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STUDIES ON THE POPULATION REPRODUCTION CHARACTERISTICS OF DAURIAN GROUND SQUIRREL (Spermophitus dauricus)

WANG Tingzheng, LIU Jiakun, SHAO Mengming, LIU Shu, ZOU Bo   

  • Online:2006-07-27 Published:2007-07-20

达乌尔黄鼠种群繁殖特征的研究

王廷明, 刘加坤, 邵盂明, 柳枢, 邹波   

  1. 陕西师范大学生物系, 西安

Abstract: The population reproduction characteristics of daurian ground squirrel (Spermophlus dauricus)were studied in Fenyang,Quwo county of Shanxi Province,and Yanchang,Heyang county of Shaanxi Province from 1987 to 1989.The studies included mating, pregnancy,litter size,testis pt sis of the male.The results obtained are summarized as below.
1.The mating seasons of daurian ground squirrel began in the mid ten days of March in Quwo.He yang county and in the last ten days of March in Fenyang,Yanchang county.
2.The pregnancy rate of females varied along with the area and years.The reproduction peaks appeared in the last ten days of April to the early ten days of May. It was also observed that the variation of pregnancy rate was relation to the yearly population density.The reproduction peaks of males appeared earlier than females about 10 days.
3.The average litter sizes was 4.72±0.12 in Fenyang,4.59±0.09 in Quwo,4.65±0.24 in Yanch ang and 5.43±0.15 in Heyang .
4.The rate of embryo-absorbing of pregnancy females were 13.33%in Quwo,and 10.30% in Heyang.

Key words: Daurian ground squirrel(SpermophiLUs dasricss), Population, Reproduction characteristics

摘要: 本文主要报道山西省汾阳和曲沃地区以及陕西省台用和延长地区的达乌尔黄鼠(Spermophilus daur~cus)种群的繁殖特征。 在曲沃和台阳地区,该鼠3月中旬开始交尾,在汾阳和延长地区旦 始于3月下旬交尾。雌体妊娠的高峰期在4月下旬至5月上旬,雄体比雌体提前10天左右进人繁殖高峰期。平均胎仔数因地区而异,台阳地区最高(5.4 3±0.15),次为曲沃、汾阳,延长地区最低(4.65±0.24)。

关键词: 选乌尔黄鼠, 种群, 繁殖特征