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1985年4～5月,按路线法对内蒙古自治区呼伦贝尔盟西部草原地带蒙古旱獭(Marmota sibirica)和达乌尔黄鼠(Citellus dauricus)的分布与种群密度做了调查。结果表明,旱獭在该地带的分布为:西起中苏、中蒙边境,东至大兴安岭西坡山麓地带;北起北纬50°20′左右,南至中蒙边境;上述旱獭分布区域又被天然屏障分割成3个相对孤立的小区:海拉尔河北部小区,海拉尔河南部西小区,河拉尔河南部东小区。后两个小区之间是一片平缓草原,无旱獭分布。 海拉尔河北部小区内有4块岛状地段,其中旱獭群落覆盖率为40～70％,平均密度每公顷0.39只,其余地段旱獭呈点状分布,每公顷0.01只;海拉尔河南部旱獭均呈点状分布,每公顷0.0024只。 根据旱獭分布特征与密度以及有关资料分析认为:呼伦贝尔盟历史鼠疫自然疫源地的地理位置在海拉尔河南部西小区与海拉尔河北部小区内;并推测前者的疫源性已经消失,后者疫源性可能依然存在;海拉尔河南部东小区,既往和现今,旱獭均呈点状分布,不会存在疫源性。 黄鼠在呼盟西部草原地带呈点状分布,其密度为每平方公里0.12～0.59只,黄鼠在该地带不能成为鼠疫主要储存宿主。
From April to May 1985, the distribution and population density of Marmota sibirica and Citellus dauricus in the western grassland of Hulun Buir League in Inner Mongolia Autonomous Region were investigated by the route method. The results showed that the distribution of Marmota in this zone was from the Sino-Soviet border to the Sino-Mongolian border in the west and to the foothill of the western slope of Daxinganling in the east. From the north latitude about 50 ° 20 ’north and south to the border between China and Mongolia, The barrier is divided into three relatively isolated areas: the northern Hailar district, the southern district of Hailar River, and the southern district of the River Lal River. After the two plots is a gentle steppe, no Marmot distribution. There are 4 islands in the northern Hailar district, among them, the community coverage of Marmota is 40-70% and the average density is 0.39 per hectare. The other sections have a distribution of 0.01 per hectare, and the number of marmots in southern Hailaer is Shaped distribution, 0.0024 per hectare. According to the distribution characteristics and density of marmot and the related data analysis, it is concluded that the geographical location of the natural foci of historical plague in Hulun Buir is located in the south district of Hailaer River and the northern district of Hailar River; and the foci of the former have disappeared, Sex may still exist; the southern district of Hailaer River, past and present, marmots were dotted distribution, there will be no foci. The cynomolgus was distributed in a dotted pattern in the western grassland of Huemeng, with a density of 0.12 ~ 0.59 per square kilometer. The gopher can not become the main storage host of the plague in this zone.