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Causes of pre-slaughter mortality in Danish slaughter pigs with special emphasis on transport

Published online by Cambridge University Press:  11 January 2023

P Barton Gade ,
L Christensen ,
M Baltzer  and
J Valentin Petersen
P Barton Gade*
Affiliation:
Danish Meat Research Institute, Maglegaardsvej 2, DK-4000 Roskilde, Denmark
L Christensen
Affiliation:
Danish Meat Research Institute, Maglegaardsvej 2, DK-4000 Roskilde, Denmark
M Baltzer
Affiliation:
Danish Meat Research Institute, Maglegaardsvej 2, DK-4000 Roskilde, Denmark
J Valentin Petersen
Affiliation:
Danish Bacon and Meat Council, Axelborg, Axeltorv 3 DK-1609 Copenhagen, Denmark
*
* Contact for correspondence and requests for reprints: pbg@danishmeat.dk
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Abstract

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Annual statistics for transport and lairage mortality were used to investigate factors leading to pre-slaughter mortality in Danish pigs. A subset of material from 2002, amounting to 17.8 million pigs, was used for a more detailed study of the effect of producer, haulier, abattoir and transport distance (< 100, 100–200 and > 200 km) on transport mortality. Total mortality was reduced eight-fold during the period that the halothane gene was being removed from the pig population, from 0.12% in the early 1980s to 0.016% in 2002. Overall, transport mortality increased with higher temperature and lower relative humidity/wind speed but a combination of temperature and humidity that fell into the danger zone, as defined by the Livestock Weather Safety Index, almost doubled transport mortality from a level of about 0.016 to 0.031%. Multiple deaths on the same transport were also more frequent during the hotter months of the year. Transport mortality increased with increasing transport distance, especially during warmer weather. Producers, hauliers and abattoirs had widely varying transport mortality. Eighty-nine percent of producers, 11% of hauliers and 86% of farmer transports had no mortality at all. Producers and farmer transports supplying less than 1,000 pigs had a higher transport mortality than those supplying more pigs, whereas it was independent of supply for hauliers. There were many confounding factors in this work, as producers, hauliers and abattoirs are linked and trends over the years can be affected not only by changes in the genetic makeup of the pig population but also by improvements in handling. Nevertheless, the study shows that internal environment within the vehicle and transport pattern, including the time the vehicle is stationary, are important factors for mortality and that particular efforts should be made if weather forecasts predict dangerous combinations of temperature and humidity. It is suggested that efforts to further reduce transport mortality in Danish pigs should concentrate especially on these factors and include a routine follow-up of all multiple deaths to pinpoint specific factors leading to mortality.

Keywords

animal welfarelairagemortalitypigsslaughtertransport
Type
Articles
Information
Animal Welfare , Volume 16 , Issue 4 , November 2007 , pp. 459 - 470
Copyright
© 2007 Universities Federation for Animal Welfare

