Pre-slaughter stress can result in variations in the glycogen storage and metabolic changes of muscle, responsible for quality poultry meat. Aim of this study was to investigate, as pre-slaughter stress markers and quality meat, physicochemical (pH), biochemical (muscle glycogen content), and chemical (super oxides free radicals) parameters. The carcass quality, as incidence of individual carcass defects, was also evaluated. Twenty broilers were processed with two different electrical stunning: high (250 Hz; 640 mA; 60V) (Lot C or control) and low (150 Hz; 360 mA; 60 V) (Lot A) frequency and intensity, using sinusoidal alternating current. As preliminary results, the use of low frequency and intensity induced faster pH decline post mortem and adequate acidification of pH at 3 hours (6.49 Lot C; 6.37 Lot A), better muscle glycogen reserve (0.770 μL/50 mL Lot C; 1.497 μL/50mL Lot A), and lightly more rapid muscle oxidation (IDF: 0.109 Lot C; 0.122 Lot A), (FOX: 0.131 MeqO2/kg Lot C; 0.140 MeqO2/kg Lot A). The incidence of individual carcass defects sufficient to cause downgrading or rejection, both in Lot C and Lot A, was generally low. In a multidisciplinary approach, to assess animal welfare and quality poultry meat, additional and feasible parameters should be implemented. Monitoring of pH, muscle glycogen reserve and superoxide free radical production measurements might be markers easier to use, routinely, in practice at abattoir. Further studies are needed to evaluate the usefulness of these parameters.
展开▼
机译:屠宰前的压力会导致糖原储存的变化和肌肉的代谢变化,从而影响优质的禽肉。这项研究的目的是研究作为屠宰前压力指标和优质肉,理化(pH),生化(肌肉糖原含量)和化学(超氧化物自由基)参数。还评估了quality体质量,作为各个car体缺陷的发生率。使用正弦交流电对二十只肉鸡进行了两种不同的电击晕处理:高(250 Hz; 640 mA; 60V)(Lot C或对照)和低(150 Hz; 360 mA; 60 V)(Lot A)频率和强度。作为初步结果,使用低频和高强度可导致死后pH下降更快,并在3小时内充分酸化pH(6.49 Lot C; 6.37 Lot A),更好的肌肉糖原储备(0.770μL/ 50 mL Lot C; 1.497μL) / 50mL批次A)和稍快的肌肉氧化(IDF:0.109批次C; 0.122批次A),(FOX:0.131 MeqO2 / kg批次C; 0.140 MeqO2 / kg批次A)。在C批次和A批次中,足以引起降级或拒收的单个car体缺陷的发生率通常较低。在多学科的方法中,为了评估动物的福利和优质的家禽肉,应该实施其他可行的参数。在屠宰场实践中,常规情况下,监测pH值,肌肉糖原储备和超氧化物自由基产生的测量值可能是更易于使用的标记。需要进一步研究以评估这些参数的有效性。
展开▼