Dietary effect of celmanax® on growth factor, intestine histology and yersiniosis resistance in rainbow trout (Oncorhynchus mykiss)

This study aims to analyse the effect of complementing the rations of breeding rainbow trout with different concentrations levels of celmanax® prebiotic, which contains Saccharomyces cerevisia associated compounds with Mannan-oligosaccharide on the growth indexes and histologic effects of the prebiotic and the gastrointestinal tract and also measuring of the resistance of breeding fishes fed with this prebiotic in infection to the yersiniosis. Three concentration levels of prebiotic (0, 0.1, 0.5 and 1 %) were mixed into pellets. The fish (19.08±1.45gr) were fed a supplemented commercial diet for 60 days in four treatments and each treatment with three replications. Also, on day 60 of study, the Yersinia ruckeri bacterium was injected empirically into all of our groups. This study’s results showed that complementing rainbow trout rations with different concentrations level of celmanax® (P