عنوان مقاله [English]
In this study, the effects of agricultural pesticide cypermethrin on some hematological indices of silver carp were investigated. At First, the range of concentrations of cypermethrin in order to determine LC50 of silver carp at 24, 48, 72 and 96 hours respectively were determine. Then, according to the LC50 result, another experiment was designed to induce a lethal concentration of this substance to hematological indices of silver carp. In order to analyze the data, software spss analyzer was used. During experiment, none of the control fish were dead. LC50 of Cypermethrin for silver carp was 1.27 ± 0.31. Fish were exposed for 96 hours and tested Cypermethrin significant changes in white and red blood showed an increase in lymphocytes was reduced, but also the hemoglobin, hematocrit, MCH, MCHC, MCV and increased neutrophil (P<0.05). The results indicate that Cypermethrin has an extremely high toxicity to silver carp and as far as possible should prevent the entry of the toxin into aquatic ecosystems.