On the activity of some intestinal enzymes in Cyprinus carpio, Aristichthys nobilis and Carassius auratus gibelio species

The present paper develops a comparative analysis on the activity of some enzymes (amylase, pepsin, trypsin) from the median part of the gastro-intestinal tractus, known as involved in the hydrolytic degradation of exogenous glucides and proteins, in three, two summer-old fish species, from a system of controlled growing. Both the amylase and the peptid-hydrolases under investigation evidenced a quite obvious enzymatic activity, variable from one species to another, the maximum values being attained, each time, in the case of Cyprinus carpio species.