References

Abbott, TA, Guise, HJ, Hunter, EJ, Penny, RHC, Baynes, PJ and Easby, C 1995 Factors influencing pig deaths during transit: An analysis of drivers’ reports. Animal Welfare 4: 29–40Google Scholar
Allen, WM, Hebert, CN and Smith, LP 1974 Deaths during and after transport transportation of pigs in Great Britain. Veterinary Record 94: 212–214Google ScholarPubMed
Barton Gade, P 1998 Effect of different stocking densities during transport on welfare and meat quality in Danish slaughter pigs. Meat Science 48: 237–247CrossRefGoogle Scholar
Barton Gade, P 2000 Effect of different stocking densities during transport on pig welfare. Proceedings of the 46th International Congress of Meat Science and Technology pp 143-135. 27 August-1 September 2000, Buenos Aires, ArgentinaGoogle Scholar
Barton Gade, P and Baltzer, M 1991 Relationship between halothane status and meat quality in Landrace and Large White pigs Proceedings of the 37th International Congress of Meat Science and Technology pp 33-36. 1-6 September 1991, Kulmbach, GermanyGoogle Scholar
Cedervall, A 1966 Om dödsfall under transport af slagtesvin. Svensk Veternär Tidning 20: 190–193. [Title translation: Transport mortality in slaughter pigs]Google Scholar
Chevillon, P, Frotin, P, Rousseau, P, Le Roux, A, Minivielle, B, Bouyssiere, J and Bataille, G 2002 Comparaison de trois types ventilation lors d'un transport de 10 heures. Techni-Porc 25(6): 1–7. [Title translation: Comparison of three types of ventilation in vehicles used used for 10h transports of pigs]Google Scholar
Christensen, L 1994 Investigation of transport conditions in participating countries in the EC project: PL92063. Proceedings of the 40th International Congress of Meat Science and Technology. 28 August-2 September 1994, The Hague, The NetherlandsGoogle Scholar
Christensen, L and Barton Gade, P 1999 Temperature profile in double-decker transporters and some consequences for pig welfare during transport. In: Russel AJF, Morgan CA, Savory CJ, Appleyard MC and Lawrence TLJ (eds) Occasional publication No. 23 - BSAS pp. 125-128. British Association of Animal Science, Edinburgh, UKGoogle Scholar
Devloo, S, Geerts, H and Symoens, J 1971 Effect of azaperone on mortality and meat quality after transport of pigs for slaughter. Proceedings of the 2nd International Symposium on Condition and Meat Quality in Pigs. 22-24 March 1971, Zeist, Pudoc Wageningen, The NetherlandsGoogle Scholar
Eikelenboom, G, Minkema, D, Van Eldik, P and Sybesma, W 1978 Production characteristics of Dutch Landrace pigs as related to their susceptibility for the halothane-induced malignant hyperthermia syndrome. Livestock Production Science 5: 277–284CrossRefGoogle Scholar
Eikelenboom, G, Minkema, D, Van Eldik, P and Sybesma, W 1980 Results of halothane testing in offspring of Dutch landrace AI boars of different halothane phenotypes. Livestock Production Science 7: 283–289CrossRefGoogle Scholar
Fabiansson, S, Lundström, K and Hansson, I 1979 Mortality among pigs during transport and waiting time before slaughter in Sweden. Swedish Journal of Agricultural Research 9: 25–28Google Scholar
Fàbrega, E, Diestre, A, Carrion, D, Font, J and Manteca, X 2002 Effect of halothane gene on pre-slaughter mortality in two Spanish commercial pig abattoirs. Animal Welfare 11: 449–452CrossRefGoogle Scholar
Fujii, J, Otsu, K, Zorzato, F, de Leon, S, Khanna, VK, Weiler, JE, O'Brien, PJ and MacLennan, DH 1991 Identification of a mutation in porcine ryanodine receptor associated with malignant hyperthermia. Science 253: 448–451CrossRefGoogle ScholarPubMed
Gispert, M, Guardia, D. and Diestre, A 1996a Death rate during transportation and pre-slaughter waiting periods in the pig. Eurocarne 45: 73–79Google Scholar
Gispert, M, Guardia, MD, Olivier, M and Diestre, A 1996b Effect of ante-mortem treatment in transport and lairage mortality in commercial pig abattoirs. Proceedings of the 42nd International Congress of Meat Science and Technology pp 440-441. 1-6 September 1996, Lillehammer, NorwayGoogle Scholar
Grandin, T 1992 Livestock trucking guide. Livestock Conservation Institute: Madison, Wisconsin, USAGoogle Scholar
Guardia, MD, Gispert, M and Diestre, A 1996 La mortalidad en Ganado porcino durante el periodo al sacrificio en mataderos comerciales. Investigación Agraria: Producción y Sanidad Animales 11: 171–179. [Title translation: Mortality during transport and lairage in pigs from commercial abattoirs]Google Scholar
Guise, J, Abbott, TA and Penny, RHC 1994 Driver's observations on trends in pig transit deaths. Pig Journal 32: I 17–122Google Scholar
Kettlewell, PJ, Hoxey, RP, Hampson, CJ, Green, NR, Veale, BM and Mitchell, MA 2001 Mechanical ventilation of livestock transport vehicles. Journal of Agricultural Engineering Research 79: 429–439CrossRefGoogle Scholar
Kristoffersen, J 2004 Transportdödelighet hos slaktsvin Svensk Veterinärtidning 12: 11–15. [Title translation: Transport mortality in slaughter pigs]Google Scholar
Lendfers, HHM 1971 Loss of pigs due to death during transport: a one-year-survey at an abattoir. Proceedings of the 2nd International Symposium on Condition and Meat Quality in Pigs. 22-24 March 1971, Zeist, Pudoc Wageningen, The NetherlandsGoogle Scholar
McPhee, CP, Daniels, LJ, Kramer, HL, MacBeth, GM and Noble, JW 1994 The effects of selection for lean growth and the halothane allele on growth performance and mortality of pigs in a tropical environment. Livestock Production Science 38: I 17–123CrossRefGoogle Scholar
Murray, AC and Johnson, CP 1998 Impact of the halothane gene on muscle quality and pre-slaughter deaths in Western Canadian pigs. Canadian Journal Animal Science 78: 543–548CrossRefGoogle Scholar
Nielsen, NJ 1981 The effect of environmental factors on meat quality and deaths during transportation and lairage before slaughter. Proceedings of the Symposium ‘Porcine stress and meat quality — causes and possible solutions to the problems’ pp 287-297. 17-19 November 1980, Jeløy, NorwayGoogle Scholar
Riches, HL, Guise, HJ, Penny, RHC, Jones, TA and Cuthbertson, A 1996 A national survey of transport conditions for pigs. The Pig Journal 38: 8–18Google Scholar
Warriss, PD 1995 Pig handling — Guidelines for the handling of pigs ante mortem. Meat Focus International 4: 491 -494Google Scholar
Warriss, PD 1998 The welfare of slaughter pigs during transport. Animal Welfare 7: 365–381Google Scholar
Warriss, PD and Brown, SN 1994 A survey of mortality in slaughter pigs during transport and lairage. Veterinary Record 134: 513–515Google ScholarPubMed