Effects of bifenthrin on Daphnia magna during chronic toxicity test and the recovery test

作     者：YEWei-hong WENYue-zhong LIUWei-ping WANGZhong-qiang 

作者机构：InstituteofEnvironmentalSciencesZhejiangUniversityHangzhou310029China InstituteofFeedScienceZhejiangUniversityHangzhou310029China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2004年第16卷第5期

页      面：843-846页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 082803[工学-农业生物环境与能源工程] 07[理学] 08[工学] 0828[工学-农业工程] 09[农学] 0903[农学-农业资源与环境] 0713[理学-生态学] 

基　　金：TheNationalNaturalScienceFoundationforDistinguishedYoungScholarsofChina(No .2 0 2 2 572 1 ) 

主　　题：bifenthrin Daphnia magna parental generation(F 0) F 1(1st) and F 1(3rd) recovery test toxic test 

摘      要：The acute and chronic toxic effects of bifenthrin on Daphnia magna were studied. The results showed that 24 h-EC 50 , 48 h-LC 50 and 96 h-LC 50 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(F 0 generation) were exposed during 21 d to different bifenthrin concentrations. Offspring(animals from the first and third brood: F 1(1st) and F 1(3rd), respectively) were transferred to a free pesticide medium during a 21 d 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 F 1(1st) generation daphnids from parentals(F 0) exposed to the bifenthrin. However F 1(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 F 1(3rd) from parentals exposed to the 0.5 and 0.75 μg/L bifenthrin concentration was still significantly effected(P0.05).