Influência das dietas contendo diferentes óleos vegetais na performance e perfil em ácidos graxos de alevinos de tilápia do Nilo (&lt;em&gt;Oreochromis niloticus&lt;/em&gt;)

Makoto Matsushita,Sandra Terezinha Marques Gomes,Jesuí Vergílio Visentainer,Carmino Hayashi,Karin Cristiane Justi,Roseli Das Graças Padre,Maria Cristina Milinsk,Nilson Evelázio De Souza

doi:10.4025/actascitechnol.v28i2.1169

Abstract

The fatty acid profile of the carcass of Nile tilapia ( Oreochromis niloticus ) fingerlings fed diets enriched with different soybean, canola, sunflower, flaxseed, rice, and corn oils was examined. The results showed that palmitic (16:0), stearic (18:0), oleic (18:1 n 9), linoleic (18:2 n 6), and linolenic (18:3 n 3) acids were the predominant fatty acids in all vegetable oil, diet, and fish carcass samples analyzed. Flaxseed oil presented the highest amount of linolenic acid (45.63%), while the other vegetable oils had percentages lower than 5.0%. Neither of the vegetable oils used affected the performance of tilapia fingerlings and they can be utilized in Nile tilapia fingerling diets. However, in relation to the carcass fatty acid profile, the use of flaxseed oil in Nile tilapia fingerling diet is recommended

Highlights

Tilapia is widely cultured in tropical and subtropical regions of the world and it constitutes the third most farmed finfish, after only carps and salmonids, respectively (El-Sayed, 1999).All animal species require nutrients and energy for their support, growth, and reproduction
The moisture values were higher than those found for tilapia (Oreochromis sp.) by Izquierdo et al (2000), 72.36%, and similar to those observed by Puwastien et al (1999), 78.1%, Justi et al (2003), 78.75%, and Visentainer et al (2005), 77.4%, for Nile tilapia (Oreochromis niloticus)
Fish treated with flaxseed oil-enriched feed presented the highest values of docosahexaenoic acid (DHA) and total n-3 polyunsaturated fatty acid (PUFA), being these values higher than those reported by Andrade et al (1995) for tilapia (Oreochromis niloticus), 0.94% for DHA and 4.81% for n-3 PUFA, and lower than those found by Izquierdo et al (2000), 5.0% for DHA in tilapia (Oreochromis sp.)

Summary

Introduction

Tilapia is widely cultured in tropical and subtropical regions of the world and it constitutes the third most farmed finfish, after only carps and salmonids, respectively (El-Sayed, 1999).All animal species require nutrients and energy for their support, growth, and reproduction. The performance of Nile tilapia (Oreochromis niloticus) fingerlings fed diets enriched with different vegetable oils and the fatty acid profile of the carcass was examined.

Results

Conclusion