Journal of Microbial & Biochemical Technology

Effect of a commercial probiotic on the survival of Nile tilapia (Oreochromis niloticus) larvae during the period of yolk sac absorption

Joint Event on 4^th World Congress and Expo on Applied Microbiology & 2^nd International Conference on Food Microbiology

November 29-December 01, 2017 Madrid, Spain

Schocken Iturrino R P, Nascimento T S R, Cardozo M V, Costa G H N, Almeida R and Ávila F A

Sao Paulo State University, Brazil
Imeve Industry Veterinary Medicines, Brazil

Posters & Accepted Abstracts: J Microb Biochem Technol

Abstract:

The action of probiotics is well known in other cultures, but in aquatic environments many tests should still be done, because the relationship between microorganisms, the environment and fish are very intimate. Probiotics should be an alternative to use of antibiotics, and, for aquatic animals are now attracting great attention and many products are available. The objective of the study was to evaluate the effect of a commercial problem on the survival of Nile tilapia larvae (Oreochromis niloticus) during the period of yolk sac absorption. For this, 1500 specimens of tilapia larvae were kept in 15 aquaria with controlled conditions; divided in to 5 treatments, and each treatment had three aquariums with 100 larvae each (n=300). Each treatment was exposed to different levels of inclusion of probiotic in water (0.0, 0.5, 1.0, 1.5 and 2.0 g.L-1) during the period of absorption of the yolk sac. The experiment consisted of five treatments distributed entirely at random and characterized by the different levels of probiotic inclusion in the water (Bacillus subtilis and Bacillus cereus at 4.0 x 1011 CFU/g). Each treatment had three aquariums with 100 larvae each (n=300). Statistically significant difference between the values of the animals exposed to different probiotic levels was detected by ANOVA variance analysis and Tukey test; important difference was taken when p<0.05. The results showed that the survival was higher in larvae treated with 1.5 g.L-1. Thus, it was concluded that this probiotic exerts influence on the survival of Nile tilapia larvae.

Biography :

Schocken Iturrino R P has completed his PhD at Unicamp (1980) and Postdoctoral studies at University of Montreal, Quebec, Canada (1987) and at University of Reading, Reading, England (1990-1992). He is a Titular Professor at Sao Paulo State University and has published more than 200 papers in reputed journals, especially with Clostridium genus, pathogens in general and probiotics.