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Comparison of meat and carcass quality in organically reared and conventionally reared pasture-fed lambs

Published online by Cambridge University Press:  30 June 2011

S. Prache ,
P. Gatellier ,
A. Thomas ,
B. Picard  and
D. Bauchart
S. Prache*
Affiliation:
Institut National de la Recherche Agronomique (INRA), UR1213 Herbivores, Site de Theix, F-63122 Saint-Genès-Champanelle, France
P. Gatellier
Affiliation:
Institut National de la Recherche Agronomique (INRA), UR370 Qualité des Produits Animaux, Site de Theix, F-63122 Saint-Genès-Champanelle, France
A. Thomas
Affiliation:
Institut National de la Recherche Agronomique (INRA), UR1213 Herbivores, Site de Theix, F-63122 Saint-Genès-Champanelle, France
B. Picard
Affiliation:
Institut National de la Recherche Agronomique (INRA), UR1213 Herbivores, Site de Theix, F-63122 Saint-Genès-Champanelle, France
D. Bauchart
Affiliation:
Institut National de la Recherche Agronomique (INRA), UR1213 Herbivores, Site de Theix, F-63122 Saint-Genès-Champanelle, France
*
†E-mail: [email protected]
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Abstract

The ‘Organic’ product label guarantees a production process that avoids the use of synthetic fertilisers, pesticides and hormones and minimises recourse to pharmaceuticals or veterinary drugs; however, the product's quality remains an issue that needs to be addressed in response to consumer demand. Consequently, this study was conducted to compare the sensory and nutritional qualities of meat and carcasses from pasture-fed lambs reared organically (O) or conventionally (C). Mean lamb growth profile was kept similar between the two treatments to avoid confounding effects with lamb age or weight at slaughter. The experiment was conducted over 3 years (2005 to 2007) with 12 O and 12 C lambs each year. The O and C treatments differed in the level of on-pasture mineral N fertilisation inducing a higher proportion of white clover in the organic pasture than the conventional pasture. Lambs were slaughtered when they attained a fat class of 2 to 3, and carcass and meat quality were evaluated. Lambs were slaughtered at an average weight and age of 35.3 kg and 156 days in the O treatment, respectively, and 35.2 kg and 155 days in the C treatment, respectively. Sensory evaluation indicated that loin chops from the O treatment had a higher level of abnormal fat odour compared with the C treatment. Carcasses from the O treatment had a softer subcutaneous fat one among 3 years (2007) compared to the C treatment. These results are probably due to a higher proportion of white clover in the diet. Organically reared lambs did offer the slight advantage of muscle fatty acid containing a higher level of stearic acid, which may have positive effects in the prevention of cardiovascular disease in humans. This may be the result of a higher rumen bio-hydrogenation of C18:3n-3 due to differences in the botanical composition between the O and the C pasture. Production system had no effect on the colour characteristics of the meat and subcutaneous fat, except lightness of subcutaneous dorsal fat, which was slightly higher in the O lambs. There were no differences between O and C lambs in terms of colour stability and lipid oxidation of the meat during the 6-day refrigerated storage under gas-permeable film.

Keywords

organic farminglambmeatfatty acidspasture-feeding
Type
Full Paper
Information
animal , Volume 5 , Issue 12 , 10 November 2011 , pp. 2001 - 2009
Copyright
Copyright © The Animal Consortium 2011

