ZEYI.htm

NR ZEYI

AU Ali,A.S.A.; Lawson,M.A.; Tauson,A.H.; Jensen,J.F.; Chwalibog,A.

TI Influence of electrical stunning voltages on bleed out and carcass quality in slaughtered broiler chickens

QU Archiv für Geflügelkunde 2007; 71: 35-40

PT journal article

AB Two experiments involving 420 birds were conducted to determine the influence of electrical stunning on meat quality and blood retained by chicken carcasses. The birds used in this study were 40-d-old (Ross 208) broiler chickens, from the same flock, hatched and raised commercially under similar environmental and nutritional conditions and weighing about 2 kg. In the first experiment, eleven treatment groups were set up with twenty mixed-sex birds each. In the second experiment, two hundred birds were allocated to ten groups with twenty male birds each. Birds in both experiments were individually stunned at 0, 23, 33, 38, 43, 48, 53, 58, 63, 103 and 193 Volt (only exp 1). The total blood volumes of the individual broilers were calculated. It was concluded that the applied electrical voltage for stunning significantly affects the rate of bleed out in broilers. Carcass defects were increased with the increasing of the electrical stunning voltages. With increased attention to the humane treatment of food animals during slaughter, the 50 - 63 V AC stun could prove to be more humane if it is combined with an effective method of slaughter that achieved a rapid bleeding. Stunning at 53 V AC for 10 s maximized bleed out to over 50%. Low electrical stunning voltages (0 to 23 V AC) resulted in poor bleeding (40%) and high incidence of carcasses defects that classified as B. High stunning voltages (103 to 193 V AC) sufficient to satisfy birds welfare issues but resulted in other side effects such as physical damage, breast blood spots, red wingtips and broken bones. High stun carcasses were classed as B. Moderate stunning (53 to 63 V AC) seems to be more effective in bleed-out (50%) and resulted in better carcass quality which obtained grade A. Finally, this study confirms that a beating heart is not necessary in order to ensure effective bleed-out. In addition, it is difficult to think of any scientific, religious, economic and humanitarian grounds for removing the last possible drop of blood.

SP englisch

PO Deutschland

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