William Olupot

Learn More
Two opposing hypotheses concerning determinants of mangabey (Cercocebus albigena) ranging patterns have been advocated. One hypothesis suggests that ranging patterns of mangabeys are largely a response to fruit availability, while the other hypothesis advocates that concerns of fruit availability are supplemented or overridden by concerns of fecal(More)
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(More)
We studied factors influencing intergroup transfer in male mangabeys (Lophocebus albigena) inhabiting 7 social groups in Kibale National Park over a 2-year period. The sample consisted of 40 males including 36 that we captured and marked during the study. Intergroup transfers are movements between groups that culminate in either long-term (dispersal) or(More)
We investigated long-term site fidelity of gray-cheeked mangabey (Lophocebus albigena) groups in Kibale National Park, Uganda. Concurrently, we monitored shifts in home range by individual females and subadult and adult males. We documented home range stability by calculating the area of overlap in successive years, and by recording the drift of each(More)
Frugivorous forest primates face a continual challenge to locate ripe fruit due to the poor visibility characterizing a heavily vegetated habitat and the spatial and temporal unpredictability of their fruit sources. We present two hypotheses regarding fruit finding in gray-cheeked mangabeys (Lophocebus albigena). The first hypothesis is that mangabeys(More)
Among social vertebrates, immigrants may incur a substantial fitness cost when they attempt to join a new group. Dispersers could reduce that cost, or increase their probability of mating via coalition formation, by immigrating into groups containing first- or second-degree relatives. We here examine whether dispersing males tend to move into groups(More)
Harvesting of wild plants for nontimber uses is widespread in the tropics, but its impact is usually quantified only for one or a few species at a time. Thus, forest managers are never clear about how well their efforts are protecting such plants. We quantified abundance and edge-related variation in 91 species of useful wild plants commonly harvested by(More)
WILLIAM OLUPOT 1 , 2 ∗, ROBERT B ARIGYIRA 1 AND COLIN A. CHAPMAN 3 , 4 1Institute of Tropical Forest Conservation, PO Box 44, Kabale, Uganda 2Wildlife Conservation Society (Uganda Program), Plot 802, Mitala, Kiwafu Road, Kansanga, PO Box 7487, Kampala, Uganda 3Department of Anthropology and McGill School of Environment, 855 Sherbrooke Street West, McGill(More)
Human modification of ecosystems is threatening biodiversity on a global scale (Whitmore 1997; W. F.Laurance 1999; Nepstad et aL 1999b; Chapman and Peres 2001). This is illustrated by the fact that an estimated 65.1 million hectares of forest were destroyed between 1990 and 1995 (FAa 1999). Many other areas are affected by forest degradation that involves(More)
  • 1