title: [Stepwise behavioral responses of the Japanese medaka under the joint stress of two organophosphorus pesticides].
abstract: In this study, stepwise behavioral responses of Japanese medaka (Oryzias latipes) under the joint stress of two organphosphorus pesticides (Trichlorfon and Parathion) were discussed. BEWs was used to record the data of behavior strength, to analyze behavioral response of Japanese medaka. The differences of the behavioral responses time in 20, 10, 5, land 0.1 TU were: 1.4, 4.8, 6.4, 32.2 and 43.0 h separately, which were significant. And evident difference of the behavioral responses time was not detected in different proportions of the pesticides. The results suggested that the stepwise behavioral responses of Japanese medaka were affected by both chemical concentration and exposure time. But the stepwise behavioral responses in different proportions of two organphosphorus pesticides were almost the same as each other, and the evident difference of the behavioral responses time was not detected. It proved that the toxicity effects of the joint stress of two organphosphorus pesticides on the stepwise behavioral responses of Japanese medaka were simple additivity.
authors.affiliation: College of Life Science, Shandong Normal University, Ji'nan 250014, China. biolyqh@yahoo.com.cn
authors.forename: Yong
authors.initials: Y
authors.lastname: Liu
authors.forename: Rong-shu
authors.initials: RS
authors.lastname: Fu
authors.forename: Zong-ming
authors.initials: ZM
authors.lastname: Ren
mesh_terms: D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects*; D004357:Drug Synergism; D004784:Environmental Monitoring / Q000379:methods*; D007306:Insecticides / Q000633:toxicity; D009943:Organophosphorus Compounds / Q000633:toxicity; D009990:Oryzias / Q000502:physiology*; D010278:Parathion / Q000633:toxicity*; D014236:Trichlorfon / Q000633:toxicity*
chemical_list: D007306:Insecticides; D009943:Organophosphorus Compounds; D010278:Parathion; D014236:Trichlorfon