关键词: 高原鼢鼠, 种群动态, 扩散

Abstract: This paper deals with the population dynamics and dispersal behaviour of plateau zokor by removal method in the natural condition. The result showed that the population density of plateau zokor shifted with different place, the area of soil being loose and food being abundant had the high density. The population numbers closed to carrying capacity and the population structure were relatively stable for natural population before removal and residents after removal, the numbers of their adult occupied 74 percent of total number, respectively, sexratio was 1:1. The density of dispersers was low , the number of their young males relatively increased and the number of their adult females decreased to 63% , but sex ratio also was 1:1. The distance between the adjacentest animals was affectd by the density and was not significantly different between sex, the distribution was mosaica pattern. The disperal averaged 26.5% of the resident population,the dispersing distance was affected by soil factor and averaged 66.9 meters. Body weight of adult dispersersw as less than that of adult residents, and had no differece between young dispersers and young residents. The main factor affecting the dispersal was carrying capacity effect, when the population density reached to the carrying capacity,the part of population dispersed out because of increase of aggression and food competition among individuals.

Key words: Plateau zokor (Myospalax baileyi), Population dynamics, Dispersal