THE ROLE OF ALLOCHTHONOUS COMMERCIAL PROBIOTIC BACILLI FOR RAISING DURABILITY OF COMMON CARP (Cyprinus carpio)

摘要

Probiotics is fast being recognized as an alternative therapy for health management, considering the encouraged restriction on antibiotics and the limitations of vaccination and chemotherapy. Optimization of zootechnical, nutritional and microbiological factors can reduce the heavy mortalities and promote the growth performance during. The bacterial flora in the larval gut originates from bacteria associated with the eggs, the water in the rearing tanks, and the live food (Ring0 and Birkbeck 1999). The positive effect of probiotics depends on both the action mechanisms and the capacity of colonisation, that is to say, its ability to reach, remain, or reproduce in the place where the effect is required (Planas et al., 2004). Probiotics might be usedin two ways in aquaculture: by introducing a specific bacterial flora to the digestive system of the fish via the diet, or by inoculating the beneficial bacterial flora into the rearing water. Though probiotic are widely used in animal husbandry, littlehas been done to incorporate them into aquaculture (Lara-flores et al., 2003). However, this study wse designed to evaluate the use of blend of five species of bacillii, Bacillus licheniformisi, B. subtilis, B. polymyxa, B. laterosporus and B. circulansas Allochthonous commercial probiotic supplements in diets of Cyprinus carpio larvae for promoting resistance in challenge with some stress.