Abstract

Carbohydrates are cheap energy sources in animal nutrition. These stuffs are rich in anti-nutrient factors which affect the animal physiological performance. Some main compositions are called non-starch polysaccharides which mainly composed of arabinoxylans (that is, in wheat, triticale and rye) and beta glucanases (that is, in barley and oats). In this study, 90 fish in three treatments (30 fish treatment^-1) and in triplicate itself (each replicate contains 10 fish, 50 L glass aquarium^-1) fed by enzyme treated diets in 3 levels of 0% as control, 0.1% and 0.5% for 8 weeks. Enzyme supplementation at the level of 0.1% increased blood parameters such as blood sugar, cholesterol and triglyceride but decreased total protein and uric acid (P<0.05). In term of hematological parameters, best performance was evaluated for enzyme treatment at the level of 0.5%. All parameters such as white blood cells (R.B.Cs), red blood cells (R.B.Cs), hemoglobin and hematocrit in this level (0.5%) was higher than other treatments (P<0.05). The aim of this study was to evaluate the effects of purified b-glucanase on someblood parameters of common carp (Cyprinus carpio) fed on barley based diet. Authors suggest that beta-glucanase addition in aqua-feeds based on barley can be useful for fish health and may be as immunity stimulator.

Key words: Non-starch polysaccharides, glucose, cholesterol, triglycerides, hematocrit.