The development of meat tenderness is likely to be compartmentalised by ultimate pH. Road transportation affects blood hormone levels and lymphocyte glucocorticoid and β-adrenergic receptor concentrations in calves. Odore R, D’Angelo A, Badino P, Bellino C, Pagliasso S, Re G. Have we underestimated the impact of pre-slaughter stress on meat quality in ruminants? Meat Sci. Livestock transport from the perspective of the pre-slaughter logistic chain: a review. Miranda-de la Lama GC, Villarroel M, María GA. Appropriate changes in handling routines in operating conditions should be made to minimize stress to animals during the slaughter process to improve animal welfare and meat quality.īovine Cortisol Meat Quality Slaughter Stress. Add a punch of tropical colors to your summer fun with a glorious flower arrangement. The bruises probably caused by stress-inducing situations triggered DFD meat. Send a ray of sunshine with a floral bouquet of summer flowers. According to principal component analysis, grades 1 and 2 bruises in region 3 and grade 1 bruises in region 5 were highly associated with cortisol, drip loss, and color parameters b* and h* and were negatively associated with L*, a*, and C*. These findings were indicative of dark, firm, and dry (DFD) meat. In both pH groups, meat samples showed L* values >37.0 (81.6%) and a shear force >54.3 N meat pH≥5.8 group showed a drip loss of 2.5%. Of the carcasses evaluated, 90.4% had a pH ≥5.8 with an average of pH 6.3. Of the 448 carcasses studied, 69.6% showed hyperglycemia (6.91 mmol/L) 44.3% and 22.7% showed high (74.7 ng/mL) and extremely high (108.8 ng/mL) cortisol levels, respectively, indicative of inadequate handling of animals during preslaughter and slaughter. Of the 775 bruises found, 69.2% of the bruises were grade 1 in region 3. Of the 448 carcasses evaluated, 81% of the carcasses showed at least one bruise one bruise was detected in 36.6% and two bruises in 27.0% of animals. Blood variable indicators of stress (packed cell volume, neutrophil to lymphocyte ratio, glucose, cortisol concentration) and meat quality parameters (pH, color, shear force, drip loss) were evaluated.
Carcass assessment of presence of bruises and bruise characteristics was carried out on each half-carcass. This study aimed to determine the effects of stress during slaughter of beef cattle on physiological parameters, carcass, and meat quality at a Federal Inspection Type slaughterhouse located in the southeast of Mexico.Ī total of 448 carcasses of male Zebu×European steers with an average age of 36 months were included.
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