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Plasma beta-endorphin increase following electrical stunning in sheep
M H Anil1, D P Fordham, R G Rodway
1AFRC Institute of Food Research, Langford, Bristol.
The British Veterinary Journal
|September 1, 1990
Summary
Electrical stunning significantly increases beta-endorphin in sheep, indicating potential distress during recovery. Prompt exsanguination after stunning is crucial for animal welfare in slaughter processes.
Area of Science:
- Animal physiology
- Neuroendocrinology
- Livestock welfare
Background:
- Electrical stunning is a common method for slaughtering sheep.
- Understanding the physiological stress response is vital for improving animal welfare.
- Beta-endorphin levels are indicators of stress and pain in animals.
Purpose of the Study:
- To measure plasma beta-endorphin concentrations in sheep.
- To assess the impact of electrical stunning on beta-endorphin levels.
- To evaluate potential distress during the recovery phase from stunning.
Main Methods:
- Assay of plasma beta-endorphin concentrations.
- Measurement in 10 sheep during conscious state and post-stunning.
- Monitoring levels during recovery from electrical stunning.
Main Results:
- A twofold increase in plasma beta-endorphin was observed immediately after electrical stunning.
- Further elevation of beta-endorphin occurred during the recovery period.
- These hormonal changes suggest a significant physiological stress response.
Conclusions:
- Recovery from electrical stunning may induce considerable distress in sheep.
- Prompt exsanguination following stunning is recommended to mitigate suffering.
- Findings highlight the need for optimized stunning and slaughter protocols for sheep welfare.