PERKEMBANGAN ORGAN PENCERNAAN DAN AKTIVITAS ENZIM PROTEASE LARVA IKAN BAWAL AIR TAWAR Collosoma macropoma

The ???tambaqui??? Collosoma macropoma is one of the commercially important fishes. Succed of such fish culture is highly depending on larvae number and quality. Subsequently, the good quality of larva is depending on their appropriate feed. The Syudy was aimed to examine the development of digestive organ and protease enzyme activity of tambaqui larvae. Tambaqui larvae. Tambaqui larvae of 5, 10,15, 20,25, 35 and 35 days old after hatching were examined. Whole bodies of larvae were used to determine the activities of enzyme. The study showed that digestive organ being differentiated on the 10 days after hatching, liver and pancreas coulb be detected, the villis were present in the intestine and getting higher as the larvae getting older. The protease enzyme activity increased as tge age of larvae increased. The highest relative increase of protease enzyme (91,60%) occurred when the larvae at 30 days old (20.02 ??? 21.03 mm in body length). It was suggested that the use of artificial diets coub begin on this size