Effect of different levels of dietary beet molasses on body composition and liver enzymes of common carp (Cyprinus carpio)

In the present study, the effects of different levels of beet molasses on body composition and liver enzymes in common carp were studied. The experiment consisted of 360 pieces of common carp with an average weight of 28±2.5 gr. The fish in 12 reservoirs were randomly distributed to 30 units per reservoir. After one week of adaptation, it was fed for a period of 8 weeks. The experiment was carried out in the form of 4 treatments and each treatment with 3 replications including: Molasses (treatment 1), diet containing 0.5% molasses (treatment 2), diet containing 1% molasses (treatment 3) and diet containing 2% molasses (treatment 4) And fish were fed daily with 3% body weight and twice daily with experimental diets. The food of the control group, the commercial food of the common carp of the company was enriched with no molasses. The results showed that there was no significant difference in the amount of moisture and carcass ash in the control group compared with other treatments (P>0.05). The carcass fat content was significantly different in treatment with 1% molasses and 2% molasses (p < 0.05). The amount of carcass proteins in the treatment of 1% and 2% molasses had a significant difference with control (p < 0.05). The results showed that there was no significant difference in liver enzymes such as lactate dehydrogenase, alanine aminotransferase and aspartate aminotransferase between control and other treatments, but there was a significant difference in alkanin phosphatase levels in control treatment with other treatments (p < 0.05).