摘要
目的 研究草原兔尾鼠 (Laguruslagurus)的种群生命表、内禀增长率和稳定年龄分布。 方法 2 0 0 0年 9月至2 0 0 1年 9月在新疆木垒县分 4个时段采用样方对草原兔尾鼠进行野外调查 ,在实验室采用数学生态学的方法。结果 随着草原兔尾鼠种群数量的下降 ,种群的内禀增长率和周限增长率不是随着种群数量的下降而下降 ,而是发生了波动 ,2 0 0 0年 9月rm=-0 .5 5 2 ,λ =0 .5 76,2 0 0 1年 4月rm=0 .2 71,λ =1.3 13 ,2 0 0 1年 7月rm=0 .3 72 ,λ =1.45 1;在不同时期草原兔尾鼠种群的平均世代时间 (T)基本保持不变 ,稳定在 3 .0～ 3 .5之间。结论 种群的稳定年龄分布结构不同时期并不完全相同 ,2 0 0 0年 9月和 2 0 0 1年 7月属下降型种群结构 ,2 0 0 1年 4月属增长型种群结构 。
Objective\ To systematically study the population structure of L.lagurus at lab. Method From September 2000 to September 2001, the field investigation at four stages was carried out in Mori County, Xinjiang, respectively. Mathematical ecology was applied. Result (1) The innate rate of increase and finite rate of increase of Lagurus lagurus population was not decrease with the decline of the population quantity,but there were some fluctuations in the rate as the follow: r m =-0.552, λ=0.576 in September, 2000; r m = 0.271, λ=1.313 in April, 2001; and r m =0.372,λ=1.451 in July, 2001; (2)The mean length of a generation(T)of Lagurus lagurus population at different stages remained unchanged, they were 3.0～3.5. Conclusion The structures of stable age distribution of Lagurus lagurus population at different stages were various, they belonged to the structure of decline in September, 2000 and July, 2001,and it was the structure of increase in April, 2001.
出处
《地方病通报》
2004年第2期4-9,共6页
Endemic Diseases Bulletin
基金
中国科学院"西部之光"项目 (2 0 0 0 0 50 60 1 )
关键词
草原免尾鼠
种群
生命表
稳定年龄结构
木垒
新疆
Lagurus lagurus
Population
Life table
Stable age distribution
Mori County, Xinjiang, China
