マダイChrysophrys majorの成長におよぼす植物性蛋白質の影響〔魚類の摂餌刺激物質の研究〕

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Effects of the level of plant protein on the growth and feed efficiency of red sea bream were studied for three kinds of diet containing various proteins. Fish meal, autolysed fish viscera, soy protein and corn gluten meal were used. The experimental periods were 200, 80, and47 days. The growth and feed efflciency of the fish were better when the content of corn glutten meal in the plant protein was higher than that of soy protein; the most effective mixing ratio of corn gluten meal to soy protein was about 3:2. The effective mixing ratio of autolysed tuna viscera of fish meal (animal proteins) to autolysed squid viscera was about 3:2. Low contents of crude fat in the diets (12-17%) had no effect on the growth and feed efficiency during the feeding experiments.