Fifteen species of plants, including Ficus concinna (Miq.)
Miq., Cuscuta chinensis Lam., and Boniodendron minus(Hemsl.) T. C. Chen, were consumed in large quantities throughout the
year, accounting for 61.29% of the total records and being the main
food of François’ langur. Eight species of plants, includingTaxillus sutchuenensis (Lecomte) Danser, Henslowia
frutescens Benth., and Apodytes dimidiate E.Mey. ex Arn.,
contributed to a relatively high proportion of the annual feeding
records (more than 1%) but were only consumed by the langurs for a few
months. For the parasitic vines, the proportion of the annual foraging
records was relatively high (1.68%), especially in January, accounting
for up to 12.93% of the monthly foraging records. In addition, plants,
such as Ligustrum lucidum W. T. Aiton and Cinnamomum
burmanni (Nees & T.Nees) Blume, were only sporadically recorded
throughout the year and were often rare.
There was no significant
correlation between the consumption of the food species and the mature
leaves, flowers, and abundance of mature leaves and flowers (mature
leaves: β = 0.03, Wip = 0.68; flowers: β = -0.102, Wip = 1.00; FAI of
mature leaves: β = 2.52, Wip = 1.00; FAI of fruits: β= -0.28, Wip =
1.00), and there was no significant correlation between the consumption
of food species and the dietary composition and ecological factors
(Table 3). There was also no significant correlation between the dietary
diversity and the mature leaves (mature leaves: β = 0.02, Wip = 0.52),
and there was no significant correlation between the consumption of the
food species and the dietary composition and ecological factors (Table
3).