Effects of different levels of dietary lysozyme on growth Performance, serum and blood biochemical parameters In common carp (Cyprinus carpio)

This study was conducted to evaluate the effects of lysozyme on dietary supplement scales in some growth factors, hematologic immunity indexes, and serum biochemical parameters in common carp (Cyprinus carpio). For this purpose, 180 pieces of fish were weighed 25.94 ± 0.1 g in 12 tanks and 4 treatments with 3 replications. After the adaptation period, fish were fed with diets containing 0, 0.5, 1 and 1.5 g / kg lysozyme for 8 weeks. At the end of the period, the fish were biometric and blood samples were taken and blood indices were examined. The results of this study showed that this immune stimulant had a positive effect on growth rate of about 26/37 grams and there was a significant difference between treatments (p<0.05). Lysozyme diet showed a significant difference between the number of white blood cells and the control group. There was an increasing trend in the number of hemoglobin in the experimental group. The differential count of white blood cells only showed a significant increase in lymphocyte count between treatments and control. There was a significant difference between treatments and control in neutrophil count. Also, in the study of biochemical parameters of blood, we found that there was a significant difference in all three factors and there was an increasing trend. According to the results of this study, it seems that the use of doses of 1 and 1.5 g / kg of lysozyme may have a beneficial effect on the improvement of blood and biochemical parameters of the serum and the growth of this breeding stock.