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References

Angood, KM, Wood, JD, Nute, GR, Whittington, FM, Hughes, SI, Sheard, PR 2008. A comparison of organic and conventionally-produced lamb purchased from three major UK supermarkets: price, eating quality and fatty acid composition. Meat Science 78, 176–184.CrossRefGoogle ScholarPubMed
Aufrère, J, Michalet-Doreau, B 1983. In vivo digestibility and prediction of digestibility of some by-products. In Feeding value of some by-products and their use by beef cattle (ed. C Boucqué), pp. 25–35. EEC Seminar EUR 8918 EN, Melle-Gontronde, Belgium.Google Scholar
Aurousseau, B, Bauchart, D, Calichon, E, Micol, D, Priolo, A 2004. Effect of grass or concentrate feeding systems and rate of growth on triglyceride and phospholipid and their fatty acids in the M. longissimus thoracis of lambs. Meat Science 66, 531–541.Google Scholar
Aurousseau, B, Bauchart, D, Faure, X, Galot, AL, Prache, S, Micol, D, Priolo, A 2007a. Indoor fattening of lambs raised on pasture: 1) Influence of stall finishing duration on lipid classes and fatty acids in the longissimus thoracis muscle. Meat Science 76, 241–252.Google Scholar
Aurousseau, B, Bauchart, D, Galot, AL, Prache, S, Micol, D, Priolo, A 2007b. Indoor fattening of lambs raised on pasture: 2) Influence of stall finishing duration on triglyceride and phospholipid fatty acids in the longissimus thoracis muscle. Meat Science 76, 417–427.CrossRefGoogle ScholarPubMed
Bauchart, D, Vérité, R, Rémond, D 1984. Long-chain fatty acid digestion in lactating cows fed fresh grass from spring to autumn. 6th International Symposium on Ruminant Physiology, Banff (Canada), September 1984. Canadian Journal of Animal Science 64, 330–331.CrossRefGoogle Scholar
Daget, P, Poissonnet, P 1971. Une méthode d'analyse phytosociologique des prairies. Critères d'application. Annales Agronomiques 22, 5–41.Google Scholar
European Food Safety Authority 2010. Scientific opinion on dietary reference values for fats, including saturated fatty acids, polyunsaturated fatty acids, monounsaturated fatty acids, trans fatty acids, and cholesterol. European Food Safety Authority Journal 8, 1461–1465.Google Scholar
Fisher, AV, de Boer, H 1994. The EAAP standard method of sheep carcass assessment. Carcass measurements and dissection procedures report of the EAAP working group on carcass evaluation, in cooperation with the CIHEAM Instituto Agronomico Mediterraneo of Zaragoza and the CEC Directorate General for Agriculture in Brussels. Livestock Production Science 38, 149–159.Google Scholar
Fisher, AV, Enser, M, Richardson, RI, Wood, JD, Nute, GR, Kurt, E, Sinclair, LA, Wilkinson, RG 2000. Fatty acid composition and eating quality of lamb types derived from four diverse breed × production systems. Meat Science 55, 141–147.Google Scholar
Folch, J, Lees, M, Stanley, GHS 1957. A simple method for the isolation and purification of total lipids from animal tissue. Journal of Biological Chemistry 226, 497–509.CrossRefGoogle Scholar
Glass, RL 1971. Alcoholysis, saponification and the preparation of fatty acid methyl esters. Lipids 6, 919–925.CrossRefGoogle Scholar
Lairon, D 2009. La qualité des produits de l'agriculture biologique. Innovations Agronomiques 4, 281–287.Google Scholar
Laville, E, Bouix, J, Sayd, T, Eychenne, F, Marcq, F, Leroy, PL, Elsen, JM, Bibé, B 2002. La conformation bouchère des agneaux. Etude d'après la variabilité génétique entre races. INRA Productions Animales 15, 53–66.Google Scholar
Legrand, P, Bourre, JM, Descomps, B, Durand, G, Renaud, S 2001. Lipides. In Apports nutritionnels conseillés pour la population française, pp. 63–82. Editions Tec & Doc, Paris.Google Scholar
