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Rectal temperature responses of pigs transported by road and administered with ascorbic acid during the hot-dry season

机译:干热季节公路运输和抗坏血酸投喂的猪的直肠温度响应

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Experiments were performed in order to determine the rectal temperature (RT) responses of pigs to eight-hour road transportation and the effect of administration of ascorbic acid (AA) on the responses in transported pigs during the hot-dry season. Twenty three experimental pigs were given AA orally and individually at 100 mg/kg prior to the transportation, while thirteen control pigs were administered with 20 ml of drinking water. The RTs of the pigs were measured by inserting a clinical thermometer (Hartman Company, England) into the rectum via the anus. The ambient temperature (AT) and relative humidity (RH) were measured concurrently with the RT. The AT and RH values ranged between 23.5 - 39.0°C and 43 - 97% respectively. The values were outside the thermo-neutral zone for the pig, indicating that the season was thermally stressful. The AT values, which fluctuated with the hour of the day and increased with the hour of the journey, were significantly (P 0.05) with the corresponding value of 39.4 ± 0.3°C in control pigs, demonstrating that AA did not induce hypothermia in experimental pigs. In conclusion, transportation of pigs by road for 8 h in the zone induces hyperthermia and administration of AA in the experimental pigs did not induce hypothermia. Optimum duration of road transportation of pigs is 6 h. This duration should be considered in the development of guidelines and welfare for pigs, transported by road during the hot-dry season.
机译:为了确定猪对八小时道路运输的直肠温度(RT)反应以及在炎热干燥季节施用抗坏血酸(AA)对运输猪反应的影响,进行了实验。在运输前,对23头实验猪分别以100 mg / kg的剂量口服AA,而对13头对照猪则给予20 ml饮用水。通过将临床温度计(Hartman Company,England)通过肛门插入直肠来测量猪的RT。与RT同时测量环境温度(AT)和相对湿度(RH)。 AT和RH值分别在23.5-39.0°C和43-97%之间。该值在猪的热中性区之外,表明该季节是热应激状态。 AT值随一天中的小时而波动,并随行程的小时而增加,在对照组猪中显着(P 0.05),对应值为39.4±0.3°C,表明在实验中AA不会诱发体温过低猪。总之,在该区域通过公路运输猪8 h会引起体温过高,而实验猪施用AA并不会引起体温过低。猪的道路运输的最佳持续时间为6小时。在制定干猪的指导方针和福利时,应考虑这个持续时间,在炎热干燥的季节通过陆路运输。

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