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RESEARCH ARTICLE
Contents Vol 45(5)

The impact of processing on sensory and objective measurements of sheep meat eating quality

J. M. Thompson A F , D. L. Hopkins B , D. N. D’Souza C , P. J. Walker D , S. R. Baud D and D. W. Pethick F
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- Author Affiliations

A School of Rural Science and Agriculture, University of New England, Armidale, NSW 2351, Australia.

B New South Wales Agriculture, Centre for Sheep Meat Development, PO Box 129, Cowra, NSW 2794, Australia.

C Western Australian Department of Agriculture, 3 Baron Hay Court, South Perth, WA 6151, Australia.

D Victorian Institute of Animal Science, Victorian Department of Primary Industries, 600 Sneydes Road, Werribee, Vic. 3030, Australia.

E School of Veterinary Studies, Murdoch University, Murdoch, WA 6150, Australia.

F Corresponding author. Email: jthompso@metz.une.edu.au

Australian Journal of Experimental Agriculture 45(5) 561-573 https://doi.org/10.1071/EA03195
Submitted: 22 November 2003  Accepted: 12 October 2004   Published: 27 June 2005

Abstract

The impact of processing factors on sheep meat eating quality was investigated in an experiment in which stimulation (stimulation and no stimulation), chilling rate (fast and slow chilling) and carcass suspension (tenderstretch and normally hung by Achilles tendon) treatments were overlaid on 80 lamb and 40 mutton carcasses processed over 2 days, at 2 different abattoirs. Within each carcass, 3 muscles (M. longissimus thoracics et lumborum, biceps femoris and serratus ventralis) were collected from both sides and aged for 2 of 3 ageing periods (2, 5 or 14 days), before sensory testing for tenderness, juiciness, like flavour and overall liking, using a consumer taste panel. Processing treatments of stimulation and chilling were variable in their effect on the rates of pH and temperature decline and temperature at pH 6 (temp@pH6), between the 4 slaughter groups. Therefore chilling rate and electrical stimulation were considered as tools by which temp@pH6 could be manipulated, rather than as treatment effects per se.

Age category (lamb or mutton) had the largest impact on tenderness score, followed by muscle, ageing and carcass suspension. There were significant interactions for tenderness and overall liking scores between muscle × ageing, age category × muscle and carcass suspension × muscle (P<0.05). The magnitude of the tenderstretch advantage in sensory scores was a function of temp@pH6. In normally hung carcasses, the highest sensory scores were evident at about 21°C temp@pH6, with a decrease in sensory scores at high (>30°C) or low (<10°C) temp@pH6. There was a tendency for sensory scores (particularly for the like flavour score) to decline for the biceps femoris when it was stored for extended periods (14 days).

Additional keywords: palatability, consumer, electrical stimulation, tenderstretch, chilling rate, ageing, lamb, mutton.


Acknowledgments

Bernie Munro (NSW Department of Primary Industries) is thanked for sourcing the animals from both the New South Wales and Victorian properties. Andrew Blakely, Brianna Daly (University of New England), Bill O’Halloran, David Stanley and Jayce Morgan (NSW Department of Primary Industries) assisted with the Cowra slaughter. Cosign Pty Ltd was responsible for preparation of sensory and objective samples. The sensory testing was undertaken by Sensory Solutions Pty Ltd.


References


Anon.  (1992) ‘AUS-MEAT language.’ 4th edn. (Authority for Uniform Specification Meat and Livestock Australia: Sydney)

Bouton PE, Fisher AL, Harris PV, Baxter RI (1973) A comparison of the effects of some post-slaughter treatment on the tenderness of beef. Journal of Food Technology 8, 39–49. open url image1

Bouton PE, Harris PV (1972) The effects of some post-slaughter treatments on the mechanical properties of bovine and ovine muscle. Journal of Food Science 37, 539–543. open url image1

Bouton PE, Harris PV, Ratcliff D, Roberts DW (1978) Shear force measurements on cooked meat from sheep of various ages. Journal of Food Science 43, 1038–1039. open url image1

Bouton PE, Harris PV, Shorthose WR (1971) Effect of ultimate pH upon the water-holding capacity and tenderness of mutton. Journal of Food Science 36, 435–439. open url image1

Denhertogmeischke MJA, Smulders FJM, Vanlogtestijn JG, Vanknapen F (1997) Effect of electrical stimulation on the water-holding capacity and protein denaturation of two bovine muscles. Journal of Animal Science 75, 118–124.
| PubMed |
open url image1

Devine CE, Payne SR, Peachey BM, Lowe TE, Ingram JR, Cook JC (2002a) High and low rigor temperature effects on sheep meat tenderness and ageing. Meat Science 60, 141–146.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Devine CE, Payne SR, Wells RW (2002b) Effect of muscle restraint on sheep meat tenderness with rigor mortis at 18°C. Meat Science 60, 155–159.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Devine CE, Wahlgren MA, Tornberg E (1996) The effects of rigor temperature on shortening and meat tenderness. In ‘Proceedings of the 42nd international congress of meat science and technology’. pp. 396–397. (Lillehammer, Norway)

