The effect of production system and management practices on the quality of meat products from ruminant livestock

dc.contributor.authorWebb, E.C. (Edward Cottington)
dc.contributor.authorErasmus, Lourens Jacobus
dc.contributor.emailedward.webb@up.ac.zaen_US
dc.date.accessioned2014-05-05T12:11:29Z
dc.date.available2014-05-05T12:11:29Z
dc.date.issued2013
dc.description.abstractDemands for products of animal origin are increasing worldwide owing to the significant growth in the human population and changes in the health, wealth and life expectancy of people. The agricultural sector has the scientific knowledge, expertise and technology to respond to these challenges, but consumers are concerned about the methods used to meet these new challenges. They are also concerned about the environmental impact of modern technologies and intensification of production systems. Various combinations of pasture-based and intensive systems are employed to raise ruminant livestock, depending on resources and climate. The quality of animal products from production systems differs, but there are advantages and disadvantages for each. In South Africa, cattle and sheep are generally fattened for short periods to ensure efficient production and to meet market requirements. This is more easily achieved by feeding different proportions of concentrate diets, with or without feed additives and growth promotants that are approved for use in food-producing animals. Hormonal growth implants are strictly regulated for use in animal production systems. Production systems affect both the extrinsic and intrinsic aspects of carcass and meat quality of livestock. Extrinsic aspects that are affected include weight gain, age at slaughter and carcass weight. Concentrate feeding generally yields a more consistent carcass composition than pasture-fed animals, which addresses the necessity for more consistent meat quality. Intrinsic aspects of animal products that are affected include carcass composition and conformation, carcass fat content and colour, meat composition, colour, tenderness and flavour. Beef and lamb from pastures are darker, and carcass fat contains more yellow pigments, which may affect a consumer’s choice to purchase. The typical pasture flavour in meat is because of the presence of branched-chain fatty acids, 3-methylindole and other oxidation products, and off-flavours are often detected. In many countries, the meat flavour of intensively fed livestock is preferred to pasture-fed animals, but certain consumers prefer the more intense pasture flavour. Pasture feeding has beneficial effects on n-3 fatty acids, notably eicosapentaenoic acid (EPA, C20:5n-3) and docasahexaenoic acid (DHA, C22:6n-3). Beef and lamb from pasture-fed animals are generally less tender, but shelf life is better, owing to the presence of antioxidants such as vitamin E.en_US
dc.description.librarianam2014en_US
dc.description.urihttp://www.sasas.co.zaen_US
dc.identifier.citationWebb, EC & Erasmus, LJ 2013, 'The effect of production system and management practices on the quality of meat products from ruminant livestock', South African Journal of Animal Science, vol. 43, no. 3, pp. 414-423en_US
dc.identifier.issn0375-1589 (print)
dc.identifier.issn222-4062 (online)
dc.identifier.other10.4314/sajas.v43i3.11
dc.identifier.urihttp://hdl.handle.net/2263/39686
dc.language.isoenen_US
dc.publisherSouth African Society for Animal Scienceen_US
dc.rightsCopyright resides with the authors in terms of the Creative Commons Attribution 2.5 South African Licence.en_US
dc.subjectHormonal growth implantsen_US
dc.subjectFeed additivesen_US
dc.subjectAntimicrobial implantsen_US
dc.subjectCarcass qualityen_US
dc.subjectMeat qualityen_US
dc.titleThe effect of production system and management practices on the quality of meat products from ruminant livestocken_US
dc.typeArticleen_US

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