中国媒介生物学及控制杂志

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长爪沙鼠种群数量变动特征的研究

董维惠1;侯希贤1;杨玉平1;王梦龙2;郑双悦2;张卓然2   

  1. 1中国农业科学院草原研究所 呼和浩特010010;2内蒙古草原工作站
  • 出版日期:2004-04-20 发布日期:2004-04-20

Studies on the Characteristic of Population Dynamics of the Clawed Jird

DONG Wei-hui; HOU Xi-xian; YANG Yu-ping; et al   

  1. Grassland Research Institute, Chinese Academy of Agricultural Sciences, Huhhot 010010,China
  • Online:2004-04-20 Published:2004-04-20

摘要: 目的研究长爪沙鼠的种群数量变动特征。方法于1984~2002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。

关键词: 繁殖, 怀孕率, 繁殖指数, 种群数量

Abstract: 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.