1. Imbalanced lysine to arginine ratios reduced performance in juvenile cobia ( Rachycentron canadum) fed high plant protein diets.
- Author
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Nguyen, M., Rønnestad, I., Buttle, L., Lai, H., and Espe, M.
- Subjects
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COBIA , *PHYSIOLOGICAL effects of arginine , *HIGH-protein diet , *PLANT proteins as feed , *LYSINE , *BODY weight - Abstract
Cobia (8.4 ± 0.1 g body weight) were fed to satiation with three test diets of high plant protein-based ingredients and different lysine to arginine ratios, and one commercial diet (currently used for cobia rearing in Vietnam as a control for growth) for 6 weeks. The test diets contained 206 g marine ingredients kg−1, including fishmeal, krill meal and fish protein concentrate (in order of high to low inclusion), while the rest of the dietary protein was a blend of soya and pea protein concentrate, wheat protein and sunflower meal. Crystalline lysine and arginine were added in the test diets to produce either a balanced lysine to arginine ratio ( BL/ A; 1.1) and a high or low lysine to arginine ratio ( HL/ A; 1.8 and LL/ A; 0.8, respectively). There were no significant differences in final body weight, weight gain, feed conversion ratio or protein gain between cobia fed BL/ A- and commercial control diet ( CCT). Cobia fed BL/ A diet performed better than fish fed either HL/ A- or LL/ A diet. This was partly due to a higher feed intake and protein and lipid gain in cobia fed BL/ A diet as compared to HL/ A- and LL/ A diet. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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