Effect of Lead on Some Biochemical Indices of Farmed Silver Carp (Hypophthalmichthys molitrix)

The aim of this study was to evaluate the toxicity effect of lead heavy metal on some serological parameters on Silver Carp in the vicinity with lead for a short term. In order to do this study a total of 135 fish with mean weight of 50±10 gand mean length of 13±1 cm were placed in adjacent to 0, 5 and 10 mg/l of Pb (NO3 )2 in 9 aquariums of 90 liter capacity.Sampling was done randomly each 12 hours for 96 hours from caudal vein of the fishes. The results showed that there was a significant difference in the amount of hemoglobin in 24 hours, between the control and treatments. The level of glucose was increased significantly by increasing the concentration of lead and passing of the time. The levels of triglyceride and albumin did not change significantly (P>0/05). The level of cholesterol increased significantly until 72 hours and after that decreased significantly. Amount of total protein increased significantly by increasing the concentration of lead and time. Based on the results, biochemical parameters are useful for monitoring of lead acute toxicity in Silver Carp.