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The composition and oxidative stability of lipids in longissimus muscle from grazing cattle supplemented with sunflower oil alone or with fishoil

Published online by Cambridge University Press:  23 November 2017

A.P. Moloney ,
C.M. Daly ,
E. Ermias ,
K.J. Shingfield  and
F.J. Monahan
A.P. Moloney*
Affiliation:
Teagasc, County Meath, Ireland
C.M. Daly
Affiliation:
Teagasc, County Meath, Ireland
E. Ermias
Affiliation:
Teagasc, County Meath, Ireland
K.J. Shingfield
Affiliation:
MTT Agrifood Research, Jokioinan, Finland
F.J. Monahan
Affiliation:
University College Dublin, Dublin, Ireland
*
Email:[email protected]
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Extract

Compared with conventional indoor rations, consumption of grazed grass by cattle improved the fatty acid profile of beef, by increasing the polyunsaturated fatty acid (PUFA) and conjugated linoleic acid (CLA) concentrations and decreasing the n-6:n-3 PUFA ratio (French et al., 2000). Supplementation of grazing cattle with sunflower oil (S), increased the concentration of CLA in muscle but also increased the n-6: n-3 PUFA ratio (Noci et al., 2006). Supplementation with fishoil (F), a source of long-chain n-3 PUFA might decrease this ratio while enhancing CLA synthesis. However, increasing the concentration of PUFA, particularly the long-chain PUFA, may predispose muscle lipids and pigments to oxidation, with consequent impairment of lipid and colour stability. The objectives were to determine the effect of supplementation of grazing cattle with S and F on (i) tissue n-3 PUFA and CLA concentrations and (ii) the colour and lipid stability of beef.

Type
Theatre Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2007 , April 2007 , pp. 13
Copyright
Copyright © The British Society of Animal Science 2007

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References

French, P. Stanton, C., Lawless, F., O’Riordan, E.G., Monahan, F.J., Caffrey, P.J. and Moloney, A.P. 2000. Fatty acid composition, including conjugated linoleic acid, of intramuscular fat from steers offered grazed grass, grass silage, or concentrate based diets. Journal of Animal Science 78: 2849–2855.Google Scholar
Noci, F., French, P., Monahan, F.J. and Moloney, A.P. 2006. The fatty acid composition of muscle fat and subcutaneous adipose tissue of grazing heifers supplemented with plant oil-enriched concentrates. Journal of Animal Science (in press).Google Scholar