Acute Toxicity of Malathion on Daphnia magna Straus, 1820
2005
Serap Saler | Naim Saglam
The purpose of this study was to determine the acute toxicity and effect of malathion on Daphnia magna which was used as test animals. Daphnids were exposed for 96 h to malathion concentrations ranging from 0.001-4 ppm and death daphnids were counted 24, 36, 48, 72 and 96 h later under a stero microscope. The values of lethal concentration (LC<SUB>10,50,90</SUB>) and Lethal time (LT<SUB>10,50,90</SUB>) associated 95-99% confidence limits were calculated. Mortality rate between each dosages and mortality rate between 24-96 h depended on time were correlated. LC<SUB>50</SUB> values were changed between 0.740-0.015. LT<SUB>50</SUB> values were found between 110 00<SUP> </SUP>-40 24<SUP> </SUP>. Mortality ratios of Daphnia magna treated with malathion during 96 h period was found significant at 95-99% level (p< 0.001-0.005).
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