Seal U S, Siniff D B, Tester J R, Williams T D
J Wildl Dis. 1985 Oct;21(4):411-6. doi: 10.7589/0090-3558-21.4.411.
Combinations of etorphine hydrochloride and xylazine hydrochloride in different dosages were tested for their efficacy as immobilizing agents on 16 recently captured feral mares in corrals. The results of these trials led to the utilization of a standard combination of 5.5 mg of etorphine hydrochloride, 150 mg of xylazine hydrochloride, and 3 mg of atropine sulfate in a 7-ml dart syringe for field capture. This combination was used, administered by dart gun from helicopters, to capture 87 free-ranging feral horses from about 80 bands. Five mares died at the time of capture and the remains of three other mares were found near the site of capture 4 mo later. Blood samples collected from each animal and analyzed for hematologic variables, concentrations of urea, and glucose yielded values comparable to domestic "hot-blooded horses." Serum cortisol concentrations (4.7 +/- 0.4 microgram/dl) were comparable to values from undisturbed captive animals. Approximately 48 min of helicopter time were required per horse captured. The cost per animal captured was $159 for helicopter time and $66.70 for drugs and darts.
对不同剂量的盐酸埃托啡和盐酸赛拉嗪组合作为固定剂在畜栏中对16匹新捕获的野生母马的效果进行了测试。这些试验的结果导致在7毫升飞镖注射器中使用5.5毫克盐酸埃托啡、150毫克盐酸赛拉嗪和3毫克硫酸阿托品的标准组合用于野外捕获。该组合通过直升机上的飞镖枪给药，用于从约80个马群中捕获87匹自由放养的野马。5匹母马在捕获时死亡，另外3匹母马的遗体在4个月后在捕获地点附近被发现。从每只动物采集血液样本并分析血液学变量、尿素浓度和葡萄糖，得出的值与家养“热血马”相当。血清皮质醇浓度（4.7±0.4微克/分升）与未受干扰的圈养动物的值相当。每捕获一匹马大约需要48分钟的直升机时间。每捕获一只动物的成本为直升机时间159美元，药物和飞镖66.70美元。
