重庆市武隆县和彭水县交界处白颊黑叶猴种群初步调查

PRELIMINARY SURVEY ON POPULATION OF FRANCOIS' LANGUR (TRACHYPITHECUS FRANCOISI FRANCOISI) IN WULONG COUNTY AND PENGSHUI COUNTY

1998年 4月至 2 0 0 1年 1 2月 ,对重庆市武隆县和彭水县交界处的白颊黑叶猴种群进行了 4次调查。结果表明 ,该交界处有 4个黑叶猴家族群栖息 ,其中数量最多的 1群曾达到 1 7～ 1 8只个体 ,最少的 1群为 5只左右 ,目前调查统计到的个体总数量约 40～ 45只。以常绿阔叶树为主的”斑块状”天然阔叶林地是黑叶猴栖息地生境的主要特征。影响武隆县和彭水县黑叶猴种群数量和分布区缩减的主要原因是 :人类频繁活动、栖息地破碎化和生境条件的变化 ,很大可能还有生殖隔离的影响。

Between April 1998 and December 2001, a preliminary survey was made on population of Francois' langur in Wulong and Pengshui Counties From the four investigations, four families of Francois' langur were found to make their home at the juncture of the two counties The largest population ever observed was about 17 - 18; the smallest was about 5, and the total was about 40 - 50 at present The characteristics of habitat and ecological environment of Francois' langur rely on evergreen broadleaved forest mainly natural spotted broadleaved forest The decrease of the population size and the reduction of distribution range were caused by factors including frequent human activities, broken habitat and changes of ecological environments, and possibly affected by reproductive isolation to a large extent