![]() ![]() Competition for meat between chimpanzees and baboons of the Gombe National Park. New data on meat-eating by wild chimpanzees. Primates preying upon vertebrates: new records from West Africa. Animal foods in the diets of wild chimpanzees ( Pan troglodytes): why cross-cultural variation? J. McCown (eds.), Benjamin/Cummings, Menlo Park, pp. Evolutionary implications of sex differences in chimpanzee predation and tool use. The chimpanzee of Filabanga, Western Tanzania. Comparative Ecology of Gorilla gorilla ( Savage & Wyman) and Pan troglodytes ( Blumenbach) in Rio Muni, West Africa. (1) Ecological studies in the rainy season, 1963–1964. Chimpanzees in Kasakati Basin, Tanganyika. Unit-groups of chimpanzees and their nomadism in the savannah woodland. Alimentation et activité d'un groupe de chimpanzés reintroduits en forêt gabonaise. New evidence on scavenging behavior in wild chimpanzees. The Chimpanzees of Gombe: Patterns of Behavior. ![]() The behavior of free-living chimpanzees in the Gombe Stream Reserve. Feeding behavior of chimpanzees: a preliminary report. ![]() The Chimpanzees of Kibale Forest: A Field Study of Ecology and Social Structure. Sur la présence du chimpanzé dans les limites du Parc National du Niokola-Koba (Sénégal). Contribution a l'étude du chimpanzé en Republique de Guinée. A survey of forest composition in the Gombe National Park, Tanzania. of Cambridge, Cambridge.Ĭlutton-Brock, T. Feeding and ranging behavior of the red colobus monkey. Vertebrate predation by primates: a review of hunting patterns and prey. Chimpanzee predation as a possible factor in the evolution of red colobus monkey social organization. Hunting behavior of wild chimpanzees in the Tai National Park. ![]() Progress report of the survey of chimpanzees in their natural habitat: Kabogo Point area, Tanganyika. Chimpanzees of Sapo Forest, Liberia: density, nests, tools and meat-eating. Present data suggest that chimpanzees in Gombe and Tai National Park, Ivory Coast, prey on mammals at rates higher than other populations.Īlbrecht, H. This suggests that adult males consumed around 25 kg of meat per year, although any average figure undoubtedly masks considerable individual variation. The amount of food provided by predation is estimated to have averaged 600 kg per year for chimpanzees in the two communities (totalling 14–17 adult or subadult males, 18–20 adult of subadult females, and about 19 infants or juveniles). Predation on bushpig and bushbuck also appears to have been high in relation to population density. In relation to encounter rates and population density, baboons, blue monkeys, and redtail monkeys were killed at a fraction of the rate of red colobus monkeys, which suffered severe mortality from chimpanzee predation. Predation rates varied greatly on different prey species, and were not related to either the proportion of time spent within 200 m of male chimpanzees, or to their population densities. Red colobus were the most frequent prey, followed by bushpig and bushbuck. In an average year the 15 adult and subadult male chimpanzees are calculated to have killed 204 prey per year in an area of 16 km 2, varying between 99 and 420 prey per year in periods of low and high predation rate. However, predation rates varied over time, increasing by four times between the first three and last four seasons of the sample period. In contrast to results from Mahale Mountains, there was no difference in predation rate between wet and dry seasons. For males, the mean rate of killing during the study period was 0.31 kills per male per 100 hr ( N=17 males), or 4.65 kills per 100 hr in the two communities. The rate of predation by females was too low to allow reasonable estimates. The chimpanzees were members of two study communities (Kanyawara, or Northern, and Kahama, or Southern, community), and were observed as focal individuals for 14,583 hr by more than 30 researchers and field assistants working in pairs. Rates of chimpanzee predation on mammals are calculated using data on 75 kills recorded during focal observation in Gombe National Park, Tanzania, from January 1972 to April 1975. ![]()
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