Implications of removing or altering the testicles of ram lambs on the financial returns from carcasses

Fisher, M. W.; Bray, AR; Johnstone, PD

doi:10.1080/00288231003777673

Cited by 5 publications

(3 citation statements)

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“…Among them, castration facilitates the management, decreases aggressive behavior, and improve carcass characteristics, mainly through greater fat deposition and carcass yield, which can influence the commercial value of meat (Fisher, Bray, & Johnstone, 2010;Fogarty & Mulholland, 2012).Castration also reduces sheep aroma and flavor, but non-castrated fed intensively for short time should also produce meat without bad taste and with enough fat deposition. Animals that remain less time on feed and are harvested earlier might have less influence of sexual condition in carcass and meat characteristics.…”

Section: Introductionmentioning

confidence: 99%

<b>Time on feedlot and sexual effects on animal performance and characteristics of lamb’s meat

Mazon

Carvalho

Pesce

et al. 2017

Acta Sci. Anim. Sci.

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ABSTRACT. For this research 48 male lambs were divided in randomized blocks in a factorial design, having as factors sexual condition (castrated or uncastrated) and time on feed (36 or 78 days). High grain diet was monitored daily to measure the performance of the animal nutrition. The characteristics of the carcass and meat were taken for the fatty acids profile and sensorial analysis. The effect of the factors as sexual condition and time on feed, and the interaction between them, were evaluated by analysis of variance using the GLM procedure of SAS software and the treatment averages were compared by Student's T test. The uncastrated animals presented greater weight gain and dry matter intake, better feed efficiency, and larger loin area. More time on feed resulted in higher weight at slaughter. Parameters such as pH, color, meat tenderness and sensorial attributes were not affected by treatments. For the fatty acid profile there was effects and interactions between sexual condition and time on feed. It is concluded that castration should not be used when the animal is young and slaughtered and feed intensively, but neutering can be interesting to improve the fatty acid profile of the meat.Keywords: castrated, Dorper, fatty acids, meat, Santa Inês, sheep.Período de confinamento e efeito do sexo sobre o desempenho e características de qualidade da carne de cordeiros RESUMO. No experimento realizado, foram utilizados 48 cordeiros machos divididos em blocos casualizados, em esquema fatorial, sendo tais fatores: a condição sexual (castrado ou não castrado) e tempo de confinamento (36 ou 78 dias). Uma dieta rica em grãos foi ofertada e controlada diariamente para medir o desempenho da nutrição animal, as características da carcaça e da carne foram avaliadas, e foi feita análise sensorial. A condição sexual e o tempo em confinamento, bem como a interação entre eles, foram avaliados por análise de variância, utilizando o procedimento GLM do software SAS e as médias dos tratamentos foram comparadas pelo teste t de estudante (p < 0,05). Os animais não castrados apresentaram maior ganho de peso e consumo de matéria seca. Eles também tiveram uma melhor eficiência alimentar e área de lombo. Mais tempo no confinamento resultou em maior peso ao abate. Parâmetros como pH, cor, maciez da carne e atributos sensoriais não foram afetados pelos tratamentos. Para o perfil de ácidos graxos, houve efeitos e as interações entre condição sexual e tempo de confinamento. Concluiu-se que a castração não deve ser usada quando o animal é novo e criado em sistema intensivo, mas a castração pode ser interessante para melhorar o perfil de ácidos graxos da carne.

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Section: Introductionmentioning

confidence: 99%

<b>Time on feedlot and sexual effects on animal performance and characteristics of lamb’s meat

Mazon

Carvalho

Pesce

et al. 2017

Acta Sci. Anim. Sci.

