Effect of dietary betaine on growth performance and nutrient utilization in deccan mahseer tor khudree (Sykes).
2011
Basade, Yasmeen | Kohli, M.P.S.
Effect of dietary betaine levels on growth performance and nutrient utilization in deccan mahseer juveniles was evaluated. Four isonitrogenous and isocaloric diets were formulated by supplementing the basal diet (37; crude protein) with graded levels of betaine (0, 5, 10 and 15 g kg−1 diet) and each of the diets were fed to five replicate groups of fish for 180 days. Betaine incorporated diets demonstrated significantly better growth performance and nutrient utilization than the control diet. The feed conversion efficiency (FCE), protein efficiency ratio (PER) and the crude protein (CPE), crude fat (CFE) and gross energy (GEE) efficiencies were significantly (P0.05) higher in betaine fed group as compared to control. Among all the inclusion levels tested, fish fed with diet containing lower dose of betaine (5g kg−1 of diet) showed significantly (P0.05) higher growth (in terms of weight gain and specific growth rate); high whole body protein, lipid and gross energy contents; high muscle RNA content and RNA/DNA ratio; high apparent dry matter, protein and lipid digestibility; and high activities protease and amylase in intestine and liver. Viscero-somatic index (VSI), hepato-somatic index (HSI), reno-somatic index (RSI) values were also high and cranio-somatic index (CSI) value was less in fish fed with low dietary betaine level. It can be concluded that supplementation of betaine up to the level of 5g kg−1 diet enhanced growth performance of deccan mahseer juveniles.
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