Bao. 2008 Jun;19(6):1343-8.
The 48 h LC50 of DDT to Moina macrocopa was determined by acute toxicity test, and the effects of different concentrations (1, 8, 16, 24, 32 and 40 microg x L(-1)) of DDT on the life table demography of M. macrocopa was studied by life table demography. The results showed that the 48 h LC50 of DDT to M. macrocopa was 324 microg x L(-1). 1-40 microg x 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 of M. macrocopa increased markedly at 8, 16 and 40 microg x L(-1) of 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.
通过急性毒性试验测定了滴滴涕对大型溞的48小时半数致死浓度（LC50），并采用生命表统计学方法研究了不同浓度（1、8、16、24、32和40微克·升-1）滴滴涕对大型溞生命表统计学特征的影响。结果表明，滴滴涕对大型溞的48小时LC50为324微克·升-1。1 - 40微克·升-1的滴滴涕对大型溞的出生时预期寿命、世代时间、净生殖率和总生殖率均无显著影响（P > 0.05），但对种群内禀增长率（rm）有显著影响（P < 0.05）。与空白对照相比，在8、16和40微克·升-1的滴滴涕处理下，大型溞的rm显著增加，表明当用大型溞的生命表统计学来监测滴滴涕亚致死浓度的生态效应时，rm可能是一个敏感指标。
