Effect of different levels of organic acids mixture on some growth parameters and carcass composition of common carp (Cyprinus carpio) juveniles

This study was carried out to evaluate the effects of different levels of dietary commercial organic acids mixture (Biotronic® Top3) on growth performance and carcass composition of common carp juveniles. Fish with an average weight of 50g were stocked in 12 fiberglass tanks with 15 fish per tank density for 60 days and fed with 0 (control), 1, 2 and 3% of dietary organic acids mixture. Results showed that the highest body weight was observed in 3% treatment (144.8±1.36 g) and the lowest value was related to the control treatment. However, the highest feed conversion ratio was obtained in the control (2.78±0.05) and the lowest value was observed in the 3% treatment (2.2±0.07). The highest specific growth rate was observed in 3% treatment (1.41±0.11%) and the lowest value was related to the control treatment (0.85±0.02%). Also, fish fed with 3% organic acids mixture showed the highest levels of carcass crude protein (18.81±0.32%) and the lowest fat content (3.28±0.14%). According to the results, it seems that the organic acids mixture at level of 3% can be used as a growth promoter and has a positive effect on growth performance, survival rate and carcass quality of common carp.