Effects of Lactobacillus plantarum and Mannan Oligosaccharide on growth performance and some digestive factors in Oncorhynchus mykiss

Growth and immunity resistance of fish are the most important factors in aquaculture. therefore, many types of research in probiotics, prebiotics, and synbiotics for improving growth and immunity in fish have been studied in the last years.

In this study, effects of Lactobacillus plantarum and MOSon growth performance, digestive enzymes activity and intestine morphology of Oncorhynchus mykiss were studied. Juvenile rainbow trout (n=270) in 6 administration  groups in 18  tanks were kept and fed with diets containing different doses (0.3 and 0.5 g kg-1 feed) of the probiotic,  (2 g kg-1 feed) of prebiotic, (0.3+2 and 0.5+ 2g kg-1 feed of probiotic and prebiotic respectively) and  a control group for 45 days.

Results showed a positive effect on growth performance  and digestive enzymes activity in probiotic (0.3 and 0.5 g kg-1 feed of probiotic) and synbiotic groups  compared to the control group(p<0.05).