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 Biochemjournal_title
Fish physiology and biochemistryauthors
Uscanga A,Moyano FJ,Alvarez CAdoi
10.1007/s10695-010-9385-8subject
Has Abstractpub_date
2010-12-01 00:00:00pages
1079-85issue
4eissn
0920-1742issn
1573-5168journal_volume
36pub_type
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