Abstract
After fresh denounced tunny entrails which were washed and saturated with acetone were crushed to gieces, they were dried at 60°C for one week and powdered. Using weaning rats, the nutritive value of protein of the tunny entrails powder and the growth of animals fed the entrails diets modifying total amino acid contents of them were compared with those of casein.
1) Both protein efficiency ratio and net protein ratio of the protein of tunny entrails were about 75% of those of casein.
2) Biological value of the protein was not so different from that of casein, but net protein utilization was approximately 90% of that of casein owing to its rather lower digestibility.
3) There was no difference in growth of the animals between the tunny entrails and casein diets which had the equal amounts of total amino acids.
4) The growth of rats was not affected by the addition of tunny entrails oil to a casein diet.
