【摘要】 目的观察内蒙古中西部地区五趾跳鼠数量变动规律,为预测预报和防制提供依据。方法利用直线夹日法,在呼和浩特、正镶白旗和达拉特旗的不同生境内,每年4-10月(正镶白旗5-9月)中旬进行调查,收集五趾跳鼠的生态学资料,然后在实验室内进行分析。结果五趾跳鼠在3地属于常见种类,密度较低。其数量季节变动曲线有地区差异,在呼和浩特和达拉特旗呈单峰型,高峰在每年的春季;正镶白旗呈双峰型,前峰在春季,后峰在夏季,前峰高于后峰。该鼠种群数量年间变化3地略有不同,呼和浩特数量较高,正镶白旗次之,达拉特旗数量最低。结论由于五趾跳鼠数量较少,看不出年度间变动规律,它的数量变动与其怀孕率、繁殖指数和调查地区优势鼠种的数量均有一定的关系。更多还原

【Abstract】 Objective The regularity of population dynamics of mongolia five toed jerboa (Allactaga sibirica) were studies in the central and western region of Inner Mongolia to provide the basis of prediction and control. Methods The population dynamics of mongolia five toed jerboa was investigated by rectilinear-trapping method in the middle ten days of each month from April to October in Hohhot suburbs,Dalate County and from May to September in Zhengxiangbai county. Results Mongolia five toed jerboa was the common species but the population number of them were less in Hohhot suburbs, Dalate county and Zhengxiangbai county. The seasonal fluctuation of mongdia five toea jerboa population were different in Hohhot suburbs,Dalat Xounty and Zhengxiangbai county. The seasonal fluctuation was the type of single peak and the peak of them was in spring season in Hohhot suburbs and Dalat county. The seasonal fluctuation was the type of double peak and the first peak was taller than second in Zhengxiangbai county. An annual fluctuation of population number were different in Hohhot suburbs, Dalat county and Zhengxiangbai county. The tallest in Hohhot suburbs, second with Zhengxiangbai county, and then with Dalate county. Conclusion The important elements affecting it’s population dynamics are the pregnant rate, reproduction index and the population number of other species (northern three-toed jerboa, little Chinese jird, desert hamster and striped hamster) in the investigated region.更多还原