Modulatory Potential of Selenium Supplementations on the Growth, Nutrients Profile and Regulation of Antioxidant Status of Striped Catfish (Pangasius Hypophthalmus)

Abstract

This study is designed to evaluate the impact of varying selenium levels on growth potential, nutrient profile and antioxidant enzymes activity in striped catfish. Fish were randomly allocated into 15 circular indoor tanks, each with a capacity of 2000 L, (100 (H) x 200 cm (D)) dimension, and were raised for 12 weeks. Fifteen fish were allocated to each tank across four separate treatment groups, each replicated three times, following an entirely randomized design. Five iso-nitrogenous diets (30% CP) were prepared from basal diet in which one was control and other four were supplemented selenomethionine (Se-met) with levels of 0, 0.5, 1.0, 1.5 and 2.0 mg/kg. Upon completion of the feeding trial, a diet containing Se at 1.5 mg/kg resulted in a significant increase (P<0.05) in weight gain (229.60±3.00) and SGR (0.92±0.23), along with a lower FCR (2.18±0.32). While, proximate composition remains non-significant (P > 0.05) against dietary Se feed.  Antioxidant enzymes activity in liver and muscle found higher in Se1.5 diet and Se2.0 mg/kg diet in comparison to lower dietary Se treatments. Moreover, dietary Se1.5 and Se2.0 treatments values remained non-significant. Overall, the results indicated that the incorporation of Se-met at 1.5 mg/kg in the diet can improve growth performance and antioxidant status in P. hypophthalmus.