Effects of biogenic L-carnitine supplementation on growth performance, survival rate and feed efficiency of monosex Nile tilapia (Oreochromis niloticus L.) fry during the nursery period [electronic resource].

Includes references.

The effects of biogenic L- carnitine were evaluated using diets fed to monosex Nile tilapia (0.niloticus L.) fry (0.27 ± 0.00lg) during a single- stage nursery- rearing system. The basal diet contained 36.7% crude protein. Four dietary treatments contained L- carnitine concentrations of 0, 400, 700 or 1000 mg/kg diet. Dietary treatments were fed at a rate of 10% of the total biomass during (lst and 2nd months) then reduced to 5% of total biomass till end of the experiment (l05- days) and fish were fed 6 days/week (twice daily). Each experimental treatment was represented in two replicate groups. At the end of I5th week of experimental period, body weight of fish fed 1000 mg L- carnitine/kg diet were significantly (P< 0.001) higher compared to the other groups for monosex Nile tilapia O. niloticus fry. However, there were no significant (P> 0.05) differences in body weight among fish fed 0 and 400 mg/kg diet.

Summary in Arabic.

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