Chitinase activity in the digestive tract of the cod, Gadus morhua (L.)
Article first published online: 24 JAN 2006
Journal of Fish Biology
Volume 24, Issue 2, pages 125–133, February 1984
How to Cite
Danulat, E. and Kausch, H. (1984), Chitinase activity in the digestive tract of the cod, Gadus morhua (L.). Journal of Fish Biology, 24: 125–133. doi: 10.1111/j.1095-8649.1984.tb04784.x
- Issue published online: 24 JAN 2006
- Article first published online: 24 JAN 2006
- (Received 11 January 1983, Accepted 7 March 1983)
The study was made to determine if enzymatic degradation of chitin occurs in the digestive tract of the cod, Gadus morhua. The method employed corresponds to the end product measurement of Jeuniaux (1966), using ‘native’ chitin as the substrate. The following results were obtained.
- 1Chitinolytic enzyme of high activity is present in enzyme solutions from the stomach contents, gastric mucosa and intestinal contents.
- 2Lower chitinase activities are found in samples of the intestinal mucosa and the pyloric caeca.
- 3The optimum pH ranges for the action of the enzymes in the stomach and the intestine differ: 4.5–5.1 and 5.1–6.5, respectively.
- 4The role of chitin-decomposing bacteria is discussed, based on bacterial numbers and pH conditions in the digestive tract. The existence of two different enzyme systems is indicated.