| patterns of male residency and intergroup transfer in gray-cheeked mangabeys (lophocebus albigena). | we describe the movements and fates of 36 collared gray-cheeked male mangabeys (lophocebus albigena) that resided in seven social groups in kibale national park, uganda. the male mangabeys were captured, radiotagged, and then contacted regularly over a period of up to 8 years. individuals varied considerably in how tightly they were associated with their groups. "central" males were usually found in close spatial association with their own groups, but they sometimes visited others. "peripheral" ... | 2005 | 16104031 |
| competition, predation, and the evolutionary significance of the cercopithecine cheek pouch: the case of cercopithecus and lophocebus. | reports of cercopithecine cheek pouch use and functional significance are largely anecdotal, and to date there have been no investigations into its use by species living in closed forest habitats. here, i report on cheek pouch use in cercopithecus ascanius and lophocebus albigena in the kibale national park, uganda, between july-october 1997. two hypotheses were evaluated: this feature was selected for because of its role in 1) increasing feeding efficiency via a reduction in potential feeding c ... | 2005 | 15386232 |
| primate abundance along five transect lines at ngogo, kibale national park, uganda. | using the line transect methods, i studied the primate density at ngogo, kibale national park, uganda for 18 months. comparisons with other studies show that the population of red colobus monkeys (procolobus rufomitratus) and blue monkeys (cercopithecus mitis) is declining, whereas the populations of black-and-white colobus (colobus guereza), red-tailed monkeys (cercopithecus ascanius), grey-cheeked mangabeys (lophocebus albigena), baboons (papio anubis), and chimpanzees (pan troglodytes) remain ... | 2007 | 17330309 |
| spatial distribution of primates in a mosaic of colonizing and old growth forest at ngogo, kibale national park, uganda. | primate censuses were conducted in a mosaic of colonizing (two locations) and old-growth forests using line transect methods at the ngogo study site, kibale national park, uganda. black and white colobus monkeys (colobus guereza) were encountered more frequently in the colonizing forests than in the old growth forest, while chimpanzees (pan troglodytes) were encountered more frequently in the old growth forest than in colonizing forests. although not significant, results suggest that blue monkey ... | 2006 | 16479411 |
| hardness of cercopithecine foods: implications for the critical function of enamel thickness in exploiting fallback foods. | we evaluate the hardness of foods consumed by sympatric cercopithecus ascanius (redtail guenons) and lophocebus albigena (grey-cheeked mangabeys), and consider how selection might operate to influence foraging adaptations. since l. albigena has among the thickest dental enamel in extant primates and is commonly referred to as a hard-object consumer, we predicted that their diet would be harder than that of the guenon. data on diet and food hardness (as measured by resistance to puncture and crus ... | 2004 | 15386250 |