Alpha-cypermethrin'in Daphnia manga (Straus 1820) (Cladocera, Crustacea) üzerine akut toksik etkisinin araştırılması
Özet
In this study, median lethal concentrations (LC50 ) of insecticide alpha-cypermethrin on Daphnia magna for 24 hours were determined.Bioassay have been carried out with five different concentrations (0.0001; 0.0004; 0.0007; 0.0010; 0.0013 mg/L); which determined at the end of literatur research. Concentrations applied to Daphnia magna and experiment has been conducted with the method of static bioassay on three series. The period of experiment was 24 hours. As to the LC50 values have been calculated with the method of probit analysis.Results showed that; the concentration of the alpha-cypermethrin which killed 50 % of Daphnia magna was 0.224 µg/L (%95 confidence interval = 0.012 µg/L - 0.358 µg/L) for 24 hours.