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Type: Artigo
Title: Manipulation of fatty acid composition of Nile tilapia (Oreochromis niloticus) fillets with flaxseed oil
Author: De Souza, N.E.
Matsushita, M.
De Oliveira, C.C.
Franco, M.R.B.
Visentainer, J.V.
Abstract: Nile tilapia (Oreochromis niloticus) is one of the most consumed species among freshwater fish reared in Brazil. However, studies show low levels of n-3 fatty acids in freshwater fish reared in captivity in comparison with those reared in their natural habitats. The Nile tilapia used in this study were raised in captivity for a period of 5 months and fed varying amounts (0, 1.25, 2.5, 3.75 and 5%) of flaxseed oil as a substitute for sunflower oil (control). No significant differences (P > 0.05) in total lipid (TL) content were found between fillets of tilapia fed the different diets. TL analysis of fatty acid methyl esters by capillary gas chromatography revealed a total of 50 components common to all treatments studied. The major fatty acids present were linoleic acid (18:2n-6), oleic acid (18:1n-9) and palmitic acid (16:0). All treatments led to significant % increases in α-linolenic acid (18:3n-3), eicosapentaenoic acid (20:5n-3) and docosahexaenoic acid (22:6n-3). Increases in both total n-3 fatty acids and total polyunsaturated fatty acids were observed concomitantly with decreases in total n-6 fatty acids, resulting in increases in n-3/n-6 ratio, with increasing level of flaxseed oil in the feed. Thus feed supplementation with flaxseed oil contributed greatly to raising the nutritional lipid value of Nile tilapia fillets.
Subject: Tilápia do Nilo
Ácidos graxos
Óleo de linhaça
Country: Reino Unido
Editor: John Wiley & Sons
Rights: Fechado
Identifier DOI: 10.1002/jsfa.2877
Date Issue: 2007
Appears in Collections:FEA - Artigos e Outros Documentos

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