. The Ecology of arboreal folivores : a symposium held at the Conservation and Research Center, National Zoological Park, Smithsonian Institution, May 29-31, 1975 . Figure 1. Distribution of feeding observations for Presbytis mel- alophos and Presbytis obscura in different structural levels at the Krau Game Reserve, Pahang, Malaysia. The distribution of feeding observations for the 2 species in the Krau Game Reserve is presented in Figure 1. To prevent biases due to observer presence, only first sightings have been included. Sightings of P. obscura were primarily in the main canopy and to a le
. The Ecology of arboreal folivores : a symposium held at the Conservation and Research Center, National Zoological Park, Smithsonian Institution, May 29-31, 1975 . Figure 1. Distribution of feeding observations for Presbytis mel- alophos and Presbytis obscura in different structural levels at the Krau Game Reserve, Pahang, Malaysia. The distribution of feeding observations for the 2 species in the Krau Game Reserve is presented in Figure 1. To prevent biases due to observer presence, only first sightings have been included. Sightings of P. obscura were primarily in the main canopy and to a lesser extent in the emergents. P. melalophos ranges throughout all levels, but spends more time foraging in the understory than does P. obscura. Observations in other localities indicate a similar pattern. The locomotor and postural differences described below can be interpreted as adaptations to utilization of these different structural levels. Locomotor behavior The locomotor activities of the 2 leaf-monkeys can be divided into 4 categories on the basis of limb usage: quadrupedal walking and running (Figure 2) con- tinuous, usually horizontal progression using 4 limbs in alternating regular, or nearly regular sequences. leaping (Figure 3) progression between discontin- uous supports using rapid extension of the hind- limbs for propulsion. Landing usually involves both arms and legs. A series of consecutive leaps is de- scribed as hopping (Figure 4). Locomotion in Two Malaysian Leaf-monkeys 245
Size: 1382px × 3617px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcolle, booksubjectleaves, booksubjectmammals
