Desempenho zootécnico de tilápia Oreochromis niloticus (Chitralada), alimentadas com suplemento probiótico em ambiente confinado

Abstract

Probiotics consisting of live microorganisms capable of colonizing the intestinal tract of the fish have demonstrated effectiveness in reducing diseases caused by pathogenic microorganisms, providing the host by improving its performance to weight ratio and growth. However, the use of probiotic has maximum efficiency when applied to crops in advance. However, the administration after installation of pathogens, and considering too late, this is where many aquaculturists or even technical and academic efforts come in search of adding probiotics efficient post manifestation of diseases. The objective of this study was to evaluate the growth performance of (1) growth, (2) weight and (3) increase in survival rate with the use of probiotics in feed tilapia. The study was developed, making use of the probiotic (SANOLIFE PRO F), specific product and concentrate INVE Aquaculture , mixture of spores of different strains of Bacillus spp in minimum concentration of 1 x 1011 CFU, added to ration of pre - creates and fattening with the use of monosexados juvenile tilapia ( Oreochromis niloticus ), lineage chitralada in confined environment. The fishes initially were fed by commercial ration to 40 % of Brutish Protein (PB) during thirty days maintained in system of supply of constant recirculation of water without use of artificial aeration. Subsequently, in the same condition there was used ration of 32 % of PB with probiótico in thirty days of cultivation. The delineation was completely casualizado, in a total of 200 youthful ones, between 5 and 14g, distributed in 16 experimental pieces when 10 fishes constituted of tanks of PVC with capacity of 250 liters, with two treatments D1 (Density =), and D2 (Density = 15 fishes) and eight repetitions. At the level of signification (P> 5 %) regarding the performance in weight (g), length (cm) and tax of survival did not present significant differences.