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Degummed crude canola oil supplementation affects fat depot melting points in purebred and first-cross Merino sheep

Citation

Flakemore, AR and McEvoy, PD and Balogun, RO and Malau-Aduli, BS and Nichols, P and Malau-Aduli, AEO, Degummed crude canola oil supplementation affects fat depot melting points in purebred and first-cross Merino sheep, Animal and Veterinary Sciences, 2, (3) pp. 75-80. ISSN 2328-5842 (2014) [Refereed Article]


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Copyright 2014 The Author (Attribution-Non Commercial-No Derivatives Licence CC BY-NC-ND)

DOI: doi:10.11648/j.avs.20140203.14

Abstract

The objective of this study was to test the hypothesis that degummed crude canola oil (DCCO) will lower fat melting points (FMP) of both visceral and subcutaneous fats in lambs. Twenty-four lambs comprising purebred and first-cross Merino progeny from Dorset, White Suffolk and Merino sires mates to purebred Merino ewes were supplemented with varying levels of DCCO over a nine week period. The experimental treatment groups were: Control (1kg plain wheat-based pellets only), Medium (500g plain wheat-based pellets + 500g wheat-based pellets containing DCCO), and High (1kg wheat-based pellets containing DCCO at a concentration of 50ml/kg) supplementation levels. The flock comprised eight wether and ewe lambs per treatment. However, at the end of the trial, four Merino ewes were retained in the flock for breeding purposes, while the remaining twenty lambs were slaughtered in a commercial abattoir. Visceral fat samples were taken from the kidney region and subcutaneous fat samples from the Longissimus dorsi muscle. FMP was determined using temperature slip point methodology in the laboratory. DCCO had significant effects on the FMP of both subcutaneous (P 0.0002) and visceral (p<0.0001) fats, with the lowest FMP achieved at high levels of supplementation in both fat depots. Significant sire breed differences (p<0.0001) were also detected in which Dorset-sired progeny had the highest melting points in both fat depots. The results of this study indicate that within fat depots, DCCO supplementation produced softer fats with lower melting points, suggesting potentially healthier fats containing higher levels of unsaturated fatty acids.

Item Details

Item Type:Refereed Article
Keywords:degummed crude canola oil, fat melting point, subcutaneous fat, visceral fat, sire breed
Research Division:Agricultural and Veterinary Sciences
Research Group:Animal Production
Research Field:Animal Nutrition
Objective Division:Animal Production and Animal Primary Products
Objective Group:Livestock Raising
Objective Field:Sheep - Meat
Author:Flakemore, AR (Mr Aaron Flakemore)
Author:McEvoy, PD (Mr Peter McEvoy)
Author:Malau-Aduli, BS (Dr Bunmi Malau-Aduli)
Author:Malau-Aduli, AEO (Associate Professor Aduli Malau-Aduli)
ID Code:90786
Year Published:2014
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2014-04-23
Last Modified:2015-03-27
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