Effects of different levels of Glucan on growth performance, carcass composition and intestinal microbiota in Rutilus frisii kutum fry

The effects of adding a commercial dietary supplement (Hoplite) containing α and β glucan at 0, 0.5, 1 and 2% levels on the growth performance, body composition and intestinal microbiota of kutum roach, Rutilus frisii kutum, was investigated. The fingerlings (mean weight = 1 ± 0.15 g) were stocked in100 litre PVC tanks (25 individuals per tank) and fed experimental diets 3 times a day to apparent satiation for 60 days at constant water parameters. Biometry was performed every two weeks. At the end of the trial period, growth parameters, body composition and intestinal microbiota were studied. Fish fed 0.5 and 1% Hoplite exhibited highest weight gain, specific growth rate and final body weight, which were significantly different (P