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作 者 ：刘晓波^1,2;席贻龙¹;王金霞¹;胡柯¹

期 刊 ：应用生态学报 2008年 19卷 06期 页码：1343-1348

摘 要 ：采用48 h急性毒性试验研究了DDT对多刺裸腹溞的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40 μg·L^-1）DDT溶液中的多刺裸腹溞的生
命表统计学参数.结果表明：DDT对多刺裸腹溞48小时LC₅₀值为324 μg·L^-1；浓度在1～40 μg·L^-1的 DDT对多刺裸腹溞的生命期望、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(r_m)影响显著 (P<0.05).与空白对照组相比，浓度为8、16和40 μg·L^-1的DDT显著地提高了多刺裸腹溞种群r_m.在使用多刺裸腹溞的生命表统计学参数监测亚致死浓度的DDT的生态影响时，r_m是较敏感的指标.

Abstract:The 48 h LC₅₀ of DDT to Moina macrocopa was determined by acute toxici
ty 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 48 h LC₅₀ 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 (r_m) (P<0.05). The r_m of M. macrocopa increased markedly at 8, 16 and 40 μg·L^-1 of DDT, compared with the blank control, indicating that when the life table demography of M. macrocopa was u
sed to monitor the ecological effects of sublethal concentrations of DDT, r_m could be a sensitive indicator.

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