Pigs of three genetic lineages A, B and C commercialized in Brazil, with weight from 100 to 120 kg, were submitted to the manual electric stunning (Karl Schermer 220-230/250 Volts, 45-60 Hz and 1,4 -1,5A) and to the collective gaseous system (COMBI-BUTINA 90% CO2) at the same slaughterhouse. The gaseous system provided to the hybrids an increase in the values (b*) (p<0,001), when compared to the electric system, as well as differences in the average values of light scattering (Hennessy-gp4) to the 45 min. pm and 24ª h pm (p<0,05). When submitted to the gaseous system, differences among the hybrid in the average values of superficial brightness (L) 24ª h pm (p<0,0001) pH 24ª h pm (SM) (p<0,0001), values (b*) 24ª h pm (p<0,05), light scattering 45 min e 24ª h (LD) (p<0,001) were observed. By using the manual electric system, significant differences were verified in the average values of light scattering (LD) 45 min. e 24ª h pm (p<0,001), as well as in the average values of pH 24ª h pm (SM) e (SC) (p<0,05). However, the differences obtained between the stunning systems and hybrids were not enough to provide significant differences in the values of water holding capacity, drip loss and expressible moisture.
stunning system; animal welfare; meat quality
