Effect of pre-slaughter fasting on liveweight, carcass weight, and carcass composition of Southdown ram lambs

Kirton, A. H.; Clarke, J. N.; Carter, A. H.

doi:10.1080/00288233.1967.10423076

Cited by 24 publications

(8 citation statements)

References 9 publications

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“…Entretanto, KIRTON et al (1967) relatam que, quando as comparações são efetuadas em igual estado de maturidade, a maioria das diferenças entre raças desaparece, corroborando, assim, os resultados obtidos neste experimento.…”

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Efeito do genótipo sobre as medidas objetivas e subjetivas da carcaça de cordeiros terminados em confinamento

Siqueira

Fernandes

2000

R. Bras. Zootec.

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RESUMO -Este experimento foi realizado para comparar as medidas objetivas e subjetivas da carcaça de 36 cordeiros, 18 da raça Corriedale e 18 mestiços (F1) Ile de France x Corriedale, abatidos com 30 a 32 kg PV. Os cordeiros foram desmamados aos 60 dias de idade, com 10 a 12 kg PV, e terminados em regime de confinamento total, no qual dispunham, à vontade, de uma ração com 15,0% PB e 70,0% NDT. Terminada a manipulação pós-abate e o resfriamento por 24 horas a 4°C, avaliações objetivas e subjetivas nas carcaças foram realizadas. Houve diferenças entre os grupos genéticos estudados somente quanto ao comprimento externo e interno da carcaça, tendo os cordeiros puros apresentado maiores valores para essas medidas. Entretanto, por meio da média geral constatada para a área do longissimus dorsi, foi observado que os dois grupos genéticos apresentaram a mesma quantidade de músculo na carcaça. As carcaças dos cordeiros mestiços (IF x C) foram consideradas de melhor conformação e apresentaram a mesma quantidade de gordura de cobertura que as de inferior conformação. Os genótipos estudados, de maneira geral, foram capazes de atender dois importantes requisitos: a exigência do mercado consumidor por carcaças que não apresentem excesso de tecido adiposo e a necessidade de pequena cobertura de gordura, para que a qualidade da carne não seja prejudicada.Palavras-chave: carcaça, carne ovina, cordeiro, cruzamento Effect of Objective and Subjective Measurements of Carcasses from Lambs Finished in FeedlotABSTRACT -This experiment was carried out to compare the objective and subjective measurements of carcasses from 18 Corriedale and 18 Ile de France x Corriedale lambs, slaughtered at 30 to 32 kg LW. The lambs were weaned at 60 days of age, with 10 to 12 kg LW, finished in feedlot, and were full fed a diet with 15,0% CP and 70,0% TDN. After post-slaughter manipulation and cooled for 24 hours at 4°C, the objective and subjective carcass evaluations were made. There were differences between the studied genotype groups only for carcass external and internal length. The straightbreds lambs presented higher values for those measurements. However, by the overall mean observed for the longissimus dorsi area, the genotype groups presented the same amount of muscle in the carcass. The crossbred lamb carcass (IF x C) were considered to have the best conformation and presented the same subcutaneous fat cover of that of pour conformation. The studied genotype groups, in overall, were capable to meet two important demand of meat market requirements for lean carcass but with small subcutaneous fat cover to conserve the meat quality.Key Words: carcass, lamb meat, lamb, crossbreeding Rev. bras. zootec., 29(1):306-311, 2000 1 Projeto financiado pela FAPESP. 2 Professor Adjunto do DPEA -FMVZ/UNESP -18618-000, Botucatu/ SP. Fax: (0XX14) 8207180. E. mail: e.r.siqueira@fca.unesp.br 3 Zootecnista -DPEA -FMVZ/UNESP -18618-000, Botucatu/ SP. IntroduçãoO estudo dos aspectos qualitativos das carcaças ovinas produzidas nas distintas regiões criatórias reves...

