关键词: 黑叶猴, 喀斯特石山生境, 觅食活动, 季节性

Abstract: To explore the influence of habitat fragmentation on the ecology of the François langur (Trachypithecus francoisi), data on habitat use were collected from a group of François langurs living in an isolated hill in the Fusui Rare Animal Nature Reserve,Guangxi Province,between August 2002 and July 2003. Our results indicated that there was significant variation in the distribution of feeding activity in different vertical hill zones They showed preference for feeding in the middle zone. The top zone,as well as the bottom zone were used less for feeding. Langurs' feeding activities were concentrated in six patches,with a total area of 7.94 ha,which occupied 18.9% of the habitat. The densities of langurs' preferred food plants in the feeding patches were higher than that in the non-feeding patches. Langurs' diet varied according to season, even though leaves contributed a large proportion of the diet. This diet shift corresponded to seasonal variations in the utilization of feeding patches.

Key words: Franç, ois langur (Trachypithecus francoisi), Karst habitat, Feeding activity, Seasonality