魚類の飼料組成と代謝変動-I : コイの代謝変動に及ぼす飼料組成の影響

概要

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Changes in serum glucose level, serum amylase and protease activities, and histochemical changes in hepatopancreas of carp, Cyprinus carpio, fed diets of different compositions were investigated. The results obtained were as follows. Serum glucose level depended on the carbohydrate content in diets, but no change was observed during the first 10 days. After 20 days of feeding the high carbohydrate diets, the carp exhibited a high level of serum glucose (> 150mg/dl). The dependence of serum amylase activity on carbohydrate was also evidenced by increased activity of this enzyme as the carbohydrate content in diets increased. Serum protease activity exhibited an opposite pattern, since the enzyme activity increased progressively with decreased protein in diets. In histochemical investigation of the hepatopancreas, atrophy and accumulation of neutral fat were recognized in the carp fed high protein diets. On the other hand, hypertrophy and disappearance of neutral fat were observed in the hepatopancreas of carp fed high carbohydrate diets. Even though carp are omnivora, the above results seem to suggest limited use of both dietary carbohydrate and dietary protein.
公益社団法人日本水産学会の論文