Travel sickness and meat quality in pigs

An experiment was conducted to investigate the incidence of travel sickness in pigs, specific hormone concentrations at exsanguination and subsequent meat quality. Fifty, 80kg slaughter pigs were transported on a lorry for 4. 5h. During the journey, behavioural observations of the individually marked pigs were made by scanning every 8min to establish whether the pigs exhibi ted certain symptoms of travel sickness (foaming at the mouth and chomping) and incidences of retching and vomiting were noted as they occurred Upon a rrival at the slaughterhouse, pigs were unloaded, slaughtered immediately a nd a blood sample was taken at exsanguination for analysis of plasma cortis ol, beta-endorphin and lysine vasopressin concentrations. On the day follow ing slaughter the chilled carcase of each pig was assessed for meat quality (using pH, Fibre Optic Probe, and Tecpro Pork Quality Meter measurements) in the longissimus dorsi, semimembranosus and adductor muscles to determine the incidence of PSE (pale, soft, exudative) or DFD (dark, firm, dry) meat quality. Twenty-six per cent of the pigs (a total of 13 individuals) vomit ed or retched during the journey. There was no relationship between the inc idence of travel sickness and either the concentrations of the hormones ana lysed at exsanguination or subsequent meat quality. Correlations revealed n o significant relationship between concentrations of the hormones and meat quality measurements.