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Preslaughter stress and beef quality in relation to slaughter transport of cattle
SLU Swedish University of Agricultural Sciences, Sweden.
SLU Swedish University of Agricultural Sciences, Sweden.
SLU Swedish University of Agricultural Sciences, Sweden.
SLU Swedish University of Agricultural Sciences, Sweden.
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2022 (English)In: Livestock Science, ISSN 1871-1413, E-ISSN 1878-0490, Vol. 264, article id 105073Article in journal (Refereed) Published
Abstract [en]

Preslaughter handling inevitably exposes cattle to stress, which affects beef quality and yields. Short transports to the slaughterhouse or a short walk across the yard to a mobile abattoir parked on the farm may reduce stress, with potential beneficial effects on meat quality. To compare different road transport distances to a stationary (fixed) slaughterhouse, and the stationary plant with a mobile abattoir, we studied commercial slaughter of 298 cattle in each facility over a period of 13 months. For the stationary slaughterhouse, the estimated transport distance from farm to plant was 7–250 km (mean 99 km) and 96 animals spent one night in lairage there. All animals at both slaughterhouses were stunned with a captive bolt gun. Blood levels of cortisol, glucose and lactate at exsanguination and meat quality indicators were recorded. According to two-sample t-tests, thawing loss was 1 percent unit lower (p<0.0001), Warner-Bratzler shear force was 6.9 N lower (p<0.0001) and compressive load was 3.9 MPa lower (p<0.0001), but mean lactate level was 1.02 mmol/l higher (p<0.0001) and ultimate pH was 0.05 units higher (p=0.0001) in the mobile facility compared with the stationary. Effects of slaughter facility and estimated road transport distance to the stationary plant on blood lactate, ultimate meat pH, shear force and compressive load were analysed by generalized linear mixed models, with delivering farm as random effect. According to the models, predicted shear force was 23% higher at the 95th percentile of the transport distance compared with the 5th percentile (p=0.012), and there was some evidence of a similar difference in compressive load for heifers, albeit only marginally significant (39% higher at the 95th percentile; p=0.056). Predicted blood lactate was 19% higher in the mobile abattoir than the stationary slaughterhouse (p=0.046). Ultimate meat pH was higher in the mobile unit for cows and steers (p≤0.0020), and for carcasses weighing 311–380 kg (p≤0.0020). Compressive load was 27% lower in the mobile abattoir, compared to the stationary (p<0.0001), but shear force did not differ significantly between the two facilities. This study shows a negative effect of long transport distances on beef tenderness. It also provides evidence of differences in beef quality between a mobile abattoir and a stationary slaughterhouse, although these differences may be attributable to specific routines for carcass handling and ageing at the studied facilities, and not the transport and slaughter strategy itself. 

Place, publisher, year, edition, pages
Elsevier B.V. , 2022. Vol. 264, article id 105073
Keywords [en]
Compressive load, On-farm slaughter, Shear force, Stress, Tenderness
National Category
Agricultural Science, Forestry and Fisheries
Identifiers
URN: urn:nbn:se:ri:diva-60257DOI: 10.1016/j.livsci.2022.105073Scopus ID: 2-s2.0-85138510252OAI: oai:DiVA.org:ri-60257DiVA, id: diva2:1702191
Note

Export Date: 10 October 2022; Article; Correspondence Address: Segerkvist, K.A.; Swedish University of Agricultural Sciences, P.O. Box 234, Sweden; email: katarina.segerkvist@slu.se; Funding details: Marie-Claire Cronstedts Stiftelse; Funding details: Svenska Djurskyddsföreningen, SDF; Funding text 1: This work was funded through donations from Marie-Claire Cronstedt Foundation (decision 1 December, 2014) and the Swedish Association for the Protection of Animals (decision 8 December, 2015). Basen AB and Caroline Ankarcrona contributed funds to the meat analyses. The meat sampled at the mobile abattoir was paid for by the slaughter company. The authors thank the two involved slaughter companies for the possibility to carry out the project, especially the staff who assisted in various ways in connection with data collection. Research technicians Anne Larsen and Karin Wallin collected data and samples at slaughter and cutting, and provided valuable input on project implementation. Marco Berta, Marlene Svensson and Emma Bragd at the RISE Research Institutes of Sweden performed laboratory analyses of meat samples.

Available from: 2022-10-10 Created: 2022-10-10 Last updated: 2024-03-25Bibliographically approved

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