关键词: 蒙古野驴, 数量, 分布, 保护对策

Abstract: From mid-July to early August 2000 , a large herds of Mongolian wild ass emigrated from Republic of Mongolia into Wulate Zhongqi and Wulate Houqi of Bayannaor League in Inner Mongolia Autonomous Region , China. We investigated the distribution range , population size and current conservation status of Mongolian wild ass in September 2000. The southern border of the distribution region of the wild ass ranged from Dundewusu village of Wulate Zhongqi (42°17′N , 108°30′E) to the west of Wulijitu village of Wulate Houqi (42°08′N , 106°36′E) . The national boundary between China and Mongolia is the northern border of the current range of the wild ass. The current distribution area of the wild ass is 5 380 km² , and the estimated total numbers of Mongolian wild ass is 11 400 according to the belt transects method. The current distribution of Mongolian wild ass in the region is still not quite stable. High density of wild ass , frequent human activities , limited pastures , and poaching are the main factors to threat their survival in the region.

Key words: Mongolian wild ass ( Equus hemionus hemionus), Population size, Distribution range, Conservation