Objective:To determine the acute toxicity of trichlorophon(an organ phosphorus compound used in agricultural fields and a common disinfectant used for fish diseases)towards two ornamental fish Systomus tetrazona and H...Objective:To determine the acute toxicity of trichlorophon(an organ phosphorus compound used in agricultural fields and a common disinfectant used for fish diseases)towards two ornamental fish Systomus tetrazona and Hemigrammus erythrozonus.Methods:In this research,two aquarium fish were exposed to different concentrations of trichlorophon(5,10,20 and 40 mg/L)for 96 h and physicochemical properties of water used for these experiments were stable and every mortality was recorded daily for 96 h.LC_(50) of 24 h,48 h,72 h and 96 h were attained by probit analysis software SPSS version 16.Results:The 96-h LC_(50) of trichlorophon for Systomus tetrazona and Hemigrammus erythrozonus were 8.74 and 8.88 mg/L,respectively.Conclusions:Eventually,toxicity values indicated that trichlorophon has the same toxicity towards the studied species and the lower value of LC_(50) for studied species in comparison with that of most species can be stated.展开更多
基金Supported by the Gorgan University of Agriculture&Natural Resource.
文摘Objective:To determine the acute toxicity of trichlorophon(an organ phosphorus compound used in agricultural fields and a common disinfectant used for fish diseases)towards two ornamental fish Systomus tetrazona and Hemigrammus erythrozonus.Methods:In this research,two aquarium fish were exposed to different concentrations of trichlorophon(5,10,20 and 40 mg/L)for 96 h and physicochemical properties of water used for these experiments were stable and every mortality was recorded daily for 96 h.LC_(50) of 24 h,48 h,72 h and 96 h were attained by probit analysis software SPSS version 16.Results:The 96-h LC_(50) of trichlorophon for Systomus tetrazona and Hemigrammus erythrozonus were 8.74 and 8.88 mg/L,respectively.Conclusions:Eventually,toxicity values indicated that trichlorophon has the same toxicity towards the studied species and the lower value of LC_(50) for studied species in comparison with that of most species can be stated.
