黑线毛足鼠种群数量动态及预测研究

黑线毛足鼠在我国分布于北方典型草原和半荒漠草原，是内蒙古锡郭勒草原的常见鼠种之一。笔者于１９８７－１９９６年每年５－９月在内蒙古锡郭勒盟正镶白旗天然草原，利用直线铗日法对该鼠的种群数量进行调查。十年其布放了４２７５０个铗日，捕获鼠４１２只，其中黑线毛足鼠１７９只，居第四位。

Studies on Population Dynamics and Prediction of Phodopus sungorus

Phodopus sungorus is one of the common rodent species on steppe of Inner Mongolia. Itspopulation dynamics was investigated on natural pasture in Zhegiangbai County by rectilinear-trappingmethod in the middle ten days from May to September during 1987 ~ 1996. A total efforts of 42750 trap-ping - days was made and 4121 rodents were captured, in which 179 specimens were Phodopus Sun-gorus. Population sizes of this rodent had significant seasonal difference. The seasonal patem of populationsize attained one peak in the late spring of early summer during 1987 ~ 1994, but two peaks during 1995~ 1996. There were also significant difference among years . The maximum and minimum population sizesoccurred in 1987 and 1993 respectively during the 10 years and the amplitude was 39. Prediction modelswere established with the index of capture rate. The results showed that the prediction values are close tothe actual values.