ZBNI.htm

NR ZBNI

AU Ali,A.S.A.; Jensen,J.F.; Jensen,J.A.

TI Effect of different stunning voltages on blood loss, carcass quality and breast muscle pH

QU Archiv für Geflügelkunde 1996; 60: 126-31

PT journal article

AB Five experiments were conducted to examine the effect of different stunning voltages on blood loss, carcass quality and breast muscle pH. Broilers were stunned in a water-bath stunner for 10 seconds at selected electrical voltages. In the first experiment, the total blood volume (TBV) of the individual broilers was calculated using the formula of Kotula and Helbacka (1966b). In the second, third and fourth experiments, to determine the quality problem of che carcasses, the study adopted a visual grading system in which the carcasses were individually examined by a selected trained panel. Ln the fifth experiment, the pH values were recorded with a digital pH meter (Knick-portamess 751, calmatic, W. Germany) equipped with an Ingold glass electrode (model 453 - S7). The percentage of blood loss, was significantly affected by the different stunning treatment, which averaged 42.3, 38.5, 53,7, 53, and 51% for 0, 23, 53, 103, and 193 TT AC, respectively. this study indicated that stunning voltages higher than 100 Tr could be used without any detrimental effect on blood loss as long as the standard bleeding time of 135 seconds is maintained. Adverse effects were observed on the carcass quality and appearance from birds stunned at 103 and 193 V AC, Stunning at 50 V AC resulted in a significantly higher pH up to 4 hours postmortem. After 24 hours post-mortem, no differences were observed in pH values from birds stunned at 50 or/and 200 V AC. It was concluded that stunning at 50 V AC for 10 seconds could be used without any detectable adverse effects on blood loss, carcass quality and breast muscle pH.

AD ROYAL VET & AGR UNIV,DEPT ANIM SCI & ANIM HLTH,DK-1870 FREDERIKSBERG C,DENMARK

SP englisch

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