BackgroundThe objective of the present study was to determine the optimum dosage of probiotic in the diet of keureling fish (
Tor tambra) fry.
MethodsLactobacillus casei from Yakult® was used as a starter, and enhanced with
Curcuma xanthorrhiza,
Kaempferia galanga and molasses. The mixture was fermented for 7 days prior to use as probiotic in a formulated diet containing 30% crude protein. Four levels of probiotic dosage; 0 ml kg
-1 (control), 5 ml kg
-1, 10 ml kg
-1 and 15 ml kg
-1 were tested in this study. The fish was fed twice a day at 08.00 AM and 06.00 PM at the ration of 5% body weight for 80 days.
ResultsThe results showed that growth performance and feed efficiency increased with increasing probiotic dosage in the diet from control (no probiotic) to 10 ml kg
-1 of probiotic dosage and then decreased when the dosage was increased up to 15 ml kg
-1.
ConclusionsThe best values for all measured parameters were recorded at the dosage of 10 ml kg
-1. Therefore, it was concluded that the optimum dosage of enhanced probiotic for
T. tambra fry was 10 ml kg
-1 of feed.
