The development of the digestive system of larvae of Dicentrarahus labrax has been studied. The changes in activities of digestive enzymes from hatching to 30 days have been investigated. 8 activities have been recorded : esterases, a-glucosidase, trypsin, chymotrypsin, leucinaminopeptidase, alkalin and acid phosphatase, using polyacrylamid gel electrophoresis. All the activities are very weak at hatching j the activities of trypsin, a-glucosidase, alkalin phosphatase increase between 0 and 5 days, decrease slowly and are quite stable from 15 to 30 days. The other activities increase steadily from 0 to 20 days. Relationships between the developmental process of the digestive system and changes in activities are investigated. |