Comparison for Using Two Types of Digestive Enzymes with Fish Powder in the Diets of Common CarpL. Cyprinus Carpioand its Effect on Growth and Blood Traits

Abstract

The study was conducted in the Fish Laboratory / College of Agriculture / Tikrit University to investigate the effect of using prepared fish waste powder supplemented with phytase and pepsin at rates of 1% and 2% on the growth rates and the biochemical characteristics of the blood. 80 cuffs were distributed with a starting weight of 250 ± 1.70 g / fish randomly. Repeat for each treatment at a rate of 5 fish per replicator on 16 glass tanks. The feed containing fishmeal was prepared, chemical analyzes were carried out, and it was used to feed common carp. Treatment T3 recorded the highest rates of weight gain of 96.77 g, daily growth of 1.88 g / day, relative growth of 51.59%, specific growth of 0.29 g / day, and efficiency of food conversion of 55.39% compared to the rest of the treatments, and significant differences were recorded at the level of (P≤0.05)  between the different experimental treatments. A positive improvement was observed in the blood parameters, as it included (total protein, albumin, globulin) in the experimental treatments that were supported by enzymes. On the other hand, the values ​​of serum enzymes (ALT, AST and ALP) decreased varying between the treatments with significant differences between all treatments at the level of (P≤0.05) in addition to the lower levels of cholesterol and triglycerides in the experimental treatments compared to the control treatment, and this is a good evidence of the health of the experimental fish and that they are not exposed to stress or pathological injuries.From this research, we conclude from this research the possibility of using prepared fish waste powder with phytase and pepsin at rates of 1% and 2% as a source of animal protein in the diets of common carp without negative effects on nutrition efficiency, growth rates, and biochemical blood characteristics.