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灰旱獭生命表和繁殖的初步研究

杨赣源, 张兰英, 陈欣如   

  1. 新疆维吾尔自治区地方病防治研究所
  • 出版日期:2011-11-23 发布日期:2011-11-22

A PRELIMINARY STUDY ON THE LIFE TABLE AND REPRODUCTION OF THE MARMOTA BAIBACINA

YANG Ganyuan, ZHANG Lanying, CHEN Xinru   

  1. Institute of Endemic Disease Control, Xinjiang Uyghur Autonomous Region, China
  • Online:2011-11-23 Published:2011-11-22

摘要: 1985年4—9月,于野外捕捉灰旱獭(Marmota baibacina)911只,经鉴定划分为12个年龄组,用生命表法探讨该种群数量动态。灰旱獭的期望寿命(ex)雌雄分别为3.4393、2.8798年,平均死亡率(q)雌雄分别为0.2956、0.2538。繁殖力以第5—8年龄组较强。妊娠期35—40天。哺乳期约30天。平均产仔数6.027只。内禀增长率(rm)为0.1695/年。周限增长率(λ)为1.1847/年。世代时间(T)为7.1436/年。种群经一世代的净增殖率(R0)为3.3574。

关键词: 灰旱獭, 种群年龄组成, 生命表, 繁殖

Abstract: Nine hundred and eleven( 521, 390) specimens of gray marmot (Marmota baibacina) were collected at eastern Yelehaberto Mountain of Tianshan Mountain range from April to August, 1985. The results were as follows:The age pyramid in population showed a tendency to increase. The survival curve having the shape of a half moon.The static life table of population of gray marmot was studied.The mean mortality (qx of the females was 0.2538,and that of the male 0.2956. The mean life expectancy (e0) of the female was 3.4393 years, and that of the male 2.8798 years.The instantaneous increasing rate(rm) was 0.1695/year, the finite increasing rate(λ) 1.1847/year, the net productive capacity(R0) was 3.3574 per generation.

Key words: Gray marmot, Marmota baibacina, Population age composition, Static life table, Reproduction