魚類の消化酵素に関する研究-I. : 数種の魚類の消化管におけるカルボヒドラーゼ活性

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The activities of various kinds of carbohydrases in the digestive organs of several fishes were determined with TAUBER-KLEINERs method modified by the authors. The results obtained were as follows. Adult carp showed marked maltase, amylase, and weak sucrase, lactase, melibiase, cellobiase and methyl-α-D-glucosidase activities in the intestine. The activities of maltase and amylase in adult carp intestine were highest in distal part while that of sucrase was highest in central part. The specific activities of maltase and amylase in young carp intestine were higher than those in adult carp. Young carp also showed the activities of weak trypsin-like enzyme and maltase in the pharynx, and fairly high activities of trypsin-like enzyme, mal-tase and amylase in the esophagus. Even carnivorous fish such as red sea bream and marine ayu showed considerable activities of maltase in their digestive tract.
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