The Impact of Feed Deprivation and Stress at Slaughter on the Metabolism and Carcass Yield of Lambs

S.M. Stewart; D.W. Pethick; G.E. Gardner; P. McGilchrist

The Impact of Feed Deprivation and Stress at Slaughter on the Metabolism and Carcass Yield of Lambs

In: 63rd International Congress of Meat Science and Technology

Authors:

S.M. Stewart

S.M. Stewart School of Veterinary and Life Sciences, Murdoch University, Perth, WA, 6150, Australia; s.stewart@murdoch.edu.au

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D.W. Pethick

D.W. Pethick School of Veterinary and Life Sciences, Murdoch University, Perth, WA, 6150, Australia; s.stewart@murdoch.edu.au

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G.E. Gardner

G.E. Gardner School of Veterinary and Life Sciences, Murdoch University, Perth, WA, 6150, Australia; s.stewart@murdoch.edu.au

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P. McGilchrist

P. McGilchrist School of Veterinary and Life Sciences, Murdoch University, Perth, WA, 6150, Australia; s.stewart@murdoch.edu.au

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Type:: Chapter

Pages:: 433–434

DOI:: https://doi.org/10.3920/9789086868605_191

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The purpose of this study was to examine what proportion of circulating metabolites at slaughter due to stress and feed deprivation and if this response differs between Merino and Terminal genotypes. Jugular blood samples were collected from 88 Merino and Terminal sired lambs at rest and at slaughter following 24, 36 and 48 hours of feed deprivation. Merino sired lambs had a higher NEFA response compared to Terminal sired lambs at slaughter after 24, 36 and 48 hours of feed deprivation, with NEFA levels up to 20% higher than previously reported at rest. In addition, increasing feed deprivation from 36 hours was associated with a 3% reduction in HCWT. This study showed that there are significant differences in NEFA response to feed deprivation between Merino and Terminal genotypes under commercial slaughter conditions suggesting that adipose tissue is an important substrate mobilised during acute stress.

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63rd International Congress of Meat Science and Technology

Nurturing locally, growing globally

E-Book ISBN:: 9789086868605

Publisher:: Wageningen Academic

Print Publication Date:: 15 Nov 2017

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- Life Sciences

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The Impact of Feed Deprivation and Stress at Slaughter on the Metabolism and Carcass Yield of Lambs

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63rd International Congress of Meat Science and Technology

Nurturing locally, growing globally

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