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“…The process of castration can be replaced if farmers are able to manage entire ram lambs as a distinct management group (Case study 2). There is evidence from New Zealand that there are production benefits to leaving males entire (Fisher and others 2010). While the liveweights in this study were matched between entire, cryptorchid and wethered (castrated) male lambs, there were carcase and cost:benefit downsides to leaving males entire.…”

Section: Principle Of the 3rsmentioning

confidence: 99%

Considering the 3Rs for castration and tail docking in sheep

Gascoigne¹,

Mouland²,

Lovatt³

2021

In Practice

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Background: Tail docking and castration in lambs are permitted in the UK and are governed by multiple legislations including the Protection of Animals (Anaesthetics) Act (1954), the Veterinary Surgeons Act (1966), the Welfare of Livestock Regulations (1982), the Animal Welfare Act (2006) and the Mutilations (Permitted Procedures)(England) Regulations (2007). However, with political uncertainty and increasing consumer interest in how red meat is produced, the changing global agenda with reference to mutilations will mean that such procedures in the UK are increasingly under the spotlight and may require increasing justification on farm. Notably, the pain caused by these mutilations and their blanket use in regards to sheep production feature on the agenda of several animal welfare charities, including Compassion in World Farming and People for Ethical Treatment of Animals. Aim of the article: With over 10 years since the publication of the Farm Animal Welfare Council's (FAWC) report discussing the implications of these mutilation procedures on the welfare of lambs (FAWC 2008), and the recent publication of the BVA's policy on tail docking and castration (BVA 2020), in this article we will review the debate. Key areas that are considered include the changes in perception of mutilations; the developments in the evidence since the FAWC's publication; the current legislation and how global practices adhere to these rules; the European perspective of mutilations; and how the ‘reduce, refine, replace’ (3Rs) approach can be applied to mutilation discussions when preparing health plans. The arguments surrounding this topic are complex and the ultimate driver for any discussion on farm should be maximising overall animal welfare.

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“…The several management practices viz. castration, shearing and flushing were applied in finishing lambs to be increased production traits and improvement of meat quality traits those influence the commercial values of meat (Fisher et al, 2010). Castration reduces lamb aroma and flavor than non-castrated group.…”

Section: Introductionmentioning

confidence: 99%

Effect of castration on carcass and meat quality attributes in native lambs of Bangladesh

Ma¹,

Numan²,

Haque³

et al. 2022

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The aim of this study was to examine the effect of castration on carcass traits and meat quality of three native region lambs. The selected sixty lambs were divided into two groups like T1 (Uncastrated) and T2 (Castrated) having 30 lambs of each group. Statistical analysis was conducted by SAS with 3×2 factorial experimental model in Completely Randomized Design (CRD). Parameter studied were carcass traits, proximate component (DM, CP, EE, and Ash), physicochemical (ultimate pH, cooked pH, cooking loss, drip loss, water holding capacity- WHC), sensory attributes (color, flavor, tenderness, juiciness, overall acceptability) and instrumental color values (CIE L*, a* and b*). The lamb type and castration had significant effect (p<0.001) on ADG, hot carcass, CP, EE, flavor, juiciness and b* values of native region lambs. The lamb type had significant effect (p<0.001) on drip loss, cooked pH, tenderness and a* values of native region lambs. The ADG and hot carcass were significantly higher (p<0.001) in uncastrated groups than castrated groups. The CP and EE% were significantly higher (p<0.001) in castrated groups than uncastrated groups. Significant higher flavor was found in castrated group whereas juiciness was higher in uncastrated group. It may be concluded that uncastrated lambs showed better in productive performance and carcass traits but castrated lambs showed better in meat quality attributes as evidence from proximate components, physicochemical traits and sensory attributes. Hence, JBL showed better performances among three native region lambs of Bangladesh.

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Implications of removing or altering the testicles of ram lambs on the financial returns from carcasses

Cited by 5 publications

References 35 publications

<b>Time on feedlot and sexual effects on animal performance and characteristics of lamb’s meat

<b>Time on feedlot and sexual effects on animal performance and characteristics of lamb’s meat

Considering the 3Rs for castration and tail docking in sheep

Effect of castration on carcass and meat quality attributes in native lambs of Bangladesh

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