Protein requirements of tropical cichlid: a comparison of fixed-rate feeding and satiation feeding
2000
Martinez-Palacios, C.(CIAD-Mazatlan, Sabalo Cerritos s/n Estero del Yugo, Mazatlan, Sinaloa (Mexico)) | Harfus-Melendez, M.(CIAD-Mazatlan, Sabalo Cerritos s/n Estero del Yugo, Mazatlan, Sinaloa (Mexico)) | Chavez-Sanchez, C.(CIAD-Mazatlan, Sabalo Cerritos s/n Estero del Yugo, Mazatlan, Sinaloa (Mexico)) | Ross, L.G. (University of Stirling, Stirling Institute of Aquaculture (Scotland))
Protein requirements of young Mexican cichlid of 0.3 g mean weight were determined using two methods, a fixed feeding rate of 6% body weight per day and satiation feeding. In the fixed rate trials, nine isoenergetic diets were formulated with protein levels, ranging from 347 to 561 g kg-1 using brown fish meal as the only protein source. In the satiation feeding trials, ten diets were formulated based on brown fish meal, ranging from 0-450 g kg-1 protein. When fish were fed fixed rate diets of protein contents between 435 and 560 g kg-1, the broken-line analysis showed that, in terms of weight gain (%), the optimum protein level was about 453 g kg-1. When fish were fed to satiation, the best absolute growth was obtained with 383 g kg-1 protein, and broken line analysis suggested an optimum of about 325 g kg-1. The difference between the results of the two techniques, in quite distinct. The probable mechanism underlying data was discussed.
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