Effects of dietary nucleotide on some growth indices and proximate analysis of common carp (Cyprinus carpio).

Effect of different levels of dietary nucleotide was studied on growth indices and proximate analysis of common carp with average weight 7.54 ± 0.2 during 8 weeks. This experiment was carried out in 300 L circular tanks with 20 fish per tank at the Aquaculture unit, School of Natural Resources, TMU. Dietary nucleotide was added to the diet at a rate of 0, 0.2, 0.3, and 0.4 percent. Fish were fed 5 times daily at a rate of 4-7% body weight. After 56 days of feeding, results showed that dietary supplementation of nucleotide had significant effect on condition factor (P<0.05), but not on final weight, feed conversion ratio, weight gain, and survival (P>0.05). Analysis of proximate composition showed no significant differences in ash, moisture, and protein content (P>0.05). The highest fat content was observed in fish fed 0.2% nucleotide (P<0.05). The results of this study showed that supplement of 0. 2% of nucleotide has positive effect on growth and proximate composition in this species.