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RESEARCH ARTICLE
Contents Vol 50(8)

Influence of finishing systems and sampling site on fatty acid composition and retail shelf-life of lamb

E. N. Ponnampalam A B G , R. D. Warner B , S. Kitessa C , M. B. McDonagh D , D. W. Pethick E , D. Allen B and D. L. Hopkins F
+ Author Affiliations
- Author Affiliations

A Australian Sheep Industry Cooperative Research Centre, Armidale, NSW 2350, Australia.

B Future Farming Systems Research Division, Department of Primary Industries, Werribee, Vic. 3030, Australia.

C CSIRO Livestock Industries, Private Bag 5, Wembley, WA 6913, Australia.

D Biosciences Research Division, Department of Primary Industries, Bundoora, Vic. 3083, Australia.

E Division of Vet and Biomedical Science, Murdoch University, WA 6150, Australia.

F Industry & Investment NSW (Primary Industries), Centre for Sheep Meat Development, PO Box 129, Cowra, NSW 2794, Australia.

G Corresponding author. Email: eric.ponnampalam@dpi.vic.gov.au

Animal Production Science 50(8) 775-781 https://doi.org/10.1071/AN10025
Submitted: 10 February 2010  Accepted: 27 May 2010   Published: 31 August 2010

Abstract

Thirty 7-month-old crossbred lambs (Poll Dorset × Border Leicester × Merino) finished over 5 weeks on either low quality pasture or grain-with-hay on a farm in southern Victoria were assessed for carcass parameters, muscle fat composition and retail colour stability. Lambs on the grain diet had a mix of barley grain (80%) and lentils (20%) at 800 g/head.day (air-dry basis ~ad libitum) with cape weed (Arctotheca calendula) hay available at all times. Lambs under grazing had predominantly rye grass (Lolium perenne) and barley grass (Hordeum leporinum) available ad libitum. Carcass weight tended to be higher (P = 0.14) in grain-fed lambs than in grass-fed lambs, but fatness indicated by GR (total muscle + fat tissue thickness at 11 cm from midline) did not differ between feeding systems. Fatty acid composition was determined in the loin from the forequarter (M. longissimus thoracis) and lumbar (M. longissimus lumborum) regions and from the leg region (M. semimembranosus). This showed that grain-finished lamb had higher muscle fat (P < 0.001) and omega-6 fatty acid (P < 0.001) content. Alpha-linolenic acid, eicosapentaenoic acid (EPA) or total omega-3 fat did not differ (P > 0.05) between feeding groups. Saturated fatty acids were greater (P < 0.01) in both loin sampling sites than the leg. The levels of EPA, docosahexaenoic acid and docosapentaenoic acid were lower (P < 0.01) in the forequarter (9%) or lumbar (11%) sites than the leg sampling site. The distribution pattern of fatty acids across the three sampling sites did not differ between feed types. Retail colour stability determined over 4 days of display (only performed in muscle from the lumbar site), evaluated by the redness (HunterLab a*-value) and metmyoglobin formation (reflectance ratio at 630 : 580-nm wavelengths) was superior for grass-fed lamb compared with short-term grain-finished lamb. The results demonstrate that the health claimable omega-3 fat mainly EPA or total omega-3 fat content in lamb was not altered by short-term grain finishing compared with lamb finished under pasture grazing conditions.

Additional keywords: meat colour stability, muscle fat composition, omega-3 fat, short-term grain finishing.


Acknowledgements

The funding for this study was provided by the Department of Primary Industries Victoria and the Australian Sheep Industry Cooperative Centre. The authors thank Andy Fuller for the support provided in the maintenance of lambs on-farm during this study. The cooperation of Herds Abattoir employees and management in Geelong with the animal slaughter and sample collection is gratefully acknowledged. Technical support towards sample collection and laboratory analysis was provided by Matthew Kerr and Athula Naththarampatha, DPI Victoria.


