Assessment of enzymatic efficiency on protein digestion in the tilapia Oreochromis niloticus.

Abstract:

:The present study develops an experimental procedure aimed to estimate the efficiency of protein digestion in fish by measuring both gut transit rate and total amount of the main intestinal proteases (trypsin and chymotrypsin). The selected species was the Nile tilapia (Oreochromis niloticus). Total time for digestion, calculated through the estimation of gut transit rate using differently colored feeds, was 7.15 h. Mean production of trypsin and chymotrypsin was 15.94 and 24.11 mU in the proximal intestine and much lower (2,39, 4.90 mU) in the distal intestine. The enzyme efficiency, calculated from the average enzyme activity and time of residence of the digesta in each intestinal section, points to the major role of proximal intestine in protein digestion for this species. Results are discussed in relation to the main features characterizing digestion in stomachless fish.

journal_name

Fish Physiol Biochem

authors

Uscanga A,Moyano FJ,Alvarez CA

doi

10.1007/s10695-010-9385-8

subject

Has Abstract

pub_date

2010-12-01 00:00:00

pages

1079-85

issue

4

eissn

0920-1742

issn

1573-5168

journal_volume

36

pub_type

杂志文章