Effects of bifenthrin on Daphnia magna during chronic toxicity test and the recovery test
  • 【DOI】

    10.3321/j.issn:1001-0742.2004.05.030

  • 【摘要】

    The acute and chronic toxic effects of bifenthrin on Daphnia magna were studied. The results showed that 24 h-EC50, 48 h-LC50 and 96 h-LC50 of bifenthrin on D. magna were 3.24, 12.40 and 1.40 μg/L res... 展开>>The acute and chronic toxic effects of bifenthrin on Daphnia magna were studied. The results showed that 24 h-EC50, 48 h-LC50 and 96 h-LC50 of bifenthrin on D. magna were 3.24, 12.40 and 1.40 μg/L respectively. And the LOEC and NOEC of bifenthrin were 0.02 and 0.004 μg/L respectively. The recovery test of bifenthrin on Daphnia magna was presented. Daphnia magna(F0 generation) were exposed during 21 d to different bifenthrin concentrations. Offspring(animals from the first and third brood: F1(1st) and F1(3rd), respectively) were transferred to a free pesticide medium during a 21-day recovery period. In this recovery study, survival, growth, reproduction(mean total young per female, onset of reproduction and number broods per female) and the intrinsic rate of natural increase (r) were assessed as parameters. Reproduction such as number of young per female as well as length was still reduced in F1(1st) generation daphnids from parentals(F0) exposed to the bifenthrin. However F1(3rd) individuals from parentals exposed to pesticide concentrations were able to restore reproduction when a recovery period of 21 d was allowed, but the length of F1(3rd) from parentals exposed to the 0.5 and 0.75 μg/L bifenthrin concentration was still significantly effected(P<0.05). 收起<<

  • 【作者】

  • 【作者单位】

    Institute of Environmental Sciences/Institute of Feed Science

  • 【刊期】

    环境科学学报(英文版) ISTIC SCI 2004年5期

  • 【关键词】

    bifenthrin  Daphnia magna  parental generation(F0)  F1(1st) and F1(3rd)  recovery test  toxic test 

  • 【基金项目】

    国家自然科学基金