中华秋沙鸭在长白山地区的分布和种群数量

中华秋沙鸭(Mergus squamatus)主要分布在西伯利亚东南部、朝鲜和我国。是一种分布区域狭窄、数量稀少的珍稀濒危鸟类。已被列入世界濒危动物红皮书和我国Ⅰ级保护动物。据作者1962以来的调查资料表明,长白山是中华秋沙鸭在我国的本要繁殖地。主要分布在长白山东北坡的头道白河、三道白河、古洞河及其支流和西南坡的漫江、锦江及其支流。据我们1977—1978和1989—1991年调查约40—50对,种群数量呈减少趋势。原因是环境恶化和人为干扰。

BREEDING POPULATION DENSITY OF CHINESE MERGANSER IN CHANGBAI MOUNTAIN

The Chinese merganser (Mergus squamatus) is a rare species, it has a limited distribution area and in the International Red Data Book as a threatened species. The number of which shows a tendency to reduction. From 1962 to 1991, the population, distribution was studied in the Changbai Mountain. They inhabit mostly in the Tou Dao Bai river, San Dao Bai river, Gu Tong river and Mangjiang river in the mixed forests of conifers and broad-leaved species in Changbai Mountains. According to the 1977-1979 survey in Changbai Mountains region, the population density of the Chinese merganser on the Tou Dao Bai river was 0.72 ind/per km, 1989 was 0.66 ind / per km, 1990 was 0.63 ind / per km, 1991 was 0.50 ind/per Km, is falling gradually. The reason population density is falling was due to deforest, the breeding habitats of this species are being destroyed and popular disturbance.