THE EXPERIMENTAL STUDIES ON ACTIVITIES OF DIGESTIVE ENZYME IN THE LARVAE PENAEUS CHINENSIS

Act ivit ies of several dig est ive enzymes f rom larval Penaeus chinese w ere analyzed w ith the enzyme analy tical method during its ontogenet ic development . The results show ed that there were 4 different pat terns in the act ivit ies of 5 digest ive enzymes from larval praw n. The act ivit ies of pepsin enzyme and t ry ptase increased along w ith the growth of larval praw n, w hile the act ivit ies of amylase decreased. T he activities of cellulase enzyme and lipase w ere fairly low . The act ivit ies of pepsin enzyme, t rytase and amylase changed obviously in feeding habit s transformat ion. T he act ivities of digest ive enzyme f rom larval praw n w ere af fected obviously by the different diets and ontogent ic development . T he authors suggested that the act ivit ies of dig est ive enzyme in the larval praw n w ere associated w ith its genet ic cont rol and liver different iat ion and adjust ing mechnism.