• • 上一篇    下一篇

京津地区大仓鼠种群年龄结构的研究

张洁   

  1. 中国科学院动物研究所
  • 出版日期:2011-11-23 发布日期:2011-11-22

STUDY ON THE POPULATION AGE-STRUCTURE OF THE GREATER LONG-TAILED HAMSTERS IN BEIJING-TIANJIN AREA

ZHANG Jie   

  1. Institute of Zoology, Academia Sinica
  • Online:2011-11-23 Published:2011-11-22

摘要: 大仓鼠(Cricetulus triton)主要分布于我国季风温带的一些地区,为京津及华北地区农田的主要害鼠之一。以往虽有一些报道(刘焕金,1982;寿振黄,1962;B-,1952),但对种群生态的系统研究报道尚未见到。 种群年龄结构中各年龄组的比例,是研究种群繁殖、分析种群数量发展和变化的基础,是种群生态研究中首先要搞清楚的问题。

关键词: 大仓鼠, 种群年龄结构, 种群生态学, 胴体重

Abstract: The author studied the population ecology of the greater long-tailed hamsters from April, 1983 to June, 1985 in Beijing-Tianjin area.A total of 989 speciemens were obtained, among which 508 were males and 481 females.This paper reports the following results of the study on the population age-structure.1. With the body weight excluding all the viscera as a major index,speciemens were divided into four age groups,Group I . Juvenile : The weight was≤40g.Group Ⅱ .Subadult:The weight was 40. 1-75g.GroupⅢ Adult( 1 ):The weight was 75. 1-120g.GroupⅣ.Adult(2 )sThe weight was>120g.This division of age groups is relatively accurate and easy to practice.2. The population size of different age groups varies with different seasons. Two peaks of juveniles'quantity occured in May and Aug.For the subadults it occured in Aug. -Sep.,adult( 1 )in Oct.,adult(2 ) in this Oct. - next Apr..3. The total sex ratio is ♂ > ♀, and the sex radio between ♂to ♀ increases with the age of Gricetulus triton.

Key words: Greater long-tailed hamster, Cricetulus triton, Population-age-structure, Population ecology, The body weight excluding viscera