The severity of respiratory distress occurring before loss of posture during exposure to 20, 30, 40, 50, 60, 70, 80 or 90% CO2 in air; 2 or 5% residual oxygen in argon; 30% CO2 in argon with either 2 or 5% residual oxygen; or 40% CO2 in argon with either 2 or 5% residual oxygen, was subjectively determined in 6 groups of 6 pigs from their behaviour. The results indicated that exposure to 2% oxygen in argon (anoxia) induced little respiratory distress, 30% CO2 in argon with 2% residual oxygen induced a moderate distress and exposure to all the concentrations of CO2 in air induced severe respiratory distress in the pigs.
|Publication Title||Animal Welfare|
|Author Address||Division of Food Animal Science, Department of Clinical Veterinary Science, University of Bristol, Langford Bristol BS18 7DY, UK.|
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