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Histomorphology and histochemistry of the digestive tract in meagre (Argyrosomus regius)

M.Oliva, M.C.Rendon, M.L.Gonzalez de Canales

This work presents a histomorphological and histochemical study of the digestive tract of meagre, Argyrosomus regius, a commercially-important species of Spanish indigenous fish with a great future in aquaculture. The interest ofmeagre culture in several countries due to the necessity of increase the diversification of fish species in aquaculture does very important to know the physiology of A. regius for improving culture aspects such us the feeding and the reproduction. The carbohydrates, proteins and phosphatase enzymatic activities distribution in the digestive tract of A. regius were studied in oesophagus, stomach, intestine and pyloric caeca samples providing useful information in the study of the digestive processes. Due to the histological and histochemical characteristics described in thiswork, we could suggest one secretor function for stomach and secretor-absorptive for the intestine and pyloric caeca.