Abro, Rani
- Department of Applied Animal Science and Welfare, Swedish University of Agricultural Sciences
Abstract
Chitinolytic activity, nutrient uptake and intestinal barrier functions were investigated in gut tissues of Arctic charr (Salvelinus alpinus) fed iso-nitrogenous diets based on fish meal, with or without inclusion of zygomycetes (Rhizopus oryzae). We found that gut tissue of Arctic charr had significant chitinase activity, of both endo- and exo-chitinase iso-forms. Moreover, the distribution pattern along the GI tract of Arctic charr differed between endo-chitinase and exo-chitinase. The endo-chitinase activity in stomach tissue and in the distal intestine was several hundred-fold higher than the exo-chitinase activity in stomach tissue. The greatest exo-chitinase activity was found in the distal intestine. The zygomycete-based diet resulted in higher chitinolytic activity in gut tissue compared to the fish meal-based diet. Disturbed intestinal integrity and increased uptake rate of the amino acid lysine were observed in the distal, but not proximal, intestine of fish fed the zygomycete-based feed. (C) 2014 Elsevier Inc All rights reserved.
Keywords
Chitin; Zygomycetes; Intestinal barrier functions; Amino acid absorption; Plasma cortisol
Published in
Comparative Biochemistry and Physiology - Part B: Biochemistry and Molecular Biology
2014, volume: 175, pages: 1-8
Publisher: ELSEVIER SCIENCE INC
SLU Authors
Brännäs, Eva
- Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences
- Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences
Kiessling, Anders
- Department of Applied Animal Science and Welfare, Swedish University of Agricultural Sciences
- Department of Applied Animal Science and Welfare, Swedish University of Agricultural Sciences
Lindberg, Jan Erik
- Department of Applied Animal Science and Welfare, Swedish University of Agricultural Sciences
- Department of Applied Animal Science and Welfare, Swedish University of Agricultural Sciences
Lundh, Torbjörn
- Department of Applied Animal Science and Welfare, Swedish University of Agricultural Sciences
- Department of Applied Animal Science and Welfare, Swedish University of Agricultural Sciences
UKÄ Subject classification
Fish and Aquacultural Science
Publication identifier
- DOI: https://doi.org/10.1016/j.cbpb.2014.06.003
Permanent link to this page (URI)
https://res.slu.se/id/publ/61019