Study on heavy metal Zn on some physiological indces in Juvenile of Silver Carp (Hypophthalmichthys molitrix)

In this study, in order to investigation of acute toxicity heavy metal Znic on blood parameters ofJuvenileof Silver carp (Hypophthalmicthys molitrix), a total of 270 Juvenilefish with weight mean 51.6±8.1 gr and length mean 17.1±2 cm were exposed to 0, 5 and 10 mg/L of Zn (NO3)2 in Higher Educational Complex of Saravan during Desember 2017 to February 2018. Fish sampling was performed at 12, 24, 48, 72 and 96 hours. The results show that, hematocrite (Hct) in treatments 5 and 10 mg/lit showed significant difference with control (p<0.05). But hemoglobin (Hb) levels showed no significant difference (p>0.05). The result of differential count of leukocyte showed significant difference in 96 hrs (p<0.05). And these two treatments showed significant difference in white Blood Cells (WBC) with control. The number of red blood cells (RBC) showed significant difference in 12 and 96 hrs. These two treatments have shown a significant difference in number of red blood cells. Total protein in 5 and 10 treatments showed significant difference with control. The level of cholesterol in 10 mg/L treatment showed significant difference with 5 and control treatments (p<0.05). The level of albumin and triglyceride showed significant difference at 3 treatments but level of glucose showed no significant difference (p>0.05). According to the results, blood parameters and biochemical factors are sensitive factors in monitoring the toxicity and the stress caused by zinc particularly in acute concentrations.