Author(s): Md. Fahim Fayshal Bappi, Mst. Nahid Akter and Imran Parvez

Abstract: This study was conducted to evaluate the effect of mannan oligosaccharide (MOS) supplementation on the growth performance, survival and proximate composition of reba carp, Cirrhinus reba fry. Triplicate groups of reba fry (0.25±0.002 g) were fed twice per day at 10% of body weight for 12 weeks with 0 (control), 0.2 and 0.4% MOS diets. Significantly highest (P<0.05) weight gain and specific growth rate were observed in fish fed with 0.2% MOS diet. Higher survival rate (100%) where observed in fish feed with 0.2% MOS diet compared to two other feeding trails. Significantly highest hepatosomatic and viscerosomatic index and lowest intraperitoneal fat were noted when the fish fed with 0.2% MOS diet compared to those fish fed with 0.4% MOS diet. Significantly highest and lowest protein content were observed in fish fed with 0.2% MOS supplemented diet and control diet respectively, whereas the lipid and ash content was significantly highest at 0.4% MOS diet. Thus, the results of this study indicated that dietary administration of MOS at 0.2% may influence the growth performance and body composition of reba fry.

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