贺兰山保护区冬季岩羊集群特征的初步分析

编号 zgly0000388661

文献类型 期刊论文

文献题名 贺兰山保护区冬季岩羊集群特征的初步分析

作者 曹丽荣  刘振生  王小明  胡天华  翟昊  侯建海 

作者单位 华东师范大学生命科学学院  华东师范大学生命科学学院  宁夏贺兰山国家级自然保护区管理局 

母体文献 兽类学报 

年卷期 2005,25(2)

页码 200-204

年份 2005 

分类号 TP31  TV641.43 

关键词 初步分析  保护区  贺兰山  times  ratio  total  blue  特征  集群  岩羊  冬季  with  Nature  and  Blue  Group  the  small  group  The  was  more  in  per  can  sex  age  be 

文摘内容 Group size and composition of blue sheep (Pseudois nayaur) were studied in the Helan Mountains, Ningxia Autonomous Region from November to December 2003. We scanned mountain slopes with binoculars and observed with 20 - 60 x spotting-scope. A total of 310 herds of blue sheep and 1 336 individuals were observed during the study period. Blue sheep were frequently seen in small herds of 2 to 8 individuals, which represent 94.8% of total herds observed. Herds consisting of 9 individuals or more represented 5.2%. The largest herd we observed numbered 51 individuals. Mean group size was 4.2 individuals. Blue sheep herds can be divided into three types: male herds (composed solely of males), female herds (consisting of females with or without juveniles of both sexes), and mixed herds (including adult males, females, and subadults). Among the 310 herds, female herds were counted 150 times (48.4%}, mixed herds 154 times (49.7%), and male berds 6 times (1.9%) . Of 1 336 blue sheep classified by sex and age, adults, subadults and juveniles composed 64.1%, 20.8%, and 15.1% respectively. The female: male ratio of adults was 1:0.73. The ratio of adult females to juveniles was 1:0.56, which is higher than the ratio recorded in spring ( 1:0.43) or summer ( 1:0.44). The results showed that the Helan Mountains State Nature Reserve has succeed in protecting blue sheep。