Effects of Dietary Protein Level on Growth and Body Composition of Channel Catfish Reared in Cage
- 1 October 1994
- journal article
- Published by Taylor & Francis in Journal of Applied Aquaculture
- Vol. 4 (2) , 73-86
- https://doi.org/10.1300/j028v04n02_06
Abstract
Channel catfish fingerlings (84 g) were stocked in 1.25-m3 cages at a rate of 250 fish/cage and fed to satiety once daily with diets containing 27, 32, 37, or 42% protein for 12 weeks. The diets were similar to commercial formulations, composed of soybean meal, corn, fish meal, and vitamin and mineral supplements. The protein to energy ration (P/E) was increased by substituting soybean meal and fish meal (5:1) for corn. Fish meal constituted a fixed percentage (15%) of the total protein of the diets. Growth of channel catfish fed diets with increasing dietary protein levels was not significantly different (P > 0.05) among treatments. Average final weight, total length, survival, food conversion ratio (FCR), and specific growth rate (SGR were 312 g, 31.3 cm, 84.8%, 1.47 and 1.47%/day, respectively. Protein efficiency ratio (PER) as significantly higher (P < 0.05) for fish fed a diet containing 27% protein compared to fish fed the other three diets. Dressing percentage was not significantly different (P < 0...Keywords
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