. The Ecology of arboreal folivores : a symposium held at the Conservation and Research Center, National Zoological Park, Smithsonian Institution, May 29-31, 1975. Folivores; Forest ecology; Leaves; Mammals; Mammals. Table 2.—Population Densities of 5 Species, 1970-71* Number of Groups Size Total Number Species of groups per km2 of groups population per km2 P. pygmaeus 6 11 H. muelleri 10 4 40 P. aygula 7 8 56 M. fascicularis 1 16 16 M. nemestrina 1 15 15 Based on an area of aries shown in Figure 2 is disregarding the additional a
. The Ecology of arboreal folivores : a symposium held at the Conservation and Research Center, National Zoological Park, Smithsonian Institution, May 29-31, 1975. Folivores; Forest ecology; Leaves; Mammals; Mammals. Table 2.—Population Densities of 5 Species, 1970-71* Number of Groups Size Total Number Species of groups per km2 of groups population per km2 P. pygmaeus 6 11 H. muelleri 10 4 40 P. aygula 7 8 56 M. fascicularis 1 16 16 M. nemestrina 1 15 15 Based on an area of aries shown in Figure 2 is disregarding the additional area due to slopes. It is, therefore, possible to calculate the density of each species relative to the study area, and the results are shown in Table 2. These densities represent maximum densities achieved when all groups are present within the boundaries of the study area. The average density of a species must be lower because some groups move across the bound- aries of the study area more or less frequently de- pending on ranging patterns. Patterns of distribution For the purpose of analysis of distributions, I have laid a grid of 4 hectare cells over the study area positioned so that the transects shown in Figure 3 pass through the centers of cells; the relationship be- tween the transects and the cells of this grid is shown in Figure 6. The area sampled by the transects is larger than the area encompassed by the boundaries of the study area since observers could locate animals outside the boundaries while walking along the bound- aries. Thus the area covered by the grid extends 100 meters outside the transects. In addition, contacts were made more than 100 meters outside the bound- aries when observers tracked animals to the east of study area, and the cells in which such contacts were made are indicated by dotted lines in Figure 6. Finally, the arrangement of the grid of cells leaves some parts of the study area along the Sengata River that fall in cells covering primari
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