Dransfield E (1993) Modelling post-mortem tenderisation. IV. Role of calpains and calpastatin in conditioning. Meat Science 34, 217–234.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Eikelenboom G, Barnier VMH, Hoving-Bolink AH, Smulders FJM, Culioli J (1998) Effect of pelvic suspension and cooking temperature on the tenderness of electrically stimulated and aged beef, assessed with shear and compression tests. Meat Science 49, 89–99.
| Crossref |
open url image1

Fang SH, Nishimura T, Takahashi K (1999) Relationship between development of intramuscular connective tissue and toughness of pork during growth of pigs. Journal of Animal Science 77, 120–130.
| PubMed |
open url image1

Hopkins DL, Thompson JM (2001) The relationship between tenderness, proteolysis, muscle contraction and dissociation of actomyosin. Meat Science 57, 1–12.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Hopkins DL, Walker PJ, Thompson JM, Pethick DW (2005) Effect of sheep type on meat and eating quality of sheep meat. Australian Journal of Experimental Agriculture 45, 499–507. open url image1

Hostetler RL, Carpenter ZL, Smith GC, Dutson TR (1975) Comparison of post-mortem treatments for improving tenderness of beef. Applied Science and Engineering 40, 223–226. open url image1

Hwang IH, Thompson JM (2000) Effect of type and time of electrical stimulation on drip loss and meat colour in beef striploin. Asian–Australasian Journal of Animal Sciences 13((supplement July)), open url image1

Hwang IH, Thompson JM (2001) The interaction between pH and temperature decline early post-mortem on the calpain system and objective tenderness in electrically stimulated beef longissimus dorsi muscle. Meat Science 58, 167–174.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Hwang IH, Devine CE, Hopkins DL (2003) Review: the biochemical and physical effects of electrical stimulation on beef and sheep tenderness. Meat Science 65, 677–691.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Koohmaraie M (1996) Biochemical factors regulating toughening and tenderisation processes of meat. Meat Science 43, S193–S201.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Locker RH, Hagyard CJ (1963) A cold shortening effect in beef muscle. Journal of the Science of Food and Agriculture 14, 787–793. open url image1

McDonagh MB, Fernandez C, Oddy VH (1999) Hind-limb protein metabolism and calpain system activity influence post-mortem change in meat quality in lamb. Meat Science 52, 9–18.
| Crossref | GoogleScholarGoogle Scholar | open url image1

O’Halloran JM, Ferguson DM, Perry D, Egan AF (1998) Mechanism of tenderness improvement in tenderstretched beef carcases. In ‘Proceedings of the 44th international congress of meat science and technology’. pp. 712–713. (Barcelona, Spain)

Pearson AM, Young RB (1989) ‘Muscle and meat biochemistry.’ (Academic Press: San Diego)

Perry D, Thompson JM, Hwang IH, Butchers A, Egan AF (2001) Relationship between objective measurements and taste panel assessment of beef quality. Australian Journal of Experimental Agriculture 41, 981–989.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Russell BC, McAlister G, Ross IS, Pethick DW (2005) Lamb and sheep meat eating quality — industry and scientific issues and the need for integrated research. Australian Journal of Experimental Agriculture 45, 465–467. open url image1

SAS (1997) ‘Applied statistics and the SAS programming language.’ (SAS Institute Inc.: Cary, NC, USA)

Shorthose WR, Harris PV (1991) Effects of growth and composition on meat quality. In ‘Growth regulations in farm animals — advances in meat research. Vol. 7.’ (Eds AM Pearson, TR Dutson) pp. 515–554. (Elsevier Applied Science: London)

Shorthose WR, Powell V, Harris PV (1986) Influence of electrical stimulation, cooling rates and aging on the shear force values of chilled lamb. Journal of Food Science 51, 889–892. open url image1

Simmons NJ, Cairney JM, Daly CC (1996) Effect of pre-rigor temperature and muscle restraint on the biophysical properties of meat tenderness. In ‘Proceedings of the 43rd international congress of meat science and technology’. pp. 414–415. (Lillehammer, Norway)

Sørheim O, Idland J, Halvosen EC, Froystein T, Lea P, Hildrum KI (2001) Influence of beef carcass stretching and chilling rate tenderness of m. longissimus dorsi. Meat Science 57, 79–85.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Thompson JM (2002) Managing meat tenderness. Meat Science 62, 295–308.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Thompson JM, Gee A, Hopkins DL, Pethick DW, Baud SR, O’Halloran WJ (2005) Development of a sensory protocol for testing palatability of sheep meats. Australian Journal of Experimental Agriculture 45, 469–476. open url image1

Unruh JA, Kastner X, Kropf DH, Dikeman ME, Hunt MC (1986) Effects of low voltage electrical stimulation during exsanguination on meat quality and display colour stability. Meat Science 18, 281–293.
| Crossref | GoogleScholarGoogle Scholar | open url image1

Wenham LM, Fairburn SJ, McLeod K, Carse WA, Pearson AM, Locker RH (1973) Eating quality of mutton compared with lamb and its relationship to freezing practice. Journal of Animal Science 36, 1081–1087. open url image1

Wheeler TJ, Koohmaraie M (1999) The extent of proteolysis is independent of sarcomere length in lamb longissimus and psoas major. Journal of Animal Science 77, 2444–2451.
| PubMed |
open url image1