Gerritsmann Hanno, Stalder Gabrielle L, Kaczensky Petra, Buuveibaatar Bayarbaatar, Payne John, Boldbaatar Sukhbaatar, Walzer Chris
1 Research Institute of Wildlife Ecology, Department of Integrative Biology and Evolution, University of Veterinary Medicine, Vienna, Savoyenstraße 1, 1160 Vienna, Austria;
2 Wildlife Conservation Society, Mongolia Program, PO Box 485, Post Office 38, Ulaanbaatar 15141, Mongolia;
J Wildl Dis. 2016 Jul;52(3):642-6. doi: 10.7589/2015-07-198. Epub 2016 May 31.
Research and conservation of wide-ranging wild equids in most cases necessitate capture and handling of individuals. For free-roaming Mongolian khulan ( Equus hemionus hemionus), also known as the khulan, capture involves a strenuous, high-speed chase, and physiologic responses have yet to be elucidated. We analyzed sequential arterial blood gas (ABG) samples as a proxy for respiratory and metabolic status of khulan during capture-related anesthesia. We recorded precise chase and induction times and monitored vital parameters and ABG from free-ranging khulan during anesthesia performed for GPS collaring. At the initiation of anesthesia, animals had ABG values similar to those recorded for thoroughbred horses ( Equus caballus ) after maximal exercise. Longer induction times resulted in higher arterial pH (P<0.001) and lower blood lactate (P<0.002). This trend of improvement continued over the course of anesthesia. The most important factor explaining pH and lactate was the time that elapsed between cessation of the chase and obtaining the first ABG sample, which, under field conditions, is tightly linked to induction time. All animals recovered uneventfully. Our data show that khulan recover and shift their metabolic status back toward expected normal values during opioid-based field anesthesia.
在大多数情况下，对广泛分布的野生马科动物进行研究和保护需要捕获和处理个体。对于自由放养的蒙古野马（Equus hemionus hemionus），也称为野马，捕获过程包括激烈的高速追逐，其生理反应尚未得到阐明。我们分析了连续的动脉血气（ABG）样本，以此作为捕获相关麻醉期间野马呼吸和代谢状态的指标。我们记录了精确的追逐和诱导时间，并在为佩戴GPS项圈进行麻醉期间监测了自由放养野马的生命体征参数和ABG。在麻醉开始时，动物的ABG值与纯种马（Equus caballus）在最大运动量后记录的值相似。诱导时间越长，动脉pH值越高（P<0.001），血乳酸越低（P<0.002）。这种改善趋势在麻醉过程中持续存在。解释pH值和乳酸的最重要因素是追逐停止到获取第一个ABG样本之间经过的时间，在野外条件下，这与诱导时间紧密相关。所有动物均顺利恢复。我们的数据表明，在基于阿片类药物的野外麻醉期间，野马能够恢复并将其代谢状态转变回预期的正常水平。
