Comparative study on amylase activity in three freshwater fish larvae during early development

摘要

An experiment was conducted to quantitatively compare amylase activity during post embryonic developmental period of three bundh-bred Indian major carps, Labeo rohita (Ham), Carla carla (Ham) and Cirrhinus mrigala (Ham). For this purpose, amylase activity in fed and starved fish larvae was measured. In all three species and in larvae starved for 24 h, amylase activity was depressed although significant changes in activity in starved and fed larvae were observed after day 17. The result showed a rhythmic pattern of amylase activity, during the study period (5-68 days) starting from low activity (5-26 days) accelerating to a peak (29-56 days) and very low activity thereafter. Changes of enzymatic patterns were found to be more prominent in L. rohita followed by C. catla and C. mrigala. The activity of this enzyme was found to be low in C. mrigala compared to L. rohita and C. catla. These changes may be related to different digestive systems and of carps' species specific food habits. The results are discussed in the text.