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Meat quality of Boer goat kids and Mutton Merino lambs 1. Commercial yields and chemical composition

Published online by Cambridge University Press:  18 August 2016

R. Sheridan ,
L.C. Hoffman  and
A.V. Ferreira
R. Sheridan
Affiliation:
Department of Animal Sciences, Faculty of Agricultural and Forestry Sciences, University of Stellenbosch, Private Bag X1, Matieland, 7602, South Africa
A.V. Ferreira
Affiliation:
Department of Animal Sciences, Faculty of Agricultural and Forestry Sciences, University of Stellenbosch, Private Bag X1, Matieland, 7602, South Africa
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Abstract

Carcass measurements, commercial cuts and chemical composition of the meat of 32 Boer goat (BG) kids and 32 South African Mutton Merino (MM) lambs were investigated. Two pelleted diets (offered to 16 animals per species) with either a low (LE, 9·9 MJ/kg dry matter (DM)) or a high (HE, 121 MJ/kg DM) metabolizable energy level were offered, ad libitum, for either 28 or 56 days. Thereafter the animals were slaughtered and the carcasses dissected into South African commercial cuts. The 8-9-10-rib cut of each carcass was dissected and used for chemical analysis. MM had heavier carcasses (LE: 19·87w. 15·28 kg; HE: 2401 v 17·05 kg), and proportionally heavier ribs and buttocks than BG and therefore one can expect higher prices for sheep carcasses than for those of goats. BG had significantly more moisture and protein and lower fat and energy values than MM. DM, fat and energy values increased with an increase in slaughter age in both species. BG had significantly higher concentrations of 11 of the 18 measured essential amino acids in their 8-9-10-rib cuts than the MM. Goat carcasses had higher Ca, K, Mg, Na and P levels than sheep carcasses, regardless of the diet offered. BG had a lower carcass cholesterol content than lamb (66·77 v. 99·28 mg/100 g, respectively). Palmitic (C16: 0), stearic (C18: 0) and oleic (C18: 1n9) acids comprised the greatest proportions of the fatty acids in the 8-9-10-rib cut. On both diets there was a significantly higher saturated to unsaturated (SFA: UFA) fatty acid ratio in lamb than in goat meat (LE: 0·30 v 0·845; HE 1·407 v. 0·892). It can be concluded that chemically the meat from young feedlot goats is not inferior to that of lamb, and since it has a higher protein percentage and lower fat, cholesterol and SFA it can be considered as a healthy food commodity. Since diet had little or no significant influence on the carcass weight distribution or chemical composition of the goats, BGs can be finished on a LE-diet in the feedlot. This may decrease the food cost significantly.

Keywords

carcass compositioncholesterollambmeat cutsgoat meat
Type
Research Article
Information
Animal Science , Volume 76 , Issue 1 , February 2003 , pp. 63 - 71
Copyright
Copyright © British Society of Animal Science 2003

