Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/2714
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dc.contributor.authorPethick, D Wen
dc.contributor.authorHopkins, D Len
dc.contributor.authorD'Souza, D Nen
dc.contributor.authorThompson, John Mitchellen
dc.contributor.authorWalker, P Jen
dc.date.accessioned2009-10-27T15:41:00Z
dc.date.issued2005en
dc.identifier.citationAustralian Journal of Experimental Agriculture, 45(5), p. 491-498en
dc.identifier.issn0816-1089en
dc.identifier.urihttps://hdl.handle.net/1959.11/2714en
dc.description.abstractThe aim of this work was to test the effects of animal age on consumer perceptions of sheep meat quality. Experiment 1 tested eating quality scores (tenderness, liking of flavour, juiciness and overall liking) derived from untrained consumers of grilled 'M. longissimus lumborum' (LL) or 'M. biceps femoris' (BF) derived from Merino ewes ranging from 8.5 to 68.5 months of age. The ewes were derived from one farm and all received a pelleted diet (60% hay, 30% lupin grain and 10% barley grain) that sustained growth between 118 and 173 g/day for at least 22 days pre-slaughter. In experiment 2 consumer testing of grilled LL and roasted BF and 'M. semimembranosis' (SM) was conducted on a commercial line of 12-month-old White Suffolk × Merino lambs (0 erupted incisor teeth) v. a line of Merino yearling sheep about 22 months old (with either 2 or 4 erupted incisor teeth). The results of experiment 1 showed a significant effect of muscle (LL>BF, P<0.001) and a cubic effect of animal age on the consumer scores for grilled steaks. The cubic relationship was due to meat from lamb (8.5 months) and hogget (20 months) having higher scores than those of older animals. There was a close relationship between the objective measures of tenderness and the consumer tenderness score (r2 = 0.53, P<0.001). Results of experiment 2 indicated no significant difference between the grilled LL for the crossbred lamb and 22-month-old (2–4 teeth) Merino yearling sheep. However, the consumer scores for the roasted BF and SM were significantly depressed in the 2–4 tooth yearling Merino categories. In conclusion, this work clearly underpins the current Australian definition of lamb, lamb having better eating-quality attributes than older animals with fully erupted permanent incisor teeth, particularly in muscles from across the carcass. However, this work also highlights the eating quality attributes of older sheep (6 or more permanent incisor teeth) particularly for the LL, and suggests that negative influences of flavour associated with older sheep meat are minimal when the product is served in the absence of subcutaneous and intermuscular fat. Finally, the results suggest the possibility of a new 'yearling' sheep meat category based on animals in the 2–4-tooth dentition category.en
dc.languageenen
dc.publisherCSIRO Publishingen
dc.relation.ispartofAustralian Journal of Experimental Agricultureen
dc.titleEffects of animal age on the eating quality of sheep meaten
dc.typeJournal Articleen
dc.identifier.doi10.1071/EA03256en
dc.subject.keywordsAnimal Managementen
local.contributor.firstnameD Wen
local.contributor.firstnameD Len
local.contributor.firstnameD Nen
local.contributor.firstnameJohn Mitchellen
local.contributor.firstnameP Jen
local.subject.for2008070203 Animal Managementen
local.subject.seo2008830310 Sheep - Meaten
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailjthompso@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordpes:2915en
local.publisher.placeCollingwood, Victoria, Australiaen
local.format.startpage491en
local.format.endpage498en
local.peerreviewedYesen
local.identifier.volume45en
local.identifier.issue5en
local.contributor.lastnamePethicken
local.contributor.lastnameHopkinsen
local.contributor.lastnameD'Souzaen
local.contributor.lastnameThompsonen
local.contributor.lastnameWalkeren
dc.identifier.staffune-id:jthompsoen
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:2790en
dc.identifier.academiclevelAcademicen
local.title.maintitleEffects of animal age on the eating quality of sheep meaten
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.relation.urlhttp://nla.gov.au/anbd.bib-an4599774en
local.description.statisticsepubsVisitors: 279<br />Views: 279<br />Downloads: 0en
local.search.authorPethick, D Wen
local.search.authorHopkins, D Len
local.search.authorD'Souza, D Nen
local.search.authorThompson, John Mitchellen
local.search.authorWalker, P Jen
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