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International Journal of Fisheries and Aquatic Studies
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(ICV-Poland) Impact Value: 76.37, Impact Factor: RJIF 5.69
E-ISSN: 2347-5129, P-ISSN: 2394-0506

International Journal of Fisheries and Aquatic Studies

2016, Vol. 4, Issue 4, Part B

Effects of dietary methionine levels and sources on performance, blood lipid profile and histopathology in Nile tilapia (Oreochromis niloticus)


Author(s): Amr Abd El-Wahab, Abeer Aziza, Hebatallah Mahgoub and Marwa Ahmed

Abstract: The present study was aimed to evaluate the effects of feeding different levels and sources of methionine (DL-Methionine and methionine hydroxy analogue, MHA) on growth performance and histopathological changes in Nile tilapia. The experiment was carried out over 60 days divided into 7 groups as follow: One group was fed a basic level of Met in the diet (5 g/kg diet) without any supplementation. The other groups were fed with different Met levels (+1/ +2/ +3 g/kg diet) as DL-Met or as MHA. Transmission electron microscopy and immunological index were also performed. Fish fed +1 g Met/kg as DL-Met had significantly higher body weight (58.1 g ± 3.85) than those fed +2 or +3 g Met/kg as DL-Met. No significant effects were found in body weight for fish fed +1 or +2 g Met/kg as MHA. All treatments induced significant reduction in the muscle thickness of the anterior segment of the intestine.

Pages: 89-98  |  798 Views  39 Downloads

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How to cite this article:
Amr Abd El-Wahab, Abeer Aziza, Hebatallah Mahgoub, Marwa Ahmed. Effects of dietary methionine levels and sources on performance, blood lipid profile and histopathology in Nile tilapia (Oreochromis niloticus). Int J Fish Aquat Stud 2016;4(4):89-98.
International Journal of Fisheries and Aquatic Studies