The Effects of Breed, Diet, Sex, Location and Slaughter Weight on Lamb Growth, Carcass Composition and Meat Flavor

Crouse, J. D.; Busboom, J. R.; Field, R. A.; Ferrell, C. L.

doi:10.2527/jas1981.532376x

Cited by 94 publications

(75 citation statements)

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“…No effects on flavour were found for live weight at slaughter, breeds and sex. This agrees with Crouse et al (1981) and Crouse, Ferrell, Field, Busboom, and Miller (1982) and Jeremiah et al (1998). Sweet intensity was not affected by live weight, breed, or sex.…”

Section: Toughness Juicinesssupporting

confidence: 75%

“…The heavy carcasses had more flavour intensity than the light ones. This has also been reported by Crouse, Busboom, Field, and Ferrel (1981); Butler-Hogg et al (1984) and Jeremiah et al (1998). However Sañ udo et al (1996, working with lambs of the Aragonesa breed designated as ''Ternasco de Aragó n'', which was the first Spanish fresh meat with denomination of origin did not find effects of slaughter weight on flavour.…”

Section: Sensory Qualitysupporting

confidence: 64%

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Lamb meat quality of two breeds with protected origin designation. Influence of breed, sex and live weight

et al. 2005

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Lamb meat quality of two Portuguese products was examined. The influences of slaughter weight, sex and breed on eating quality were evaluated. Data were obtained from 72 lambs of two different breeds with protected designation origin. In accord with the normal slaughter weight in the region three classes were considered: A: 9-14 kg live weight; B: 14-19 kg live weight and C: 19-24 kg live weight. pH of M. longissimus thoracis et lumborum muscle (MTL) was measured 1 h and 24 h after slaughter. Meat colour was estimated in the M. longissimus thoracis et lumborum muscle (MTL) muscle on the 12th rib using the L* a* b* system. Shear force was evaluated 72 h after slaughter. Sensorial analysis was assessed by a trained taste panel of 12 members. The pH values found could be considered within the normal pH range, between 5.5 and 5.9. When the pH measurement was made 24 h after slaughter, the heavy lambs had significant higher value than the light lambs. In relation to colour variables, live weight, sex and breed had no effect on the red index (a*). Lightness (L) decreased with increasing live weight and the light lambs had higher yellow index (b*) than the heavier lambs. Shear force increased with live weight and the Bragançano breed had a greater mean shear force than the Mirandesa (7.8 vs. 6.8 kg/cm 2 ). The heavy carcasses had more flavour intensity than the light ones. Mirandesa lambs had significantly lower values for toughness, stringy and odour intensity than Bragançana lambs.

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Section: Toughness Juicinesssupporting

confidence: 75%

Section: Sensory Qualitysupporting

confidence: 64%

Lamb meat quality of two breeds with protected origin designation. Influence of breed, sex and live weight

et al. 2005

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“…It is noteworthy, though, that in the present study, differences in ADG were only found for lambs that were weaned, adapted, and fed supplementation with milled corn proportional to 1% of their daily live weight, which can be corroborated by the results obtained by Crouse et al (1981), Azzarini et al (2001), Azeredo et al (2005a), Azeredo et al (2006), Rocha et al (2010), and Osório et al (2012), meaning that it is necessary to provide a good food supply so that uncastrated animals can express their greatest growth potential.…”

Section: Resultssupporting

confidence: 79%

“…At the same time, testosterone levels were higher in uncastrated and cryptorchid lambs. Crouse et al (1981), Azeredo et al (2005a), Azeredo et al (2005b), , Jardim et al (2007), and Osório et al (2012) state that in young sheep, the hormone effect may not be manifest and, consequently, there is no effect of castration and/or sex when feeding is deficient, mainly due to the lack of supplementation.…”

Section: Resultsmentioning

confidence: 99%

“…Crouse et al (1981) stated that a better performance of uncastrated than castrated males is to be expected, but especially when a high level of feeding is provided to lambs. This was not done in most of the present study, as the lambs were kept in an extensive rearing system on native pasture fields with a normal low availability of quality food, which may account for the nonobservable differences in total ADG.…”

Section: Resultsmentioning

confidence: 99%

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Blood testosterone level and growth of castrated, uncastrated, and cryptorchid lambs

