Please Probiotic Bacillus sp. Improved Growth, Survival, and Stress Resistance of Nile tilapia larvae (Oreochromis niloticus Linnaeus,1758)Just Try to Submit This Sample Abstract Irfan Ambas(a*), Dody Dharmawan (a), Trijuno (a), and Rostia (a)
Aquaculture Study Program, Department of Fishery, Faculty of Marine Science and Fisheries, Hasanuddin University, Makassar, Indonesia 90245
Abstract
Probiotics have been widely used in aquaculture, as an alternative to antibiotics and chemicals. This study aimed to determine the effect of probiotics on the growth, survival, and stress resistance of Nile tilapia larvae. This study examined various probiotics as treatments namely Bacillus sp. (B), Lactobacillus sp. Saccharomyces sp. (C), Lactobacillus casei strain Shirota (D), and a control diet (A). Twenty-five g of commercial fish feed was refined and mixed with 0.5 mL of each probiotic, then air-dried. The experimental organisms were 4-day-old larvae (0.019 g and 1 cm). The larvae were stocked into 3 L jars at a density of 15 ind 2 L and then reared for 30 days. During the rearing period, the feed was given at 5% of biomass body weight 3 times per day. The results indicated that the addition of probiotics significantly (P<0.05) improved the growth and survival of the larvae. Of the three types of probiotics, Bacillus sp. (B) showed higher growth and survival compared to other probiotic treatments (C and D). The highest daily specific growth rate (0.161 %/day) and the highest survival rate (66.67%) were found in treatment (B). In addition, the results of the stress resistance test (salinity stress and starvation) tests, showed that Nile tilapia larvae fed a feed containing the probiotic Bacillus sp (B) had a higher stress resistance. In brief, the probiotics evaluated in this study proved to increase growth, survival, and stress resistance, where Bacillus sp. is the best probiotic for tilapia larvae
Keywords: Nile tilapia (Oreochromis niloticus), probiotics, growth, survival, stress resistance
