Objective:To determine toxicity and safety margins of trichlorofon in different species as trichlorofon toxicity has a large variation in the susceptibility of different species.Methods:In this research,four viviparou...Objective:To determine toxicity and safety margins of trichlorofon in different species as trichlorofon toxicity has a large variation in the susceptibility of different species.Methods:In this research,four viviparous aquarium fish were exposed to trichlorofon for 96 h.LC_(50)of 24 h,48 h,72 h and 96 h were attained by probit analysis software SPSS Version 16.Fish samples were exposed to different concentrations of trichlorofon(5,10,20 and 40 mg/L)for 96 h and mortality were recorded,separately.Results:The 96 h LC_(50)of Poecilia latipinna,Poecilia reticulata a,Gambusia holbrooki and Xiphophorus helleri were 9.80,9.80,9.95 and 7.99 mg/L,respectively.Conclusions:According to the results of this research,LC_(50)values indicated Xiphophorus helleri was the most resistant and Gambusia holbrooki,with a few differences,was the most sensitive species compared with the fishes examined.展开更多
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 Science and Natural Resource(Grant No.6177515-5).
文摘Objective:To determine toxicity and safety margins of trichlorofon in different species as trichlorofon toxicity has a large variation in the susceptibility of different species.Methods:In this research,four viviparous aquarium fish were exposed to trichlorofon for 96 h.LC_(50)of 24 h,48 h,72 h and 96 h were attained by probit analysis software SPSS Version 16.Fish samples were exposed to different concentrations of trichlorofon(5,10,20 and 40 mg/L)for 96 h and mortality were recorded,separately.Results:The 96 h LC_(50)of Poecilia latipinna,Poecilia reticulata a,Gambusia holbrooki and Xiphophorus helleri were 9.80,9.80,9.95 and 7.99 mg/L,respectively.Conclusions:According to the results of this research,LC_(50)values indicated Xiphophorus helleri was the most resistant and Gambusia holbrooki,with a few differences,was the most sensitive species compared with the fishes examined.
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.