Costa

Mendonça

Costa

et al. 2017

SCA

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The objective of this study was to evaluate the effects of sexual status on blood testosterone levels and its influence on lamb growth. A total of 49 Texel x Corriedale males, originating of single births, were divided into three groups: uncastrated (n = 16), castrated (n = 17) and cryptorchid (n = 16), in the State of Rio Grande do Sul, in extensive natural pasture, with feed supplementation after weaning. The effect of the sexual status was examined by analysis of variance. Uncastrated and castrated lambs showed higher body weight, thoracic perimeter, and body compactness between the 35 th and 203 th day of age. Uncastrated lambs had mean weight higher than cryptorchid lambs over the whole period. Cryptorchid lambs had an average weight gain greater than castrated lambs between the 203 rd and 259 th days. Castrated lambs had a higher body condition score on the 147 th day than the cryptorchid lambs, and on the 175 th and 203 rd days than uncastrated and cryptorchid lambs. Blood testosterone concentrations were higher in the uncastrated and cryptorchid lambs on the 203 rd and 231 st days and in the overall mean. The findings of this study showed that, with advancing age, the sexual status affects the testosterone production, not showing differences regarding growth at young ages. Key words: Castration. Cryptorchidism. Male hormone. Ovis aries. ResumoO estudo foi realizado com objetivo de avaliar os efeitos da condição sexual nos níveis sanguíneos de testosterona e sua influência no crescimento de cordeiros. Foram utilizados 49 machos cruza Texel x Corriedale, oriundos de partos simples, divididos em três grupos: não castrados (n=16), castrados (n=17) e induzidos ao criptorquidismo (n=16), criados na região do Bioma Pampa, no Estado do Rio Grande do Sul, em condições extensivas de pastagem natural, com suplementação alimentar após o desmame. Foi utilizada a análise de variância para avaliar o efeito da condição sexual. Cordeiros não castrados e castrados apresentaram valores superiores de peso corporal entre o 35º e o 203º dia de idade, assim como no perímetro torácico e compacidade corporal. Cordeiros não castrados foram superiores aos criptorquidas na média de peso no período total. Criptorquidas apresentaram ganho médio de peso superior aos castrados entre o 203º e 259º dias. Castrados apresentaram escore de condição corporal superior, no 147º dia em relação aos criptorquidas, e no 175º e 203º dias em relação a não castrados e criptorquidas. As concentrações de testosterona sanguínea foram superiores nos não castrados e criptorquidas no 203º e 231º dias e na média geral. Conclui-se que, com o avanço da idade, a condição sexual afeta a produção hormonal de testosterona não se observando diferenças em termos de crescimento em idades jovens. Palavras-chave: Castração. Criptorquidismo. Hormônio masculino. Ovis aries.

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The effect of castration on the headspace aroma components of cooked lamb

Sutherland

Ames

1995

J Sci Food Agric

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Abstract:Minced lamb samples (lean meat or adipose tissue) from 12-week-old ram lambs and wethers were fried in the absence of added fat. The headspace aroma components were isolated onto Tenax GC prior to thermal desorption. A total of 132 compounds were identified and a further 31 were partially characterised by GC-MS, 49 of which are reported here for the first time as components of sheep meat aroma. One of these, 4,6-dimethyl-l,3-oxathiane, which has not previously been reported in any meat, was associated with a 'stale/wet animal' odour. All aroma isolates were dominated by products of lipid degradation with aliphatic aldehydes present in the highest relative amounts. Certain branchedchain fatty acids have been implicated in the characteristic aroma of sheep meat, and 4-methyloctanoic and 4-methylnonanoic acids were identified at higher levels in the adipose tissue from entires than from wethers.

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The Effects of Breed, Diet, Sex, Location and Slaughter Weight on Lamb Growth, Carcass Composition and Meat Flavor

Cited by 94 publications

References 0 publications

Lamb meat quality of two breeds with protected origin designation. Influence of breed, sex and live weight

Lamb meat quality of two breeds with protected origin designation. Influence of breed, sex and live weight

Blood testosterone level and growth of castrated, uncastrated, and cryptorchid lambs

The effect of castration on the headspace aroma components of cooked lamb

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