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Effects of organic plant oils and role of oxidation on nutrient utilization in juvenile rainbow trout (Oncorhynchus mykiss)

Lund, Ivar; Dalsgaard, Johanne; Hansen, Jonea Høeg; Jacobsen, Charlotte; Holm, Jørgen and Jokumsen, Alfred (2012) Effects of organic plant oils and role of oxidation on nutrient utilization in juvenile rainbow trout (Oncorhynchus mykiss). [Effekten af økologiske planteolier og betydningen af oxidation på næringstof udnyttelsen hos regnbueørred.] Animal: An International Journal of Animal Bioscience, 1, pp. 1-10. [In Press]

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Summary

The study compared the effect of four either fresh or force oxidized organic plant oils in diets for juvenile rainbow trout (Oncorhynchus mykiss) in which 47% of conventional LT fish meal protein was substituted by a mixture of 3 organic plant protein concentrates. Fish oil was completely substituted with either organic linseed oil; rape seed oil; sunflower oil or grape seed oil and evaluated based on feed intake, feed utilization, growth and digestibility. None of the plant oils affected feed intake and growth parameters. Organic plant oils had all a positive effect on lipid digestibility as compared with the fish oil based control diet, despite the very different FA profiles. The organic vegetable oils did not undergo autoxidation, as opposed to the fish oil control for which lipid digestibility was significantly negative influenced.

Summary translation

I dette studie sammenlignedes effekten af fire enten friske eller tvangs oxiderede økologiske planteolier i diæterne til regnbueørred (Oncorhynchus mykiss), hvor 47% af LT fiskemels proteinet var erstattet med en blanding af 3 økologiske planteprotein koncentrater. Fiskeolien var fuldstændig erstattet med enten økologisk hørfrøolie; - rapsolie; - solsikkeolie eller - vindruekerneolie. Diæterne blev bedømt ud fra foderindtag, foderudnyttelse, vækst og fordøjelighed. Ingen af planteolierne havde indflydelse på foderindtag og vækst. Alle økologiske planteolier had en positive effekt på lipid fordøjelighed sammenlignet med den fiskeoliebaserede kontroldiæt til trods for forskellene i fedtsyre profiler. De økologiske planteolier autooxiderede ikke, i modsætning til fiskeolie kontrollen, hvor lipid fordøjeligheden var significant negativt påvirket.

EPrint Type:Journal paper
Keywords:organic, rainbow trout, plant oils, oxidation, utilization
Subjects: Food systems > Food security, food quality and human health
Animal husbandry > Feeding and growth
Animal husbandry > Health and welfare
Knowledge management > Education, extension and communication
Research affiliation: Denmark > DARCOF III (2005-2010) > ORAQUA - Organic fish production
Denmark > DTU - Technical University of Denmark
Denmark > ICROFS - International Centre for Research in Organic Food Systems
Deposited By: Jokumsen, Senior Advisory Scientist Alfred
ID Code:21044
Deposited On:18 Jul 2012 06:00
Last Modified:18 Jul 2012 06:00
Document Language:English
Status:In Press
Refereed:Peer-reviewed and accepted

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