1 NOVEMBER 1998
ONTOGENIC DEVELOPMENT OF AMYLASE ACTIVITY IN THREE SPECIES OF INDIAN MAJOR CARPS, CATLA CATLA, LABEO ROHITA AND CIRRHINUS MRIGALA, IN RELATION TO NATURAL DIET
S. Kumar, R. Chakrabarti-1998 Asian Fisheries Science 10(1998): 259-263 Abstract
Three species of Indian major carps, catla, rohu and mrigal, were reared from 4th day after hatching to 32 days in a recirculating system. Final average weight was 27.80 +/- 2 mg and 31.53 +/- 1.24 mg for catla and rohu, respectively, in the first experiment. In a second trial, the final weights for rohu and mrigal were 35.90 +/- 3.44 mg and 23.39 +/- 1.27, respectively. Amylase activity was very low during transition period from endogenous to exogenous feeding. Enzyme activity increased with age in all three species. It can be concluded that these three species of cyprinid larvae can easily hydrolize starch and digest glycogen present in animal tissues a few days after the initial feeding.
(Department of Zoology, University of Delhi, Delhi 110 007, India)