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References

American Oil Chemists Society. 1991. Fatty acid composition by GLC. AOCS official method (revised 1991) Ce 1b-89, pp. 1–5.Google Scholar
Association of Official Analytical Chemists. 1995. Official methods of analysis, 16th edition. AOAC International, Arlington, VA.Google Scholar
Babiker, S.A., El Khider, I.A. and Shafie, S.A. 1990. Chemical composition and quality attributes of goat meat and lamb. Meat Science 28: 273–277.CrossRefGoogle ScholarPubMed
Banskalieva, V., Sahlu, T. and Goetsch, A.L. 2000. Fatty acid composition of goat muscles and fat depots: a review. Small Ruminant Research 37: 255–268.CrossRefGoogle ScholarPubMed
Casey, N.H. 1982. Carcass and growth characteristics of four South African sheep breeds and the Boer goat. Ph. D. thesis, University of Pretoria, South Africa.Google Scholar
Casey, N.H. 1983. Bokvleis het ‘n onbekende waarde. SA Vleishandel 2: 4.Google Scholar
Casey, N.H., Van Niekerk, W.A. and Spreeth, E.B. 1988. Fatty acid composition of subcutaneous and kidney fat of sheep grazed on eight different pastures. Meat Science 23: 55–63.CrossRefGoogle Scholar
Flynn, M.A., Naumann, H.D., Nolph, G.B., Krause, G. and Ellersieck, M. 1985. The effect of meat consumption on serum lipids. Food Technology 39: 58–64.Google Scholar
Food and Agriculture Organization. 2001. FAOSTAT, May 2001. 17 October 2001.Google Scholar
Gaili, E.S. and Ali, A.E. 1985a. Meat from Sudan desert sheep and goats. 1. Carcass yield, offals and distribution of carcass tissues. Meat Science 13: 217–227.CrossRefGoogle ScholarPubMed
Gaili, E.S. and Ali, A.E. 1985b. Meat from Sudan desert sheep and goats. 2. Composition of the muscular and fatty tissues. Meat Science 13: 229–236.CrossRefGoogle ScholarPubMed
Hoffman, L.C. 2000. The yield and carcass chemical composition of impala (Aepyceros melampus), a southern African antelope species. Journal of the Science of Food and Agriculture 80: 752–756.3.0.CO;2-L>CrossRefGoogle ScholarPubMed
Kempster, A.J., Cuthbertson, A. and Harrington, G. 1982. Carcass structure and composition. In Carcass evaluation in livestock breeding, production and marketing. Granada Publishing, St Albans.Google Scholar
Krzynowek, J. 1985. Sterol and fatty acids in seafood. Food Technology 39: 61–68.Google Scholar
Lee, C.M., Trevino, B. and Chaiyawat, M. 1996. A simple and rapid solvent extraction method for determining total lipids in fish tissue. Journal of the Association of Official Analytical Chemists International 79: 487–492.Google ScholarPubMed
National Cholesterol Education Program. 1988. Report of the National Cholesterol Education Program expert panel on detection, evaluation, and treatment of high blood cholesterol in adults. Archive International Medicine 148: 36–69.Google Scholar
National Research Council. 1985. Nutrient requirements of sheep, fifth revised edition. National Academy of Sciences, Washington, DC.Google Scholar
Owen, J.E. and Norman, G.A. 1977. Studies of the meat production characteristics of Botswana goats and sheep. 2. General body composition, carcass measurements and joint composition. Meat Science 1: 283–306.CrossRefGoogle Scholar
Park, Y.W., Kouassi, M.A. and Chin, K.B. 1991. Moisture, total fat and cholesterol in goat organ and muscle meat. Journal of Food Science 56: 1191–1193.CrossRefGoogle Scholar
Rhee, K.S. 1992. Fatty acids in meats and meat products. In Fatty acids in foods and their health implications (ed. Chow, C.K.), pp. 65–93. Marcel Dekker Inc., New York.Google Scholar
Rowe, A., Macedo, F.A.F., Visentainer, J.V., Souza, N.E. and Matsushita, M. 1999. Muscle composition and fatty acid profile in lambs fattened in drylot or pasture. Meat Science 51: 283–288.CrossRefGoogle ScholarPubMed
Sheridan, R., Ferreira, A.V. and Hoffman, L.C. 2002. Production efficiency of SA Mutton merino lambs and Boer goat kids receiving either a low or a high energy feedlot diet. Small Ruminant Research In press.Google Scholar
Srinivasan, K.S. and Moorjani, M.N. 1974. Essential amino acid content of goat meat in comparison with other meats. Journal of Food Science Technology 11: 123–124.Google Scholar
Statistical Analysis Systems Institute. 1990. SAS/STAT user’s guide, version 6, fourth edition. SAS Inc., Cary, NC.Google Scholar
Thonney, M.L., Taylor, St C.S., Murray, J.I. and McClelland, T.H. 1987. Breed and sex differences in equally mature sheep and goats. 3. Muscle weight distribution. Animal Production 45: 277–290.Google Scholar
United States Department of Agriculture. 2001a. Goat, raw. November 1999. 21 May 2001.Google Scholar
United States Department of Agriculture. 2001b. Lamb, domestic, composite of trimmed retail cuts, separable fat, trimmed to 1⁄4 fat, choice, raw. November 1999. 21 May 2001.Google Scholar
Van Jaarsveld, J.A., Smuts, C.M., Tichelaar, H.Y., Kruger, M. and Benadé, A.J.S. 2000. Effect of palm oil on plasma lipoprotein concentrations and plasma low-density lipoprotein composition in non-human primates. International Journal of Food Science and Nutrition 51: S21–S30.CrossRefGoogle ScholarPubMed
Watson, C. 1994. Official and standardized methods of analysis, third edition. The Royal Society of Chemistry, Cambridge.Google Scholar
Webb, E.C., Bosman, M.J.C. and Casey, N.H. 1994. Dietary influence on subcutaneous fatty acid profiles and sensory characteristics in Dorper and SA Mutton Merino wethers. South African Journal of Food Science and Nutrition 6: 45–50.Google Scholar