Effect of dietary vegetable lipid sources on the growth performance and whole-body fatty acid profile of giant trahira, Hoplias lacerdae

Aim of study: To evaluate which vegetable lipid source promotes better growth performance, whole-body composition and fatty acid profile for juvenile giant trahira (Hoplias lacerdae).
 Area Fish Nutrition Laboratory the University Viçosa (UFV), MG, Brazil.
 Material methods: A 50-day feed trial with four treatments, consisting diets containing different sources (canola, linseed, soybean or olive oil), was conducted juveniles 4.76 ± 0.50 cm 1.97 0.20 g.
 Main results: There were no effects on performance. fed canola oil had higher body deposition fish linseed lower content (up to -19.29%) than from other treatments. showed proportions saturated acids -11.27%) in body. highest percentages linoleic α-linolenic acids, respectively. oils also total polyunsaturated +81.14%). monounsaturated -58.59%) docosahexaenoic +175%) eicosapentaenoic (not detectable detectable) acids.
 Research highlights: Juveniles thraira can alter due their ability desaturate elongate n3 n6 series acids. Linseed identified as this species.