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NR ZBNC

AU Wilkins,L.J.; Wotton,S.B.; Parkman,I.D.; Kettlewell,P.J.; Griffiths,P.

TI Constant current stunning effects on bird welfare and carcass quality

QU Journal of Applied Poultry Research 1999; 8: 465-71

PT journal article

AB The effectiveness of electrical stunning of broiler chickens, applied using a constant current control device, was assessed in terms of both the return of breathing and neck resistance and subsequent carcass quality. Effectiveness of stunning was assessed by stunning individual birds with 105 mA/bird using 50, 500, or 1500 Hz sinusoidal AC for 1 or 4 sec. Carcass quality was assessed using the same device in two semi- commercial trials where stunning was applied using 50, 500, or 1500 Hz sinusoidal AC at four preset current levels, 80, 105, 120, and 150 mA/bird, in a constant current multibird waterbath. The duration of lack of neck resistance produced by the stun, where ventricular fibrillation was not induced, was similar regardless of the waveform-frequency combination employed. Stunning current level had no effect on the incidence of hemorrhagic conditions in the processed carcasses. High frequency waveforms were associated with a significant reduction in the incidence of breast muscle hemorrhaging, which indicates that their use could have a considerable commercial advantage.

AD Wilkins,L.J.; Univ Bristol, Sch Vet Sci, Bristol BS18 7DY, Avon, England

SP englisch

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