Animal welfare and meat quality in pigs as affected by trailer type, travel distance and genotype
|Authors:||Weschenfelder, Angela Vanelli|
|Advisor:||Saucier, Linda; Faucitano, Luigi|
|Abstract:||This thesis dealt with the effects of vehicle design (pot-belly [PB] vs. flat-deck [FD]) and transport distances (45 min vs. 7 h) on animal welfare and pork quality of three Pietrain crossbreds (Pietrain 50% HALNn (50Nn), Pietrain 50% HALNN (50NN), and Pietrain 25% HALNN (25NN). Behavioural and physiological responses and pork quality parameters were measured. The relationship between body temperature as measured by infrared thermography (IRT) in the restrainer before stunning and other animal welfare and pork quality parameters was also studied. Results obtained from both short and long distance transportation indicated that genetics has a larger impact on animal welfare parameters and pork quality traits than trailer type. However, under short distance transportation the PB trailer model augmented the negative genotype-related defects as measured by physiological responses to stress and pork quality parameters. Pigs with 50% Pietrain crossbreeding, regardless of the HAL genotype, produced leaner carcasses but appeared to be more responsive to transport stress. Pork quality was not detrimentally affected by the proportion of Pietrain inheritance in the crossbred but by the presence of the HAL gene. The study of IRT body temperature suggests that ocular IRT may detect changes in body temperature associated with the physiological condition of pigs and may be considered a potential tool to predict pork quality variation under commercial conditions.|
|Document Type:||Thèse de doctorat|
|Open Access Date:||19 April 2018|
|Collection:||Thèses et mémoires|
All documents in CorpusUL are protected by Copyright Act of Canada.