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Open AccessArticle

Enhanced Omega-3 Polyunsaturated Fatty Acid Contents in Muscle and Edible Organs of Australian Prime Lambs Grazing Lucerne and Cocksfoot Pastures

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Animal Genetics and Nutrition, Veterinary Sciences Discipline, College of Public Health, Medical and Veterinary Sciences, Division of Tropical Health and Medicine, James Cook University, Townsville, QLD 4811, Australia
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National Institute of Animal Science, Thuy Phuong, Bac Tu Liem, Hanoi 129909, Vietnam
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College of Economics and Techniques, Thai Nguyen University, Thai Nguyen 252166, Vietnam
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Asia Pacific Nutrigenomics and Nutrigenetics Organisation (APNNO), CSIRO Food & Nutrition, Adelaide, SA 5000, Australia
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College of Medicine and Dentistry, Division of Tropical Health and Medicine, James Cook University, Townsville, QLD 4811, Australia
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CSIRO Oceans & Atmosphere, PO Box 1538, Hobart, TAS 7001, Australia
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Nutrition Society of Australia (NSA), Level 3, 33-35 Atchison Street, St Leonards, NSW 2065, Australia
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Australasian Section, American Oil Chemists Society (AAOCS), 2710 S. Boulder, Urbana, IL 61802-6996, USA
*
Author to whom correspondence should be addressed.
Nutrients 2018, 10(12), 1985; https://doi.org/10.3390/nu10121985
Received: 3 November 2018 / Revised: 27 November 2018 / Accepted: 13 December 2018 / Published: 15 December 2018
(This article belongs to the Special Issue Effects of Omega-3 Polyunsaturated Fatty Acids and Human Health)
The enhancement of health-beneficial omega-3 long–chain (≥C20) polyunsaturated fatty acid (n-3 LC-PUFA) contents in the muscle, liver, heart, and kidney of Australian prime lambs through pasture grazing and supplementation with oil infused pellets was investigated. Forty-eight first-cross prime lambs were randomly assigned into a split-plot design with pasture type as the main plot effect and pellet supplementation as a sub-plot effect in a feeding trial that lasted for nine weeks. The n-3 LC-PUFA content in Longissimus dorsi muscle of all lambs was well above the 30 mg threshold for “omega-3 source” nutrition claim under the Australian Food Standards and Guidelines. Pasture type impacted the fatty acid contents in muscle, heart, and kidney of prime lambs. Lambs grazing cocksfoot grass only had high 18:3n-3 (ALA) and n-3 LC-PUFA contents (67.1 mg/100 g and 55.2 mg/100 g, respectively) in the Longissimus dorsi muscle, which was not significantly different (p > 0.8990) from the contents of lambs grazing only lucerne. Supplementation of pellets with or without oil infusion to grazing lambs generally decreased the ALA and n-3 LC-PUFA contents and increased the n-6/n-3 ratio in the Longissimus dorsi muscle. The fatty acid content in the internal organs of grazing lambs was also affected by pellet supplementation. The liver and kidney of grazing lambs were both “good sources” (60 mg/100 g) of omega-3. The cocksfoot grass showed considerable potential for producing healthy, premium quality meat with high contents of n-3 and n-3 LC-PUFA, which may consequently enhance the omega-3 intake of Australian lamb consumers. View Full-Text
Keywords: lamb; n-3 LC-PUFA; muscle; liver; heart; kidney; rice bran; canola; cocksfoot; lucerne lamb; n-3 LC-PUFA; muscle; liver; heart; kidney; rice bran; canola; cocksfoot; lucerne
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Le, H.V.; Nguyen, Q.V.; Nguyen, D.V.; Otto, J.R.; Malau-Aduli, B.S.; Nichols, P.D.; Malau-Aduli, A.E.O. Enhanced Omega-3 Polyunsaturated Fatty Acid Contents in Muscle and Edible Organs of Australian Prime Lambs Grazing Lucerne and Cocksfoot Pastures. Nutrients 2018, 10, 1985.

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