花鼠种群年龄和繁殖的初步研究  

A PRIMARY STUDY ON THE POPULATION AGE AND REPRODUCTION OF EUTAMIAS SIBIRICUS

作　　者：卢欣[1] 

机构地区：[1]山西省生物研究所,太原030006

出　　处：《兽类学报》1993年第4期288-295,共8页Acta Theriologica Sinica

摘　　要：1991年3—10月在山西省中条山区猎获花鼠202只。以眼晶体干重为指标划分出4个年龄组,分析了种群年龄组成的季节变化。该鼠每年繁殖1次,3月下旬一4月中旬怀孕,产仔期在4月中旬—5月中旬,胎仔数5.08±0.16只,6月上旬幼鼠出现。幼鼠于翌年春季出垫后参加繁殖。此外,还将晶体干重、齿高指数和臼齿磨损程度3种年龄指标所划分的结果作了比较;也证实体重、体长和尾长不能用于该鼠的年龄鉴定。This paper reports the population age and reproduction of Eutamias sibiricus. 202 specimens were shot in the Zhongtiao mountains of Shanxi province during March to October of 1991.Based on their eye lens weight,the specimens were divided into 4 age groups. Seasonal changes of the population age structure were analysed.This chipmunk reproduced once a year.The gestation period lasted from late-March to mid-April and the birth period from mid-April to mid-May.The litter size was 5.08±0.16.The juveniles born in early-June. All juveniles born in last year joined breeding after hibernation. The teeth height index and the degree of molar worn also could be used to divide the population classes,but eye lens weight was the most accurate.It was not applicable to estimate the age of this chipmunk by means of the body weight, body length and tail length.

关 键 词：花鼠 年龄 繁殖 

分 类 号：Q959.837[生物学—动物学]