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Toxins 2015, 7(6), 1929-1944; doi:10.3390/toxins7061929

Effects of Wheat Naturally Contaminated with Fusarium Mycotoxins on Growth Performance and Selected Health Indices of Red Tilapia (Oreochromis niloticus × O. mossambicus)

1
Department of Fisheries, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand
2
UG/OMNR Fish Nutrition Research Laboratory, Department of Animal and Poultry Science, University of Guelph, Guelph, ON N1G 2W1, Canada
3
Environmental Science, Faculty of Science, Burapha University, Bangsaen, Chonburi 20131, Thailand
4
Department IFA-Tulln, University of Natural Resources and Life Sciences, Vienna (BOKU), Konrad-Lorenz-Str. 20, Tulln 3430, Austria
5
Biomin Singapore Pte. Ltd., 3791 Jalan Bukit Merah, #08-08, E-Centre@Redhill, Singapore 159471, Singapore
*
Author to whom correspondence should be addressed.
Academic Editor: Sven Dänicke
Received: 22 December 2014 / Revised: 16 May 2015 / Accepted: 20 May 2015 / Published: 29 May 2015
(This article belongs to the Collection Fusarium Toxins – Relevance for Human and Animal Health)
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Abstract

An 8-week feeding trial was conducted to examine effects of wheat naturally contaminated with Fusarium mycotoxins (deoxynivalenol, DON 41 mg·kg1) on growth performance and selected health indices of red tilapia (Oreochromis niloticus × O. mossambicus; initial weight = 4.3 g/fish). Five experimental diets were formulated by replacement of clean wheat with naturally contaminated wheat resulting in graded levels of DON and zearalenone (ZEN) (Diet 1 0.07/0.01, Diet 2 0.31/0.09, Diet 3 0.50/0.21, Diet 4 0.92/0.37 and Diet 5 1.15/0.98 mg·kg1). Groups of 50 fish were randomly allocated into each of 20 aquaria and fed to near-satiety for eight weeks. Growth rate, feed intake and feed efficiency of fish fed the experimental diets decreased linearly with increasing levels of Fusarium mycotoxins (p < 0.05). Although growth depression was associated with feeding diets naturally contaminated with Fusarium mycotoxins, especially DON, no biochemical and histopathological parameters measured in blood and liver appeared affected by Fusarium mycotoxin concentrations of diets (p > 0.05). Though there was no clear evidence of overt DON toxicity to red tilapia, it is recommended that feed ingredients should be screened for Fusarium mycotoxin contamination to ensure optimal growth performance. View Full-Text
Keywords: mycotoxins; deoxynivalenol; Fusarium mycotoxins; red tilapia; growth performance mycotoxins; deoxynivalenol; Fusarium mycotoxins; red tilapia; growth performance
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Tola, S.; Bureau, D.P.; Hooft, J.M.; Beamish, F.W.H.; Sulyok, M.; Krska, R.; Encarnação, P.; Petkam, R. Effects of Wheat Naturally Contaminated with Fusarium Mycotoxins on Growth Performance and Selected Health Indices of Red Tilapia (Oreochromis niloticus × O. mossambicus). Toxins 2015, 7, 1929-1944.

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