Phosphorous digestibility and activity of intestinal phytase in hybrid tilapia, Oreochromis niloticus X O. aureus
Journal of Applied Aquaculture
By: M.W. La Vorgna, Y. Hafez, S. G. Hughes, and T. Handwerker
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Abstract
Experiments were conducted to determine the degree to which phytate-bound phosphorus from plant protein sources could be used by hybrid tilapia (Oreochromis niloticus X O. aureus). Utilizing an inert marker technique with chromic oxide, hybrid tilapia in our study were effective at utilizing both inorganic and phytate phosphorus as evidenced by average apparent digestibility values of 93.2% and 90.0% for total and phytate phosphorus, respectively. Analysis of the intestinal brush border membrane of the tilapia revealed enzyme activity that was capable of hydrolyzing phytic acid. The presence of phytic acid hydrolyzing enzyme activity in the intestinal brush border provides a probable mechanism by which these hybrid tilapia are able to utilize phytate phosphorus effectively. ?? 2003 by The Haworth Press, Inc. All rights reserved.
Suggested Citation
La Vorgna, M., Hafez, Y., Hughes, S.G., and Handwerker, T., 2003, Phosphorous digestibility and activity of intestinal phytase in hybrid tilapia, Oreochromis niloticus X O. aureus: Journal of Applied Aquaculture, v. 14, no. 1-2, p. 89-100, https://doi.org/10.1300/J028v14n01_06.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Phosphorous digestibility and activity of intestinal phytase in hybrid tilapia, Oreochromis niloticus X O. aureus |
| Series title | Journal of Applied Aquaculture |
| DOI | 10.1300/J028v14n01_06 |
| Volume | 14 |
| Issue | 1-2 |
| Year Published | 2003 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Journal of Applied Aquaculture |
| First page | 89 |
| Last page | 100 |