摘要
目的 研究长爪沙鼠的种群数量变动特征。方法 于 1984～ 2 0 0 2年在内蒙古呼和浩特郊区的农田、栽培牧草地和放牧场等不同生境内 ,利用直线夹日法调查。结果 该鼠属于种群数量极不稳定的种类 ,其年均捕获率变化经历了低谷—上升—高峰—下降—低谷 5个时期 ;各个时期在种群的数量、数量季节变动、睾丸下降率、雌性怀孕率、具有胎盘斑率、雌性参加繁殖率、二次产仔率、胎仔数、繁殖指数等方面有各自的特点 ;初步分析了该鼠的种群数量变动因素 ,主要有怀孕率、种群数量、种间竞争等。结论 研究长爪沙鼠种群数量变动的特征 ,可为预测预报和防制提供依据。
Objective The characteristics of population dynamics of clawed jird (Meriones unguiculatus Milne-Edwards) were studied. Methods The population size of the clawed jird was studied in the years of 1984-2002, from April to October at suburban areas of Huhhot, Inner Mongolia, by rectilinear trap-day method. Results The population size of the clawed jird underwent a cycle of “ steady- increase- peak- decrease-steady”. The rate of scrotal sac of male, pregnancy rate, the litter size, the numbers of placental scar and reproduction index was differentiated in the different periods of the population. Conclusion The studies on the characteristics of population dynamics of clawed jird present the basis for predicton and control of the clawed Jind.
出处
《中国媒介生物学及控制杂志》
CAS
CSCD
2004年第2期88-91,共4页
Chinese Journal of Vector Biology and Control
基金
"六五"至"八五"农业部重点课题
农业部畜牧兽医总站资助
内蒙古草原工作站资助
农业部草地资源重点开放实验室的资助
