摘要
社鼠(Rattus niviventer confucianus)和针毛鼠(Rattus fulvescens huang)系福建省山区的山地生活类型的优势啮齿动物,在武夷山自然保护区内尤见广泛分布。它们的种群数量直接左右着保护区山地的鼠群密度。种群年龄组成是种群的重要特征之一。开展种群年龄组成和数量动态的分析研究,将有助于了解种群数量变动的规律。
This paper is a part of a series of studies on the ecology of two species of mountain rats,Rattus niviventer confucianus and R.fulvescens huang. The data on the age structure of the population were obtained from 179 rats captured in Wuyishan Nature Reserve.An attempt had been made to study the relationships between the age structure of these populations and the status of reproduction.The results may be summarized below. Based on the degree of teeth wear,4 age groups were recognized.Teeth wear of R.n.confucianus are shown in figures 1—8,and those of R.f. huang in figures 9—16. 1.Juvenile group:Teeth wear as shown in figures 1,2,9,10. 2.Subadult group:Teeth wear as shown in figures 3,4,11,12. 3.Adult group:Teeth wear as shown in figures 5,6,13,14. 4.Older group:Teeth wear as shown in figures 7,8,15,16. The age structure in the population during the period of reproduction from September until December is shown in Table l.The peak of the rate of pregnancy reached 59.29%in September,whence the adults and the older individuals constituted 64.84% of the population.After September,the rate of pregnancy was decreasing.In September,subadults were predominant in number,constituting 74.47% of the population.During this time,the adults and the older individuals constituted 23.40% of the population,and no pregnant individuals had been found.The population density of the mountain rats remained stable in the Wuyishan area.
出处
《武夷科学》
1985年第1期197-207,共11页
Wuyi Science Journal
