Effects of dietary L-carnitine supplementation on growth performance and survival rate in common carp (Cyprinus carpio Linneaus 1758)

The aim of present study (60 days) was to evaluate the effect of dietary L-carnitine on growth performance and survival rate of Common Carp (Cyprinus carpio) via supplementation with Biomar. According to body length and weight, 180 common carp (average weight 13.21±2.5g) were divided into 4 groups (three replicates for each group). The L-carnitine was used in three concentrations 500 (T1), 1500 (T2) and 2500 (T3) mg/Kg-1 of diet (Biomar). The common carp in experimental treatments were fed of the three levels of L-carnitine with 5 percent body weight (3 times a day). The fish in control treatment was fed on not supplemented Biomar. The growth factors of fishes fed on L-carnitine were compared to those fishes in control treatment that fed of unsupplemented Biomar. The results clearly showed that animal fed the L-carnitine had significantly increased final body weight in comparison to control treatment. The maximum of final body weight (FBW) and Specific growth rate (SGR) were observed in treatment of T3 (P>0.05) followed by T2. There were no significantly different between T1 and control group in this compare (P>0.05) however T1 showed better result in grow performance than control group. Also in survival rate the treatments had no significantly different to each other (P>0.05)