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Welfare Implications of the Gas Stunning of Pigs 1. Determination of Aversion to the Initial Inhalation of Carbon Dioxide or Argon

Published online by Cambridge University Press:  11 January 2023

ABM Raj  and
N G Gregory
ABM Raj*
Affiliation:
Division of Food Animal Science, Department of Clinical Veterinary Science, University of Bristol, Langford, Bristol BS18 7DY
N G Gregory
Affiliation:
Division of Food Animal Science, Department of Clinical Veterinary Science, University of Bristol, Langford, Bristol BS18 7DY Faculty of Veterinary Science, Massey University, Private Bag 11222, Palmerston North, New Zealand
*
† Contact for correspondence and requests for reprints
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Abstract

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The aversive effects of 90 per cent argon in air, 30 per cent carbon dioxide in air or 90 per cent carbon dioxide in air were investigated in slaughter weight pigs. Aversion was assessed from their reluctance to enter the three gaseous atmospheres to obtain a reward (apples). The pigs did not show any aversion to the inhalation of 90 per cent argon in air. The majority of the pigs did not show aversion to the presence of 30 per cent carbon dioxide in air. By contrast, the inhalation of 90 per cent carbon dioxide was aversive to the majority of the pigs. Fasting them for up to 24h prior to testing did not overcome the pigs ‘ reluctance to enter an atmosphere containing 90 per cent carbon dioxide.

Keywords

animal welfareargonaversioncarbon dioxideinhalationpigsstunning
Type
Research Article
Information
Animal Welfare , Volume 4 , Issue 4 , November 1995 , pp. 273 - 280
Copyright
© 1995 Universities Federation for Animal Welfare

References

Blomquist, S M 1957 The carbon dioxide method of stunning pigs for slaughter. Food Manufacture 32: 230–233Google Scholar
Cantieni, J 1976 Ein Beitrag zur CO2-Betaubung von Schlachtschweinen. Schweiz Arch Tierheiłk 119: 355–375Google Scholar
Dodman, N H 1977 Observations on the use of the Wernberg dip-lift carbon dioxide apparatus for pre-slaughter anaesthesia of pigs. British Veterinary Journal 133: 71–80CrossRefGoogle ScholarPubMed
Gregory, N G, Mohan Raj, A B, Audsley, A R S and Daly, C C 1990 Effect of CO2 on man. Fleischwirtschaft 70: 1173–1174Google Scholar
Larsen, A M 1983 Choosing between CO2 and electrical stunning of pigs. A preliminary examination of stress and ethics. In: Eikelenboom, G (ed) Stunning of Animals for Slaughter pp 64–72. Martinus Nijhoff: The Hague, The NetherlandsGoogle Scholar
Mohan Raj, A B, Wotton, S B and Gregory, N G 1992 Changes in the somatosensory evoked potentials and spontaneous electroencephalogram of hens during stunning with a carbon dioxide and argon mixture. British Veterinary Journal 148: 147–156Google ScholarPubMed
Raj, M and Gregory, N G 1993 Time to loss of somatosensory evoked potentials and the onset of changes in the spontaneous electroencephalogram of turkeys during gas stunning. Veterinary Record 133: 318–320CrossRefGoogle ScholarPubMed