References


AUSMEAT (1990) ‘Handbook of Australian meat.’ 4th edn. (Australian Meat and Livestock Corporation: Sydney)

Buckley DJ, Morrissey PA, Gray JI (1995) Influence of dietary vitamin E on the oxidative stability and quality of pig meat. Journal of Animal Science 73, 3122–3130.
|  CAS | PubMed |
open url image1

Dang J (2007) Australian consumers: a marketer’s perspective. Nutrition & Dietetics 64, 111–112.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Department of Primary Industries (2007) Drought feeding and management of sheep. A guide for farmers and land managers. Department of Primary Industries, Catchment and Agriculture Services, The Victorian Government, Rutherglen.

Droulez V, Williams P, Levy G, Stobaus T, Sinclair A (2006) Composition of Australian red meat: fatty acid profile. Food Australia 58, 335–341. open url image1

Enser M, Hallett K, Hewett B, Fursey GAJ, Wood JD, Harrington G (1998) Fatty acid content and composition of UK beef and lamb in relation to production system and implications for human nutrition. Meat Science 49, 329–341.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Food Standard Australia New Zealand (2002) ‘Food Standard Code. Vol. 2.’ (Information Australia: Canberra)

Gatellier P, Mercier Y, Renerre M (2004) Effect of diet finishing mode (pasture or mixed diet) on antioxidant status of Charolais bovine meat. Meat Science 67, 385–394.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Gil M, Serra X, Gispert M, Oliver A, Sanudo M , et al . (2001) The effect of breed-production systems on the myosin heavy chain 1, the biochemical characteristics and the colour variables of Longissimus thoracis from seven Spanish beef cattle breeds. Meat Science 58, 181–188.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Givens DI, Gibbs RA (2006) Very long chain n-3 polyunsaturated fatty acids in the food chain in the UK and the potential of animal-derived foods to increase intake. Nutrition Bulletin 31, 104–110.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Givens DI, Cottrill BR, Davies M, Lee PA, Mansbridge RJ, Moss AR (2000) Sources of n-3 polyunsaturated fatty acids additional to fish oil for livestock diets – a review. Nutrition Abstracts and Reviews, Series B. Livestock Feeds and Feeding 70, 1–19. open url image1

Hood DE, Riordan EB (1973) Discolouration in pre-packaged beef: measurement by reflectance spectrometry and shopper discrimination. Journal of Food Technology 8, 333–343.
|  CAS | Crossref |
open url image1

Hopkins DL , Kerr MJ , Lamb TA , Jacob RH (2008) Aperture size considerations when measuring colour stability of lamb cuts. In ‘Proceedings 54th International Congress of Meat Science and Technology 9.6’. Cape Town, South Africa. pp. 1–3.

Howe P, Buckley J, Meyer B (2007) Long-chain omega-3 fatty acids in red meat. Nutrition & Dietetics 64, 135–139.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Jose CG , Pethick DW , Gardner GE , Jacob RH (2008) Vitamin E will improve the colour stability in lamb; a dose rate investigation. In ‘Proceedings 54th International Congress of Meat Science and Technology 9.6’. Cape Town, South Africa. pp. 1–3.

Kaur G, Begg DP, Barr D, Garg M, Cameron-Smith D, Sinclair AJ (2010) Short-term docosapentaenoic acid (DPA) supplementation increases tissue docosapentaenoic acid, DHA and EPA concentrations in rats. The British Journal of Nutrition 103, 32–37.
| Crossref | GoogleScholarGoogle Scholar | CAS | PubMed | open url image1

Kitessa S, Liu S, Briegel J, Pethick D, Gardner G , et al . (2010) Effects of intensive or pasture finishing in spring and linseed supplementation in autumn on the omega-3 content of lamb meat and its carcass distribution. Animal Production Science 50, 130–137.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Lamb TA , van de Ven R , Hopkins DL (2010) Importance of iron and omega-3 fatty acids to lamb consumers. In ‘Proceedings of the 28th Biennial Conference of the Australian Society of Animal Production’. In press.

