Fazio E, Medica P, Cravana C, Giacoppo E, Ferlazzo A
Department of Morphology, Biochemistry, Physiology and Animal Production - Unit of Veterinary Physiology, Faculty of Veterinary Medicine, University of Messina, Polo Universitario Annunziata, 98168 Messina, Italy.
Animal. 2009 Sep;3(9):1313-8. doi: 10.1017/S1751731109004777.
In order to investigate the effects of short road transport stress on total and free iodothyronines, body weight (BW), rectal temperature and heart rate (HR) changes, 126 healthy stallions were studied in basal conditions, before and after transport. A total of 60 Thoroughbred and 66 crossbred stallions aged 4 to 15 years with previous travelling experience were transported by road in a commercial trailer for a period of about 3 to 4 h (distance under 300 km). Blood samples and functional variables were collected in each horse box, one week before loading and transport in basal conditions (control samples), one week later immediately before loading (pre-samples) and again after transport and unloading (about 3 to 4 h) in each new horse box, within 30 min of their arrival at the breeding stations (post-samples). Compared to the before-transport values, increases in circulating T3, T4 and fT4 levels (P < 0.01) were observed after transport, irrespective of breed, but not for fT3 levels. Lower T4 and fT4 levels were observed in basal II (at 1100 h) (P < 0.01) than in basal I (at 0800 h) conditions and before transport. Thoroughbreds showed higher fT3 (P < 0.05) and fT4 (P < 0.01) levels after transport than crossbred stallions. No significant differences were observed for T3 and T4. Compared to the before-transport values, significant increases in rectal temperature (P < 0.01) and HR (P < 0.05) were observed after transport. No differences were observed between basal I, II and before values for functional variables. Significant correlations between T3 and rectal temperature, BW and HR were found. The results indicate that short road transport induces a preferential release of T3, T4 and fT4 hormones from the thyroid gland in relation to different breed, and an increase in rectal temperature and HR. No significant changes in BW were observed. No differences were observed in relation to different ages. The data obtained suggest that the stallion's thyroid hormones and functional variables may play an important role in assessing the effects of transport stress and a horse's coping strategy.
为了研究短途公路运输应激对总甲状腺素和游离甲状腺素、体重（BW）、直肠温度和心率（HR）变化的影响，对126匹健康种马在运输前、运输中和运输后的基础状态下进行了研究。共有60匹纯种马和66匹杂交种马，年龄在4至15岁之间，有过运输经历，用商业拖车进行约3至4小时（距离在300公里以内）的公路运输。在每匹马厩中，于装车和运输前一周（基础状态下的对照样本）、一周后装车前（预样本）以及运输和卸载后（约3至4小时），在它们抵达繁殖站后30分钟内（后样本）采集血样和功能变量。与运输前的值相比，运输后循环T3、T4和fT4水平升高（P < 0.01），与品种无关，但fT3水平未升高。基础状态II（上午11点）时的T4和fT4水平低于基础状态I（上午8点）和运输前（P < 0.01）。运输后，纯种马的fT3（P < 0.05）和fT4（P < 0.01）水平高于杂交种马。T3和T4未观察到显著差异。与运输前的值相比，运输后直肠温度显著升高（P < 0.01），心率升高（P < 0.05）。基础状态I、II以及功能变量的运输前值之间未观察到差异。发现T3与直肠温度、体重和心率之间存在显著相关性。结果表明，短途公路运输会导致甲状腺优先释放T3、T4和fT4激素，与品种不同有关，同时直肠温度和心率升高。体重未观察到显著变化。不同年龄之间未观察到差异。所获得的数据表明，种马的甲状腺激素和功能变量可能在评估运输应激的影响和马匹的应对策略中起重要作用。
Zotero 插件