摘要
目的 :研究鄂尔多斯沙地草场小毛足鼠种群数量动态 ,并对其种群数量进行预测。方法 :1991～ 1996年每年 4～ 10月的每月中旬在沙地草场的 6种生境内 ,采用直线夹日法调查 ,以捕获率 ( % )表示种群密度 ,并利用捕获率和繁殖指数为指标建立预测模型。结果 :6年中该鼠平均季节消长曲线呈单峰型 ,7月为最高峰 ,4月为最低峰 ,相差最多的 1993年 ,最高峰是最低峰的10 .5倍。 6年中该鼠数量年度变化经历了低谷—高峰—下降—低谷 4个阶段 ,即 1991～ 1992年为低谷期 ,1993年为高峰期 ,1994年为下降期 ,1995～ 1996年又为低谷期。利用捕获率作指标建立了 4个短期预测模型 ;用繁殖指数为指标分别建立了中、长期预测模型。结论 :种群数量季节消长各年间有明显差异 ;1995年开始进行预测预报 ,预测比较准确。
Population dynamics of Phodopus roborovskii was investigated on ordos sandland by rectilinear trapping method in the middle ten days of April to October during 1991-1996. A total efforts of 124 245 trapping days was made and 7 498 rodents were captured in which 2 411 specimens were Phodopus roborovskii . Seasonal fluctuations of its population numbers were significant and existed significant difference among years. In general,there was only one peak and one valley which occurred in July and in May respectively in a year. The population dynamics among years has undergone a complete cyclical fluctuations consisting of 4 phases. The 4 phases were valley,increase,peak and decrease which occurred in 1991-1992,1992-1993,1993 and 1994 respectively. Another period started again from 1995,which was the valley phase. Prediction models were established with the index of capture rate for short term models,reproduction index for middle and long term models.
出处
《中国媒介生物学及控制杂志》
CAS
CSCD
2000年第1期7-10,共4页
Chinese Journal of Vector Biology and Control
基金
农业部"八五"和"九五"重点课题的部分内容
中国农业科学院院长基金
关键词
小毛足鼠
种群数量
预测预报
季节
害鼠
防制
Phodopus roborovskii
Population number
Prediction and forecast
