摘要
本文报道了１９８７～１９９５年贵州余庆县黑线姬鼠的种群繁殖特征。共解剖标本３９６４只（雌性１９６６只，雌性１９９８只）。主要繁殖期在３～１１月，研究期间的月平均怀孕率４６．８３％；平均胎仔数为５．４８±０．０６只；繁殖指数为１．２８±０．０７；每年４～５月和８～９月为两次妊娠高峰。雄鼠睾丸下降率和雌鼠怀孕率有同步变动趋势。不同年龄组之间繁殖力存在显著性差异。
The population reproduction of A podemus agrarius in Yuqing county of Guizhou was investigated from1987～1995.A total numberof 3964,specimens were collected and dissected,among which 1966 were males.and 1998 females.In main breeding season,the mean pregnent rate,Iitter size and teproductive index ofeight years were 46.83%,5.48±0.06 and 1.28±0.07 respeclively.The fluctuations of the rate of testis inscrotum and the rate of female pregnancy were identificd.The reproductive difference among the age groupswas significant.
出处
《贵州农业科学》
CAS
1996年第1期15-19,共5页
Guizhou Agricultural Sciences
关键词
黑线姬鼠
种群
繁殖
害鼠
Apodemus agrarius
population
reproduction