Leroux, J, Fouchet, M, Haegelin, A 2009. Elevage bio: des cahiers des charges français à la réglementation européenne. INRA Productions Animales 22, 151–160.Google Scholar
Lourenço, M, Van Ranst, G, De Smet, S, Raes, K, Fievez, V 2007. Effect of grazing pastures with different botanical composition by lambs on rumen fatty acid metabolism and fatty acid pattern of longissimus muscle and subcutaneous fat. Animal 1, 537–545.Google Scholar
Lynch, SM, Frei, B 1993. Mechanisms of copper- and iron- dependent oxidative modification of human low-density lipoprotein. Journal of Lipid Research 34, 1745–1751.CrossRefGoogle ScholarPubMed
Mensink, RP, Zock, PL, Kester, AD, Katan, MB 2003. Effects of dietary fatty acids and carbohydrates on the ratio of serum total to HDL cholesterol and on serum lipids and apolipoproteins: a meta-analysis of 60 controlled trials. American Journal of Clinical Nutrition 77, 1146–1155.Google Scholar
Mercier, Y, Gatellier, P, Viau, M, Remignon, H, Renerre, M 1998. Effect of dietary fat and vitamin E on lipid and protein oxidation in turkey meat during storage. Meat Science 48, 301–317.Google Scholar
Petron, MJ, Raes, K, Claeys, E, Lourenço, M, Fremaut, D, De Smet, S 2007. Effect of grazing pastures of different botanical composition on antioxidant enzyme activities and oxidative stability of lamb meat. Meat Science 75, 737–745.Google Scholar
Prache, S, Thériez, M 1988. Production d'agneaux à l'herbe. INRA Productions Animales 1, 25–33.Google Scholar
Renerre, M 2000. Oxidative processes and myoglobin. In Antioxidants in muscle foods, Wiley-Interscience, pp. 113–133. A John Wiley & Sons, Inc., Publication, New York, Chichester, Weinheim, Brisbane, Singapore, Toronto.Google Scholar
Rousset-Akrim, S, Young, OA, Berdagué, JL 1997. Diet and growth effects in panel assessment of sheepmeat odour and flavour. Meat Science 45, 169–181.CrossRefGoogle ScholarPubMed
Russel, AJF, Doney, JM, Gunn, RG 1969. Subjective assessment of body fat in live sheep. Journal Agricultural Science 72, 451–454.CrossRefGoogle Scholar
Santé-Lhoutellier, V, Engel, E, Gatellier, P 2008. Assessment of the influence of diet on lamb meat oxidation. Food Chemistry 109, 573–579.Google Scholar
Schreurs, NM, Marotti, DM, Tavendale, MH, Lane, GA, Barry, TN, Lopez-Villalobos, N, Mcnabb, WC 2007a. Concentration of indoles and other rumen metabolites in sheep after a meal of fresh white clover, perennial ryegrass or Lotus corniculatus and the appearance of indoles in the blood. Journal of the Science of Food and Agriculture 87, 1042–1051.CrossRefGoogle Scholar
Schreurs, NM, Mcnabb, WC, Tavendale, MH, Lane, GA, Barry, TN, Cummings, T, Fraser, K, Lopez-Villalobos, N, Ramirez-Restrepo, CA 2007b. Skatole and indole concentration of fat from lambs that had grazed perennial ryegrass/white clover pasture or Lotus corniculatus. Animal Feed Science and Technology 138, 254–271.CrossRefGoogle Scholar
Scislowski, V, Durand, D, Gruffat, D, Motta, C, Bauchart, D 2004. Linoleate supplementation in steers modifies lipid composition of plasma lipoproteins but does not alter their fluidity. British Journal of Nutrition 91, 575–584.Google Scholar
Seidel, C, Deufel, T, Jahreis, G 2005. Effects of fat-modified dairy products on blood lipids in humans in comparison with other fats. Annals of Nutrition and Metabolism 49, 42–48.Google Scholar
Statistical Analysis Systems Institute 1999. SAS/STAT user's guide, version 8. SAS Institute Inc., Cary, NC.Google Scholar
Tholstrup, T 2005. Influence of stearic acid on haemostatic risk factors in humans. Lipids 40, 1229–1235.Google Scholar