Animal performance, carcass traits and meat characteristics of Assaf and Merino×Assaf growing lambs

Rodríguez, Ana Belén; Bodas, Raúl; Landa, Roberto; López-Campos, Ó.; Mantecón, Ángel R.; Giráldez, Francisco Javier

doi:10.1016/j.livsci.2010.11.020

Cited by 31 publications

(32 citation statements)

References 27 publications

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“…These findings are in agreement with those of Rodríguez et al (2011) in Spain who reported that carcass conformation was improved by crossbreeding.…”

Section: Discussionsupporting

confidence: 93%

“…Several schemes utilizing local sheep breeds were applied in Morocco: purebreeding, crossbreeding including two local breeds, mainly the prolific D'man breed, two-or threeway terminal crossbreeding (Boujenane et al 1998;Boujenane and Kansari 2002;Boujenane 2012a, b). Generally, terminal crossbreeding was found to improve slaughter and carcass traits of crossbred lambs from local breeds (Boujenane et al 1996;El Fadili et al 2001;Abdullah et al 2010;Rodríguez et al 2011).…”

Section: Introductionmentioning

confidence: 99%

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Growth at fattening and carcass characteristics of D’man, Sardi and meat-sire crossbred lambs slaughtered at two stages of maturity

Boujenane

2015

Trop Anim Health Prod

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The objective of this study was to evaluate growth at fattening, carcass characteristics and carcass measurements of 19 Sardi, 19 D'man and 52 meat-sire crossbred lambs of both sexes slaughtered at 50 and 70 % of mature weight. Crossbred lambs were born from Sardi, D'man and F1 Sardi × D'man ewes mated to meat-breed rams (Ile de France and Mérinos Précoce). Lambs of each group (breed type by sex) were chosen at random and slaughtered either at 50 or 70 % of mature weight. Sardi and D'man purebred lambs had significantly lower growth at fattening, pre-slaughter live weight, empty body weight, hot carcass weight, carcass conformation, carcass fatness, red offal, white offal, sub-products and non-carcass fat than meat-sire crossbred lambs. Differences were 42.2 g/day, 5.03 kg, 4.46 kg, 2.57 kg, 0.96, 0.59, 0.18 kg, 0.39 kg, 0.63 kg and 0.12 kg, respectively. B and Wr measurements of meat-sire crossbred lambs were higher than those of Sardi and D'man purebred lambs, whereas the F measurement was in favour of purebreds. Likewise, CC, G/F and Wr/Th indices of meat-sire crossbreds were higher than those of purebreds; however, the opposite was observed for L/G and Th/G indices. Maternal heterosis was positive and not significant for most traits, negative and not significant for few traits (P > 0.05), but negative and significant for the proportion of sub-products (P < 0.05). It was concluded that growth and carcass characteristics of local sheep can be significantly improved by terminal crossbreeding.

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“…These findings are in agreement with those of Rodríguez et al (2011) in Spain who reported that carcass conformation was improved by crossbreeding.…”

Section: Discussionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Growth at fattening and carcass characteristics of D’man, Sardi and meat-sire crossbred lambs slaughtered at two stages of maturity

Boujenane

2015

Trop Anim Health Prod

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“…The pH meter was calibrated before taking measurements using pH 4, pH 7 and pH 9 standards solutions (CRISON Instruments, Spain). The carcases were classified as normal (pH <5.7) or as dry firm dark (DFD) mutton (pH >5.7) (Rodríguez et al, 2011). The L*; a, and b* values were determined at the butchery 24 hours after slaughter using a Minolta colourguide 45/0 BYK-Gardener GmbH machine with a 20 mm diameter measurements area and illuminant D65-day light, 10º standard observer.…”

Section: Methodsmentioning

confidence: 99%

“…Animal-related factors affecting meat quality include age, breed and the sex of the animal (MartinezCerezo et al, 2005;Du Plessis & Du Rand, 2012). Cloete et al (2008) reported that breed had an effect on carcass composition of meat while Ljungberg et al (2007) and Rodríguez et al (2011) reported that the preslaughter environment, loading, transportation; unloading and the period of stay at the lairages affect the quality of meat.…”

