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DDT对多刺裸腹溞的急性毒性和生命表参数的影响

刘晓波1,2;席贻龙1;王金霞1;胡柯1   

  1. 1安徽师范大学生命科学学院重要生物资源的保护和利用研究安徽省重
    点实验室, 安徽芜湖 241000;2巢湖学院, 安徽巢湖 238000
  • 收稿日期:2007-10-10 修回日期:1900-01-01 出版日期:2008-06-20 发布日期:2008-06-20

Acute toxicity of DDT and its effects on life table demography of Moina macrocopa.

LIU Xiao-bo1,2;XI Yi-long1;WANG Jin-xia1;HU Ke1   

  1. 1Provincial Key Laboratory of Biotic Environment & Ecological Safety, College of Life Science, Anhui Normal University, Wuhu 241000, Anhui, China; 2Chaohu College, Chaohu 238000, Anhui, China
  • Received:2007-10-10 Revised:1900-01-01 Online:2008-06-20 Published:2008-06-20

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(rm)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rm.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,rm是较敏感的指标.

关键词: 复羽叶栾树, 种子萌发, 聚乙二醇, 外源钙, 干旱胁迫

Abstract: 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 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 (rm) (P<0.05). The rm 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 used to monitor the ecological effects of sublethal concentrations of DDT, rm could be a sensitive indicator.

Key words: Koelreuteria paniculata, seed germination, polyethylene glycol, exogenous Ca2+, drought stress.