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LIFE TABLE AND REPROUCTION OF ALASHAN GROUND SQUIRREL

CHEN Jingxian   

  • Online:2006-08-09 Published:2007-09-14

阿拉善黄鼠的生命表及繁殖

陈敬先   

  1. 甘肃省地方病防治研究所

Abstract: Specimens of wild Alashan ground squirrel (Spermophitus daurlcus alachanicus) have been got at Huan county, Gansuprovinceand eight ageintervals of the specimenshave been determined. According to the specimens,the life table has been studied.The results are as follows:Themean mortality(qx)ofground squirrel0.7512 (♂ ) and 0.6222 (♀) respectively;the mean lifeis 1.3311 year(♂ )and 1.6073 year (♀) respectively (Table1).The net reproductive rate (R0) is 1.7327 yearpergeneration. The intrinsic rate of in crease(instantaneous) (rm) is 0.1433/year;themean time per generation(T) is 3.8346 yearand the finite increasing rate (λ) is 1.1541 year(Table 3).

Key words: Alashan ground squirrel, Spermophilu darieus alaehanicus, Lifetable, Reproduction

摘要: 将采自野生种群的阿拉善黄鼠(Spermophilus dauricus alaschanicus Buechner)( 下称黄鼠)样本划分为8个年龄间隔,然后编制生命表。结果表明,黄鼠的平均死亡率(qx)为0.7512(♂)和0.6222(♀),平均寿命为1.3311年(♂)和1.1073年(♀)。0-l岁龄黄鼠的期望寿命(ex)为0.8311年(♂)和1.1073年(♀)。世代净增殖率(Ro)每代为l.7327。种群内禀增长率(瞬时)(rm)为0.1433,世代平均时间(T)为3.8346年,周限增长率(r)为1.1541/年。

关键词: 阿拉善黄鼠, 生命表, 繁殖