Luciano G, Monahan FJ, Vasta V, Pennisi P, Bella M, Priolo A (2009) Lipid and colour stability of meat from lambs fed fresh herbage or concentrate. Meat Science 82, 193–199.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

MacDougall DB (1995) Colour of meat. In ‘Quality attributes and their measurement in meat, poultry and fish products’. (Eds AM Pearson, DR Dutson) pp. 79–93. (Aspen Publishers: Gaithersburg, MD)

McAfee AJ, McSorley EM, Cuskelly GJ, Moss BW, Wallace JMW, Bonham MP, Fearon AM (2010) Red Meat Consumption: an overview of the risks and benefits. Meat Science 84, 1–13.
| Crossref | GoogleScholarGoogle Scholar | CAS | PubMed | open url image1

Moure A, Cruz JM, Franco D, Dominguez JM, Sineiro J, Dominguez H, Nunez MJ, Parajo JC (2001) Natural antioxidants from residual sources. Food Chemistry 72, 145–171.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Noci F, Monahan FJ, French P, Moloney AP (2005) The fatty acid composition of muscle fat and subcutaneous adipose tissue of pasture-fed beef heifers: influence of the duration of grazing. Journal of Animal Science 84, 3228–3238. open url image1

Nuernberg K, Nuernberg G, Ender K, Dannenberger D, Schabbel W, Grumbach S, Zupp W, Steinhart H (2005) Effect of grass vs. concentrate feeding on fatty acid profile of different fat depots in lambs. European Journal of Lipid Science and Technology 107, 737–745.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

O’Fallon JV, Busboom JR, Nelson ML, Gaskins CT (2007) A direct method for fatty acid methyl ester synthesis: application to wet meat tissues, oils, and feedstuffs. Journal of Animal Science 85, 1511–1521.
| Crossref | GoogleScholarGoogle Scholar | CAS | PubMed | open url image1

Ponnampalam EN , Burnett VF , Norng S , Jacobs J (2010 a) Performance, carcass yield and muscle omega-3 fat content of lambs grazing perennial pasture or annual pasture with supplements during autumn season. In ‘Proceedings of the 28th Biennial Conference of the Australian Society of Animal Production’. In press.

Ponnampalam EN , Hopkins DL , Butler KL , Kitessa SM , Hocking-Edward J , Jacob RH , Pethick DW (2010 b) Alpha-linolenic acid (ALA) and its longer chain omega-3 derivatives (EPA, DPA and DHA) in meat from lambs reared under extensive grazing across several locations of Australia. In ‘Proceedings of the 56th International Congress of Meat Science and Technology’. Jeju, South Korea. In press.

Scollan N, Hocquette J, Nuernberg K, Dannenberger D, Richardson I, Moloney A (2006) Innovations in beef production systems that enhance the nutritional and health value of beef lipids and their relationship with meat quality: a review. Meat Science 74, 17–33.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Sinclair LA (2007) Nutritional manipulation of the fatty acid composition of sheep meat: a review. The Journal of Agricultural Science 145, 419–434.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Storlien LH, Pan DA, Kriketos AD, O’Connor J, Caterson ID, Cooney GJ, Jenkins AB, Baur LA (1995) Skeletal muscle membrane and storage lipids, muscle fibre type and insulin resistance. Proceedings of the Nutrition Society of Australia 19, 26–32.
|  CAS |
open url image1

Toohey ES, Hopkins DL, Stanley DF, Nielsen SG (2008) The impact of new generation pre-dressing medium-voltage electrical stimulation on tenderness and colour stability in lamb meat. Meat Science 79, 683–691.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Van Ranst G, Fievez V, De Riek J, Van Bockstaele E (2009) Influence of ensiling forages at different dry matters and silage additives on lipid metabolism and fatty acid composition. Animal Feed Science and Technology 150, 62–74.
| Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Williams P (2007) Nutritional composition of red meat. Nutrition & Dietetics 64, S113–S119.
| Crossref | GoogleScholarGoogle Scholar | open url image1