Apparent availability's of amino acids and mineral from several protein sources for fingering rainbow trout.

Apparent digestibilities of amino acids and minerals from white fishmeal, defatted soybean meal, malt protein flour and corn gluten meal were determined for fingerling rainbow trout. The test diet contained approximately 35% crude protein. The apparent protein digestibility of corn gluten meal was 96%, soybean meal and fishmeal were 94% and the lowest was malt protein flour at 86%. The apparent availabilities of individual amino acids within each protein source were similar and approximated the protein digestibility values. The apparent digestibilities of phosphorus from fishmeal and malt protein flour were greater than those of soybean meal and corn gluten meal. These results suggest that apparent protein digestibility's is indicative of the amino acid availability from a protein source with high protein digestibility such as fishmeal, soybean meal or corn gluten meal in fingerling rainbow trout.

Yamamoto, T. and coworkers. 1997. Apparent availability's of amino acids and mineral from several protein sources for fingering rainbow trout. Fisheries Sci. 63(6):995-1001.