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      • Open Access Article

        1 - Effects of Lactobacillus plantarum and Mannan Oligosaccharide on growth performance and some digestive factors in Oncorhynchus mykiss
        محمد حامد نجفی انفرادی فلورا محمدی زاده مهدی سلطانی امیر هوشنگ بحری نجمه شیخ زاده
        Inroduction & Objective: 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. More
        Inroduction & Objective: 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. Materials and Methods: 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: 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). Manuscript profile
      • Open Access Article

        2 - The Effects of Using Different Levels of Mannanoligosaccharides on the Performance, Carcass Characteristic and Blood Fat Profile of Broiler Chickens
        M. Afrouzie B. Golizadeh A. Manaf Hossaini
        A complete randomized experiment was conducted to study the effect of different levels of mannanoligosaccharides (0, 1, 2 and 3 g/kg into the basal diets) on growth performance, carcass characteristic and blood lipid profile in broiler chicks. Six hundred one day old Ro More
        A complete randomized experiment was conducted to study the effect of different levels of mannanoligosaccharides (0, 1, 2 and 3 g/kg into the basal diets) on growth performance, carcass characteristic and blood lipid profile in broiler chicks. Six hundred one day old Ross 308 broiler chicks were randomly assigned into 5 treatments. Each treatment consisted of 6 replicates and there were 20 chicks in each replicate. In this experiment, avilamicin antibiotic (10 mg/kg into the basal diet) was used as a positive control. The obtained in results starter period showed that, none of the growth performance parameters affected by adding prebiotic. Adding avilamicin also did not affect the parameters under study. By adding 2 and 3 g/kg prebiotic or avilamicin into basal diet weight gain improved as compared with control diet (P<0.05) and feed conversion ratio was significantly lower in diet supplemented by 3 g/kg prebiotic or avilamicin in comparison with control diet (P<0.05). In finisher period, supplementing 2 and 3 g/kg prebiotic or avilamicin to the diet at the final growth period improved feed conversion ratio and weight gain significantly (P<0.05) as compared with the control diet. Addition 2 and 3 g/kg prebiotic to the diet decreased abdominal fat pad (as a percentage of live weight) significantly as compared with control diet, but its difference with diet supplemented by avilamicin was not significant. Only, in diet supplemented by 3 g/kg prebiotic the level of serum cholesterol was lower as compared with control diet (P<0.05). It seems that the best levels of mannanoligosaccharides were 2 and 3 g/kg of broiler diets. Manuscript profile