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Journal of Fisheries and Aquatic Science
Year: 2006  |  Volume: 1  |  Issue: 2  |  Page No.: 102 - 111

Non-gelatinized Corn Supplemented with Microbial α-amylase at Sub-optimal Protein in the Diet of Labeo rohita (Hamilton) Fingerlings Increases Cell Size of Muscle

S. Kumar, N.P. Sahu and A.K. Pal    

Abstract: A 60 days feeding trial was conducted to delineate the effect of both gelatinized (G) and non-gelatinized (NG) corn supplemented with exogenous microbial α-amylase (0, 50, 100 and 150 mg kg-1) at either sub-optimal (28%) or optimal (35%) crude protein (CP) level on muscle protein, muscle protein/DNA ratio and DNA/muscle mass (wet wt.) ratio of Labeo rohita fingerlings. Three hundred sixty fingerlings (av. wt. 10±0.15 g) were randomly distributed in 12 treatment groups with each of two replicates. The muscle protein and muscle protein/DNA ratio of NG corn fed groups was significantly higher (p<0.05) than the G corn fed groups, whereas reverse trend was found for DNA/muscle mass (wet wt.) ratio. There was no significant effect on muscle protein, muscle protein/DNA ratio and DNA/muscle mass (wet wt.) ratio at both 28% and 35% CP. Supplementation of α-amylase at 50 mg kg -1 increased the muscle protein and muscle protein/DNA ratio beyond which no significant changes were observed but DNA/muscle mass (wet wt.) ratio was significantly higher in non α-amylase supplemented group. Hence it concludes that NG corn with 50 mg α-amylase kg -1 at 28% CP is optimum in the diet of L. rohita fingerling to improve muscle protein, muscle protein/ DNA ratio and DNA/ muscle mass (wet weight) ratio.

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