The effect of nutritional supplements on growth rate, stress responsiveness, muscle glycogen and meat tenderness in pastoral lambs

Lowe, Tim E.; Peachey, B.; Devine, C.E.

doi:10.1016/s0309-1740(02)00027-x

Cited by 37 publications

(24 citation statements)

References 17 publications

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“…The inverse relationships observed between norepinephrine and dopamine with CL2 in steers supplemented with SF and CN diets are difficult to explain. It has been suggested that a rise in endogenous secretion of catecholamines results in a concomitant increase in intramuscular glycogen utilisation (Lowe et al, 2002;Foury et al, 2005). A direct action of catecholamines in these processes could therefore completely exhaust the fat reserves of the muscle (Schaefer et al, 2001;Lowe et al, 2004) and consequently reduce meat CL.…”

Section: Discussionmentioning

confidence: 99%

“…The magnitude of any negative effect is a function of the type, duration and intensity of the individual stressors, production system and susceptibility of each individual animal to stress (Ferguson and Warner, 2008;Terlouw et al, 2008). The susceptibility of the individual animal to stress is, in particular, influenced by genetics (Ndlovu et al, 2008;Muchenje et al, 2009;O' Neill et al, 2009) and nutrition (Schaefer et al, 2001;Lowe et al, 2002). If losses in beef yield and quality due to ante-mortem stress are to be minimised, it is necessary to understand the effects of these contributory factors and their interaction.…”

Section: Introductionmentioning

confidence: 99%

“…Although rangeland energy and mineral supplies in the dry seasons are sufficient to meet the production requirements of Nguni cattle (Mapiye et al, 2010a), they lose -E-mail: cmapiye@yahoo.co.uk body condition and weight in the same season as a consequence of limited protein supply (Mapiye et al, 2010b). Cattle in poor condition are more susceptible to pre-slaughter stressors than well-fed animals (Lowe et al, 2002;Gregory, 2008). Use of stress-tolerant cattle genotypes in tandem with dietary nutrient supplementation might therefore reduce ante-mortem stress-related losses in meat yield and quality.…”

Section: Introductionmentioning

confidence: 99%

“…Determination of urinary catecholamines post mortem has been shown to be a valid method for evaluating ante-mortem stress in animals (Lowe et al, 2002;Ndlovu et al, 2008). Muchenje et al (2009) obtained low concentrations of catecholamines in urine collected post mortem from Nguni steers compared with the Bonsmara and the Angus breeds.…”

Section: Introductionmentioning

confidence: 99%

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Stress reactivity and its relationship to beef quality in Nguni steers supplemented with Acacia karroo leaves

Mapiye

Chimonyo

Marufu

et al. 2011

Animal

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The objective of this study was to determine the levels of catecholamines and their relationship to beef quality in Nguni steers fed on Acacia karroo leaves. A total of 30 19-month-old steers were randomly assigned to A. karroo leaves (AK), sunflower cake (SF) and the control with no supplement (CN) diets. The AK and SF diets provided the steers with an additional 150 g of protein per day for 60 days. Catecholamine levels were determined from urine samples collected from each steer before and after slaughter. The Musculus longissimus thoracis et lumborum was sampled for selected meat quality measurements. Nguni steers on the CN diet had higher ( P , 0.05) concentrations of post-mortem urinary norepinephrine and dopamine compared with those that received the AK and SF diets. Norepinephrine was negatively linearly related ( P , 0.05) to the Warner-Bratzler shear force value of meat aged for 21 days and cooking loss of meat aged for 2 days (CL2) in steers that were given the SF diet. Meat pH and drip loss values were inversely related ( P , 0.05) to epinephrine concentration in steers that received the AK diet. Dopamine concentration was negatively linearly related ( P , 0.05) to water holding capacity and CL2 for steers on the CN diet. For steers on the CN diet, lightness ( L*) values increased ( P , 0.05) with increase in dopamine concentration. It was concluded that stress responsiveness and its relationship to certain beef quality attributes could be positively manipulated by supplementation with A. karroo leaves.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stress reactivity and its relationship to beef quality in Nguni steers supplemented with Acacia karroo leaves

Mapiye

Chimonyo

Marufu

et al. 2011

Animal

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“…Se ha sugerido que un aumento en la secreción endógena de catecolaminas produce un aumento en la utilización de glucógeno intramuscular (Foury et al, 2005;Lowe et al, 2002) y además en este proceso podrían agotarse completamente las reservas de grasa del músculo (Lowe et al, 2004). Por otro lado, las catecolaminas funcionan para regular ciertas funciones corporales.…”

Section: -Catecolaminasunclassified

La importancia del temperamento en la producción de ganado de carne bovina

León–Llanos

Flórez–Díaz

2016

Orinoquia

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La importancia del temperamento en la producción de ResumenEn las explotaciones ganaderas, los bovinos son expuestos a diferentes factores estresantes desde el crecimiento hasta el sacrificio, afectando el bienestar y temperamento de los animales. El término "temperamento" se define como la reacción producida en un animal ante la presencia del hombre y se encuentra afectado por diferentes factores como la raza, el gé-nero, la edad, el manejo y la genética. Durante la evaluación del temperamento los bovinos excitables (nerviosos) tienden a presentar resultados altos en las evaluaciones de corral (EC), brete (EB) y velocidad de salida del brete (VSB), los cuales están relacionados con concentraciones elevadas de glucocorticoides y catecolaminas. Asimismo, los animales de temperamento nervioso presentan bajas ganancias diarias de peso (crecimiento lento) y bajos resultados de calidad de la canal y de la carne en comparación con animales de temperamento calmado. Por lo que el propósito de este documento fue revisar la relación entre el temperamento y la producción de carne bovina.Palabras clave: Calidad de la canal, Estrés, Ganancia de Peso, Sacrificio, Terneza, Velocidad de Salida. AbstractIn livestock farms, cattle are exposed to different stressors from growth to slaughter, affecting the welfare and temperament of animals. The term "temperament" is defined as the reaction produced by an animal in the presence of man and is affected by various factors such as breed, gender, age, management and genetics. During the evaluation of cattle temperament, animals with an excitable temperament (nervous) tend to have high scores on assessments of pen, chute and chute exit velocity, which are associated with high concentrations of glucocorticoids and catecholamines. Also, animals with nervous temperament have low daily gains (slow growth) and lower results of carcass and meat quality compared to animals with calm temperament. The purpose of this paper is to review the relationship between temperament and beef cattle production.

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Converting Muscle to Meat: The Physiology of Rigor

Braden

2013

The Science of Meat Quality

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The effect of nutritional supplements on growth rate, stress responsiveness, muscle glycogen and meat tenderness in pastoral lambs

Cited by 37 publications

References 17 publications

Stress reactivity and its relationship to beef quality in Nguni steers supplemented with Acacia karroo leaves

Stress reactivity and its relationship to beef quality in Nguni steers supplemented with Acacia karroo leaves

La importancia del temperamento en la producción de ganado de carne bovina

Converting Muscle to Meat: The Physiology of Rigor

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