Abstract: A popu lat ion census for the golden takins (Budorcas taxicolor bedfordi) was conducted in the Fop ing Nature Reserve wh ich locates in 33°32′～33°43′N , 107°40′～107°55′E in 1996. The populat ion size was estimated to be 435～527 individuals w hich made high density of 1.29～1.56 individuals per square kilometer in the reserve. The ratio fadult female to adult male was about 1: 0.50 which was favored to female. Adult ales were consisted of 17.3% of the population, adult females came to 35.40% , ubadult s 35.03% , and calves 12.24% respectively. The annual growth rate of the takin population between 1991 and 1996 was 18.48% in average and the increase rate as much greater than that f rom 1984 to 1991. The difference of age structures between wo censuses made in 1991 and 1996 showed a trend that the proport ion of subadults beame higher. From f ield observation, we believe that migration of the animals from adjacent areas to the reserve was likely responsible for the fast population growth. Commercial logging in a non-sustainable way by the logging company in the adjacent areas as the reason to force takins move to the reserve and concentrate here.

Key words: Golden takin (Bud orcas taxicolor bedfordi ), Foping nature reserve, Population size, Age structure, Population growth rate

摘要： 1996 年对佛坪自然保护区内的羚牛种群进行了数量调查, 结果表明, 保护区内羚牛的数
量为435～ 527 只, 种群密度达到1129～ 1156 只/km²。羚牛种群的成体雌雄个体之比约为1∶0.5, 明显地偏向雌性。在羚牛种群中幼仔占12.24% , 亚成体占35.03% , 成年雄性个体占17.33% , 成年雌性个体占35.40%。该羚牛种群在1991 年至1996 年间的年均增长率为18.48% , 明显高于1984 至1991 年间羚牛种群的年均增长率。保护区周边地区的生境不断丧失, 迫使羚牛向保护区境内迁移, 是保护区内羚牛种群数量在短期内迅速升高的原因。

关键词: 羚牛, 佛坪自然保护区, 种群数量, 年龄结构, 种群增长率