Electroencephalographic assessment of concussive non-penetrative captive bolt stunning of turkeys
| Autor: | T A Gowers, Natalie Chancellor, T. J. Gibson, C B Rebelo |
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| Rok vydání: | 2017 |
| Předmět: |
Veterinary medicine
Turkeys 040301 veterinary sciences Unconsciousness Electroencephalography Body weight Animal Welfare 0403 veterinary science Animal welfare Reflex Medicine Animals Animal Husbandry medicine.diagnostic_test business.industry Euthanasia Stunning Body Weight 0402 animal and dairy science Conducted Energy Weapon Injuries 04 agricultural and veterinary sciences General Medicine 040201 dairy & animal science Anesthesia Animal Science and Zoology Female business Abattoirs Food Science |
| Zdroj: | BRITISH POULTRY SCIENCE |
| ISSN: | 1466-1799 |
| Popis: | 1. The aim of this study was to evaluate the electroencephalographic (EEG) and behavioural responses of turkeys stunned with three different concussive non-penetrative captive-bolt guns prior to slaughter.\ud \ud 2. A total of 31 slaughter weight ex-breeding female turkeys (29 weeks of age; mean body weight 13.32 ± SD 0.65 kg) were stunned with the Cash Poultry Killer (CPK) (n = 10), Turkey Euthanasia Device (TED) (n = 10) and Zephyr EXL (n = 11).\ud \ud 3. Mean peak kinetic energy was highest for the CPK compared to the TED and Zephyr EXL (75.9 ± 4.5, 28.4 ± 0.4 and 24.4 ± 0.7 J, respectively).\ud \ud 4. A total of 29 (94%) of the turkeys were rendered unconscious following captive bolt stunning, with total power of the EEG (Ptot) significantly reduced from baseline values (reductions of 67% CPK, 84% TED and 76% Zephyr EXL, p < 0.01) and waveforms becoming isoelectric after periods of transitional EEG. However, two birds shot with the CPK and Zephyr EXL had periods of behavioural/reflexes (rhythmic respiration, nictitating membrane reflex, neck tension) and EEG activity (43–47 and 36–60 + s after the shot, respectively) indicating incomplete concussion and return of consciousness. In one bird, the shot was incorrectly positioned (Zephyr EXL), while the other appeared to be related to a defective cartridge (CPK).\ud \ud 5. In conclusion, all three captive bolt gun models were effective in producing unconsciousness in turkeys, provided they were positioned correctly and power loads performed according to their specifications.\ud \ud KEYWORDS: Animal welfare, behaviour/brainstem reflexes, captive bolt, electroencephalogram (EEG), non-penetrative, stunning, turkey |
| Databáze: | OpenAIRE |
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