Abstract:

Habitat selection of Francois' Langur (Trachypithecus francoisi francoisi)was studied by using Resource Selection Functions and Resource Selection Index in the Jinfo Mountain Natural Reserve from March to May of 2007. The results indicated that the key factors notably influencing habitat selection were canopy density, shrub size, human disturbance and distance of cave. Francois' Langurs preferred the tree-shrub forests in the area studied with higher canopy density(CA)(>0.5), higher density of tree and shrub ·(400 m²)^-1], greater shrub DBH(>8 cm), far from human disturbance (HD) (＞1 000 m), closer the cave and near water source (<250 m). Francois' Langurs preferred habitats with a southward aspect. Resource selection functions is a log-linear model: logit (P)=-21.964+2.126×DBH+2.108×CA+2.081×HD-1.829×DC. From this model, we can estimate a habitat selection probability: P=e^{logit (P)}/(1+e^logit(P)).

Key words: Francois' Langur (Trachypithecus francoisi francoisi), habitat selection, resource selection functions (RSFs), resource selection index