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Efeito do genótipo sobre as medidas objetivas e subjetivas da carcaça de cordeiros terminados em confinamento

Siqueira

Fernandes

2000

R. Bras. Zootec.

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“…After the first year of the trial, a cut leg length (cm) was taken as the shortest distance between the table surface and the tip of the leg when placed perpendicular on the surface where sectioned from the side. Subcutaneous fat depths were taken on the cut surface of the leg over the spinal column (LI), over the flank (L2), and L3 was measured as the greatest depth over the gluteus medius muscle approximately midway between LI and L2 (see Kirton et al (1967a) for these and shoulder subcutaneous fat measurements).…”

Section: Carcass Analysesmentioning

confidence: 99%

“…Subcutaneous fat thickness (SI) was measured over the trapezius muscle, above the deepest point of the longissimus muscle (S3), and fat depth S2 was measured over the latissimus dorsi muscle (Kirton et al 1967a). The flap was removed from the mid section of the carcass (loin and rack) by a cut parallel to the ventral surface (Kirton et al 1967b) and the loin was removed from the rack by a cut between the last thoracic and first lumbar vertebrae perpendicular to the vertebral column.…”

Section: Carcass Analysesmentioning

confidence: 99%

A comparison between 15 ram breeds for export lamb production 1. Liveweights, body components, carcass measurements, and composition

Kirton

Carter

Clarke

et al. 1995

New Zealand Journal of Agricultural Research

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Results on the body and carcass composition of 7885 lambs sired by 371 rams of 15 different breeds mated to Romney cast-for-age ewes are given. Trials were run at the Ruakura Agricultural Centre and the Manutuke Research Station from 1963 to 1972. Lambs of the different breeds were slaughtered at the same average age so that differences between breeds/crosses in liveweight and carcass weight reflected differences in growth rate. Ranked from heaviest to lightest mean age-adjusted carcass weights, lambs sired by the Dorset Horn, Poll Dorset, Hampshire, Border Leicester, Suffolk, Dorset Down, South Suffolk, and South Dorset Down produced the heaviest carcasses, and those sired by the Cheviot, Southdown, English Leicester, and Ryeland were intermediate. The Lincoln, Merino, and Romney sired carcasses were lighter. The longer-woolled Romney, Merino, and Lincoln had lowest dressingout percentages based on full liveweights and the short finer-wooled breeds such as the Southdown, Dorset Down, and Poll Dorset/Dorset Horn dressed 2-3% higher. When compared at the same carcass weight, lambs sired by the Southdown followed by the Ryeland had the fattest carcasses and those A94091Received 26 September 1994; accepted 27 April 1995 1 Deceased sired by the Suffolk, Cheviot, and Dorset Horn produced the least fat, leanest carcasses. The Southdown, Dorset Horn, South Dorset Down, and Poll Dorset crosses had the largest eye muscle areas for carcasses of similar weight.

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“…A.B. 1943;Kirton et al 1965; Kirton et al 1967a;Kirton et al 1968;Kirton et al 1971a), but is unlikely to be of importance in mature cattle (Kirton et al 1972a). Approximately a million bobby calves are slaughtered annually in New Zealand (Anon.…”

Section: Introductionmentioning

confidence: 99%

Effects of starvation before slaughter on some body components of bobby calves

Kirton

Paterson

1973

New Zealand Journal of Experimental Agriculture

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The effect of 0, I, 2, and 3 days' starvation was studied on 110 bobby calves, 3 to 12 days old. Weight reductions of carcass and other components of the young calves were proportionately greater than has previously been recorded for lambs and adult cattle. One day's starvation reduced carcass weight by 0.7 kg (5%) and liver weight by 0.2 kg (22%). These results are relevant to the bobby calf industry, whose calves are normally starved for at least one day before slaughter.

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Effect of pre-slaughter fasting on liveweight, carcass weight, and carcass composition of Southdown ram lambs

Cited by 24 publications

References 9 publications

Efeito do genótipo sobre as medidas objetivas e subjetivas da carcaça de cordeiros terminados em confinamento

Efeito do genótipo sobre as medidas objetivas e subjetivas da carcaça de cordeiros terminados em confinamento

A comparison between 15 ram breeds for export lamb production 1. Liveweights, body components, carcass measurements, and composition

Effects of starvation before slaughter on some body components of bobby calves

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