Factors influencing bruises and mortality of broilers during catching, transport, and lairage
The risk factors associated with mortality and bruises occurring between catching and slaughter were identified and quantified using a multilevel analysis. Some the data collected indicated that the mean percentage of dead on arrival was 0.46. After correcting the percentage of bruises for economic value, the percentage of bruises was 2.20. Bruises were associated with season, moment of transport, and ambient temperature. Factors associated with the percentage of dead on arrival were ambient temperature, moment of transport, catching company, breed, flock size, mean body weight, lairage time, and the interaction term transport time x ambient temperature. Stocking density, transport time, and lairage time were the most important factors associated with deads on arrival. These factors can be improved relatively easily and therefore increase animal welfare and profitability.
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