关键词: 黑线姬鼠, 生境, 构成比, 幼成比, 性比, 种群密度

Abstract: Studies on dynamic state of A. agrarius infestation in eight habitats have been done in Jilin Province. A.agrarius was the dominant species in most of habitat, constitution ratio of A. agrarius in four habitats surpasses 30%. Constitution ratio of A.agrarius in every year were different. Age ratio (young/adult) inevery habitat and year were different . Sex ratio ( male/female) in every habitat were identifiable, but in every year were different. The curve of A. agrarius population density of each month during eight years shows that the population density come down every year and the range of fall reduces year by year. There were two speaks of population density every year (on June to July and September to October) .These laws were approximately the same to that the EHF morbidity changes.