Abstract:The effects of different concentrations (20, 40, 80, 160, 320 μg/L and 640 μg/L) of aldrin on the life table demography of three successive generations of Moina macrocopa were studied, and the results showed that the aldrin affected significantly all the life table demographic parameters of three successive generations of M. macrocopa. Compared with the blank controls, aldrin at concentrations higher than 80 μg/L decreased life expectancy at birth and net reproduction rate of maternal generation of the cladoceran, and that at concentrations higher than 160 μg/L shortened generation time and decreased intrinsic rate of population growth. Aldrin at concentrations higher than 40 μg/L decreased life expectancy at birth of F1 generation of the cladoceran, that at 20 μg/L and 80-640 μg/L decreased net reproduction rate, that at 320 and 640 μg/L shortened generation time, and that at all the concentrations decreased intrinsic rate of population increase. Aldrin at 160-640 μg/L shortened life expectancy at birth and generation time of F2 generation of the cladoceran, that at 160 and 640 μg/L decreased net reproduction rate, but that at all the concentrations except for 40 and 320 μg/L increased intrinsic rate of population increase. In the rang of experimentally designed aldrin concentrations, all the life table demography of three successive generations of M. macrocopa except for the intrinsic rate of population increase of F2 were curvinearlly correlated with aldrin concentrations. In chronic toxicity tests, the effect of aldrin on the life table demography of M. macrocopa differed with developmental stages and exposed generations of the test animal.