关键词: 黑叶猴, 昼夜活动节律, 日活动时间分配

Abstract: We studied activity patterns and time budgets of a group of François langurs (Trachypithecus françoisi) in Fusui Nature Reserve, Guangxi, August 2002 - July 2003. These langurs live in karst formations completely surrounded by cultivated land. We used focal group sampling, during 10 consecutive days each month. We identified 8 activity categories during the March - October period and 9 during the November - February period. Resting, moving and feeding occurred most often, and sun-bathing only occurred between November and February. Resting constituted the largest proportion of daily time budgets, followed by feeding, moving, sunbathing and grooming. Daily time budgets displayed significant monthly variation. Daily time budgets were correlated with mean daily highest temperature, mean lowest temperature, food abundance and sunlight intensity. Activity patterns and time budgets of these langurs were similar to those of other folivorous primates.

Key words: Activity rhythm, Diurnal time budget, Franç, ois langur (Trachypithecus franç, oisi)