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Journal of Fisheries and Aquatic Science
Year: 2006  |  Volume: 1  |  Issue: 1  |  Page No.: 97 - 101

Growth Response, Survival, Feed Conversion and Protein Utilization in Fingerlings of Rohu, Labeo Rohita (Hamilton) to Diets of Different Protein Levels

P.K. Singh, S.R. Gaur and S.P. Tiwari    

Abstract: A growth experiment was conducted to determine the optimum protein level for fingerlings of Labeo rohita (initial average weight 1.82±0.02 g). Four practical diets were formulated contain four protein levels (25, 30, 35 and 40%). Each diet was randomly assigned to four replicate groups of 10 fish per aquarium (60 x 30 x 30 cm). Fish were fed twice daily (08.30-09.00 h and 16.00-16.30) to apparent satiation for 7 weeks. The results showed that the growth was significantly influenced by protein levels (p<0.01). Fish fed the diet with 30 % protein had the higher specific growth rate (2.48±0.01) and protein efficiency ratio (1.75±0.07) than those with 25, 35 and 40% protein. While survival rate is best with 30-35% protein level. Carcass composition also revealed higher accumulation of protein and lipid in fish fed on diet containing 30% protein. These findings suggest that about 30% protein in diet appears to be sufficient for obtaining optimum growth in Labeo rohita.

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