Section: Introductionmentioning

confidence: 99%

“…Studies (Miranda-de la Lama et al, 2009;Rodríguez et al, 2011) conducted around this topic have been executed in controlled experimental environments where conditions were controlled. Meanwhile animals under practical conditions do not get enough recovery time due to management practices at the abattoir (Assylyng et al, 2001;Engstrom et al, 2010;Chulayo, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Effect of pre-slaughter conditions on physico-chemical characteristics of mutton from three sheep breeds slaughtered at a smallholder rural abattoir

Chulayo

Muchenje

2014

SA J. An. Sci.

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The effects of pre-slaughter conditions and breed on physico-chemical characteristics of mutton were determined. The study was conducted at Adelaide Municipal abattoir in the Eastern Cape Province, South Africa. Records were taken from 84 sheep from the South African Mutton Merino, Blackhead Persian and Dorper breeds as identified on arrival at the abattoir. The South African Mutton Merino (SAMM) had the highest values for meat pH at 24 hours (pH 24 ) (5.9 ± 0.64), lightness; L* (34.2 ± 0.97), yellowness; b* (12.2 ± 0.50) and Warner-Braztler shear force WBSF (26.8 ± 1.51). Linear relationships were also observed between pre-slaughter variables and physico-chemical characteristics of mutton. Principal Component Analysis (PCA) showed a large variation being contributed by meat pH 24 and L*. It was therefore concluded that, transport time and lairage duration negatively affected the quality of mutton. Furthermore, breed affected the physico-chemical characteristics of meat.

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Influence of age at entry and level of concentrate feeding on growth and carcass characteristics of feedlot-finished Tanzanian long-fat-tailed sheep

Shirima

Mtenga

Kimambo

et al. 2014

Trop Anim Health Prod

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A 4×3 factorial experiment was carried out to evaluate the effects of age at entry to feedlot (AEF) and levels of concentrate feeding (LCF) on body weight gain, feed utilization and killing out characteristics of Tanzanian longfat-tailed castrate sheep. The AEF points were 9, 12, 15 and 18 months, designated as AEF9, AEF12, AEF15 and AEF18, and the LCF were 50, 75 and 100 % of ad libitum concentrate intake designated as LCF50, LCF75 and LCF100, the last representing ad libitum concentrate intake with 10 % refusal rate. Grass hay as basal diet was offered ad libitum to each sheep. Daily feed intake and weekly live weight were recorded for a period of 84 days. Animals were slaughtered and carcass and non-carcass parameters were recorded. Dry matter intake (DMI) of hay decreased while DMI of concentrate increased (p<0.01) with increasing LCF. Daily gain in high level (LCF100) was 93.1 g/day, almost twofold higher than that in low level (LCF50) of feeding (39 g/day). Overall dressing percentage ranged from 40.7 to 46.5 % and increased with increasing AEF. The proportion of carcass bone decreased (p<0.05) with increasing AEF while that of fat increased (p<0.05) with increasing LCF. Age at entry × level of concentrate feeding interaction was detected for DMI, feed conversion ratio (FCR), slaughter body weight (SBW), muscle/bone ratio and bone (as % cold carcass weight (CCW)), but the effect was not regular. Entering fattening at 18th month seems too late, hence to get in the shortest time the highest output slaughter and carcass weights, fattening should start latest at 15 month.

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Animal performance, carcass traits and meat characteristics of Assaf and Merino×Assaf growing lambs

Cited by 31 publications

References 27 publications

Growth at fattening and carcass characteristics of D’man, Sardi and meat-sire crossbred lambs slaughtered at two stages of maturity

Growth at fattening and carcass characteristics of D’man, Sardi and meat-sire crossbred lambs slaughtered at two stages of maturity

Effect of pre-slaughter conditions on physico-chemical characteristics of mutton from three sheep breeds slaughtered at a smallholder rural abattoir

Influence of age at entry and level of concentrate feeding on growth and carcass characteristics of feedlot-finished Tanzanian long-fat-tailed sheep

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