The Effect of Celmanax Prebiotic on Growth, Hematological and Biochemical Parameters of Juvenile Oncorhynchus mykiss

Increasing population and food provision is one of the most important problems in the world, thus aquaculture plays an important role in the production of food and human needs. This study was to investigate the effect of Celmanax prebiotic on growth performance, hematological and biochemical factors of juvenile Oncorhynchus mykiss. For this study, 780 juvenile rainbow trout with an average weight of 18 ± 2 g were randomly divided into four groups with three replications. 0, 2, 4 and 6 percent of Celmanax were added into diets and the fishes were fed with 5% of body weight for 8 weeks 3 times. At the end of experiment, investigation of the growth indices, blood sampling and serum preparation for hematological and biochemical tests were performed. The results showed that fishes fed with diets containing 4% Celmanax prebiotic had better growth indices (final length, final weight, weight gain, percentage of weight gain and specific growth rate) compared to control (P≤0.05). Comparison between experimental treatments demonstrated that immune indices significantly increased with increase of prebiotic levels in the diet (P≤0.05). So that, the highest level of hemoglobin, red blood cell, white blood cell and neutrophil were related to fishes fed with 6% of Celmanax prebiotic diet. Also, the highest levels of immunoglobulin, albumin, glucose and lsozyme and the lowest levels of cholesterol and triglyceride and cholesterol were observed in fishes fed with 6% of Celmanax prebiotic diet, which showed a significant difference with control (P≤0.05). Increasing levels of Celmanax prebiotic in the diet caused an improvement in the growth and immunity system of rainbow trout.