. 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. Figure 1. Location of the study area. Dashed line indicates ap- proximate limits of Tertiary and Quaternary marine sediments. Small black triangle marks location of Elf-Serepca core sample cited in text. "X" marks location of study site. Sanaga River is northern limit of C. satanas distribution in this region. (Figure 1) at the northern edge of this monkey's range (Dorst
. 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. Figure 1. Location of the study area. Dashed line indicates ap- proximate limits of Tertiary and Quaternary marine sediments. Small black triangle marks location of Elf-Serepca core sample cited in text. "X" marks location of study site. Sanaga River is northern limit of C. satanas distribution in this region. (Figure 1) at the northern edge of this monkey's range (Dorst and Dandelot, 1970). Here I will sum- marize briefly some of my preliminary findings on the feeding behavior of this monkey and point out some striking differences in its feeding behavior from that of 2 Colobus species studied in another African rain forest, Kibale Forest in western Uganda (Struhsaker and Oates, 1975). The two Ugandan species are the black and white colobus, C. guereza, and the red colobus, C. badius. The discussion centers on hy- potheses designed to answer the following questions: Why do black colobus spend much less of their feeding time eating leaves than do either of the Ugandan Colobus? Why do black colobus avoid the leaves of almost all the common trees of the study area, although they spend about 35 percent of their feeding time eating leaves? Why do black colobus feed heavily, in all months, on seeds? My working hypothesis is that differences in the overall levels of toxic secondary compounds in the vegetation of these 2 sites have led to (1) differences in the degree to which these monkeys feed on leaves, (2) other differences in feeding and ranging behavior, and (3) differences in population density of Colobus between the 2 sites. Differences between sites in toxic- compound content of the vegetation seem to be ultimately related to gross differences in soil quality between the 2 sites (cf. Janzen, 1974). General Features of Feeding and Ranging Beha
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Keywords: ., bookcentury1900, bookcolle, booksubjectleaves, booksubjectmammals
