Universidad Autónoma Metropolitana, Stress Physiology and Farm Animal Welfare, Department of Animal Production and Agriculture, Col. Villa Quietud, México, DF, Mexico.
Meat Sci. 2012 Apr;90(4):893-8. doi: 10.1016/j.meatsci.2011.11.027. Epub 2011 Nov 23.
The aim of the study was to evaluate the effect of two stressful stimuli, long transportation and 80% CO(2) stunning on metabolic-physiological variables, hemodynamic and gas exchange in slaughter pigs imported from the U.S. to Mexico City with a journey time of 27 h, with 8 h of lairage at the abattoir. A total of 589 pigs from three genders were monitored. Overall results show that both stimuli caused metabolic and physiological disturbance. Gilts were more efficient in controlling glycemia after a long transport journey (24h), than castrated males (P<0.05), whose glucose was increased above the 30 mg/dL basal level. Females on arrival had 23mg/dL more lactate compared to basal levels (P<0.05). Stunning caused more physiological effects compared to transportation. Regarding the gender factor, females and entire males were more susceptible to transport stress and stunning compared to the castrated pigs, and entire males showed more complications restoring the gas exchange compared to females and barrows.
本研究旨在评估两种应激刺激，长途运输和 80%CO2 致昏对从美国进口到墨西哥城的屠宰猪的代谢-生理变量、血液动力学和气体交换的影响，运输时间为 27 小时，在屠宰场停食 8 小时。共监测了来自三个性别的 589 头猪。总体结果表明，这两种刺激都会导致代谢和生理紊乱。与去势公猪相比（P<0.05），母猪在长途运输后（24 小时）更有效地控制血糖，其血糖升高超过基础水平 30mg/dL。到达时，母猪的乳酸水平比基础水平高 23mg/dL（P<0.05）。与运输相比，致昏引起了更多的生理影响。关于性别因素，与去势猪相比，母猪和公猪更容易受到运输应激和致昏的影响，与母猪和小公猪相比，整个公猪在恢复气体交换方面表现出更多的并发症。
