Predicting the fatness of lamb carcasses from carcass wall thickness measured by ruler or by a total depth indicator (TDI) probe

Kirton, A. H.; Woods, Ella; Duganzich, D. M.

doi:10.1016/0301-6226(84)90059-9

Cited by 28 publications

(13 citation statements)

References 5 publications

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“…In contrast, GR which provides an indirect measure of overall carcass fatness is likely to be of far greater benefit than carcass weight for predicting saleable meat yield. While this study confrms the work of Kirton et al (1984) that GR is a useful measure of lamb carcass composition (in this case saleable lean rather than dissected lean), the results suggest that GR measurement is more precise when measured by a ruler over the 12th rib rather than a total measurement of tissue deoth between the ribs by the HGP. Kirton et al (1984) found that total tissue depth (measured by a probe), GR (measured by a ruler) and measurements of fat thickness over the m. longissimus thoracis all had similar precision and value for predicting carcass meat yield (Kempster etaI.1982;Garrett etal.19921' Jones et al1992) have shown conformation score to be of little value.…”

supporting

confidence: 58%

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The prediction of saleable meat yield in lamb carcasses

Jones¹,

Robertson²,

Price³

et al. 1996

Can. J. Anim. Sci.

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supporting

confidence: 58%

“…When carcass weight range is relatively narrow, it contributes little to the prediction of meat yield (Kirton et al 1984; Ganett et al 1992). In Canada, because the preferred weight for lamb carcasses is within the 20-28 kg range, including weight is unlkely to improve the precision of predicting saleable meat yield.…”

mentioning

confidence: 99%

The prediction of saleable meat yield in lamb carcasses

Jones¹,

Robertson²,

Price³

et al. 1996

Can. J. Anim. Sci.

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“…Carcass pH and temperature were determined 45 min post-mortem in the left longissimus thoracis muscle between the 11th and 12th thoracic vertebrae, using a Corning Model 4 pH-temperature meter (Corning Glass Works, Medfield, MA) equipped with an Ingold spear-type electrode (Ingold Messtechnik AG, Udorf, Switzerland), and warm carcass weights were recorded prior to chilling. Cold carcass weights, subjective conformation scores (5 point scale) for the leg, loin and shoulder regions and GR (body wall thickness between the 12th and 13th ribs, 11 cm from carcass midline; Kirton et al 1984) were determined after chilling at 1°C for 24 h. Yield grade was assessed based on conformation and GR according to Canadian lamb grading standards (Canada Gazette 1998).…”

Section: Individual Feeding Trial and Carcass Compositionmentioning

confidence: 99%

Effects of feeding transgenic canola on apparent digestibility, growth performance and carcass characteristics of lambs

Stanford¹,

Aalhus²,

Dugan³

et al. 2003

Can. J. Anim. Sci.

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. 2003. Effects of feeding transgenic canola on apparent digestibility, growth performance and carcass characteristics of lambs. Can. J. Anim. Sci. 83: 299-305. This study evaluated the effects of including meal from glyphosate-tolerant (Roundup-Ready ® ) canola (RRC) in barley-based diets for lambs on apparent digestibility of the diets, growth performance of the lambs, and carcass quality and composition. Four isonitrogenous diets were prepared that included canola meal [6.5%, dry matter (DM) basis] from four different sources (two commercially available canola blends, COM1 and COM2; a transgenic line, RRC and the parental non-transgenic line from which RRC was derived, PAR). Apparent digestibilities of the four diets were determined using eight mature wethers (67.8 ± 2.3 kg) in a replicated Latin square with four 21-d periods. No aspect of digestibility (DM, fibre, or nitrogen balance) was influenced by canola source. The growth trial involved 60 earlyweaned Arcott lambs (30 ewes; 30 wethers; initial age approximately 2 mo; initial weight 21.5 ± 1.0 kg). The lambs were blocked by weight and gender for assignment to treatments, and fed the diets until reaching or exceeding 45 kg body weight. Intake of DM was similar among lambs fed COM1, COM2 and PAR diets, and between PAR and RRC (COM1, COM2 > RRC, P < 0.05). Diet did not affect (P > 0.05) average daily gain or feed efficiency. Carcass yield grade was higher (P < 0.05) for COM1 and COM2 diets than for PAR or RRC, although carcass composition did not differ (P > 0.05) between PAR and RRC. Canola source did not affect (P > 0.05) meat tenderness, as determined by shear force, drip loss or intramuscular fat content. Meat colour of RRC-fed lambs did not differ from that of all other treatment groups. In this study, including canola meal prepared from glyphosate-tolerant canola did not alter diet digestibility, feed efficiency, growth performance, carcass characteristics or meat quality of lambs.Key words: Growth, lambs, meat quality, ruminant, transgenic canola Stanford, K., Aalhus, J. L., Dugan, M. E. R., Wallins, G. L., Sharma, R. et McAllister, T. A. 2003. Digestibilité apparente des aliments, performance de la croissance et paramètres de la carcasse chez les agneaux nourris de canola transgénique. Can. J. Anim. Sci. 83: 299-305. Les auteurs ont évalué l'incidence du tourteau de canola tolérant le glyphosate (Roundup-Ready ® ) (CTG) ajouté à la ration à base d'orge des agneaux sur la digestibilité apparente des aliments, la croissance des animaux ainsi que la qualité et la composition de la carcasse. Pour cela, ils ont préparé quatre rations isoazotées avec du tourteau de canola (6,5 % de la matière sèche (MS)) de quatre sources (deux mélanges de canola vendus dans le commerce, COM1 et COM2; une lignée transgénique, CTG; la lignée parentale non transgénique d'où était issue la précédente, PAR). Les auteurs ont établi la digestibilité apparente des quatre aliments avec huit moutons (67,8 ± 2,3 kg) dans le cadre d'une double expérience en carré latin menée pendan...

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“…Kidney fat (KlDF) was then removed and weighed. Tissue depth (GR; Kirton et al 1984), was measured in the chiller after slaughter. Rear leg measurements (F and T;Palsson 1939), carcass length (CL; Moxham & Brownlie 1976), chest width (WID), and buttock circumference (CIR) were recorded shortly after slaughter.…”

Section: Animalsmentioning

confidence: 99%