Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/1217
Appears in Collections:Psychology Journal Articles
Peer Review Status: Refereed
Title: Survey of Grauer's gorillas (Gorilla gorilla graueri) and eastern chimpanzees (Pan troglodytes schweinfurthi) in the Kahuzi-Biega National Park lowland sector and adjacent forest in eastern Democratic Republic of Congo
Authors: Hall, Jefferson S
White, Lee
Inogwabini, Bila-Isia
Omari, Ilambu
Morland, Hilary
Williamson, Elizabeth A
Saltonstall, Kristin
Walsh, Peter
Sikubwabo, Claude
Dumbo, Bonny
Kiswele, Kaleme Prince
Vedder, Amy
Freeman, Kathy
Contact Email: e.a.williamson@stir.ac.uk
Keywords: Grauer's gorilla
chimpanzee
survey
conservation
Democratic Republic of Congo
Issue Date: Apr-1998
Publisher: Springer / the International Primatological Society
Citation: Hall JS, White L, Inogwabini B, Omari I, Morland H, Williamson EA, Saltonstall K, Walsh P, Sikubwabo C, Dumbo B, Kiswele KP, Vedder A & Freeman K (1998) Survey of Grauer's gorillas (Gorilla gorilla graueri) and eastern chimpanzees (Pan troglodytes schweinfurthi) in the Kahuzi-Biega National Park lowland sector and adjacent forest in eastern Democratic Republic of Congo, International Journal of Primatology, 19 (2), pp. 207-235.
Abstract: We describe the distribution and estimate densities of Grauer's gorillas (Gorilla gorilla graueri) and eastern chimpanzees (Pan troglodytes schweinfurthi) in a 12,770-km2 area of lowland forest between the Lowa, Luka, Lugulu, and Oku rivers in eastern Democratic Republic of Congo, the site of the largest continuous population of Grauer's gorillas. The survey included a total of 480 km of transects completed within seven sampling zones in the Kahuzi-Biega National Park lowland sector and adjacent Kasese region and approximately 1100 km of footpath and forest reconnaissance. We estimate total populations of 7670 (4180-10,830) weaned gorillas within the Kahuzi-Biega lowland sector and 3350 (1420-5950) individuals in the Kasese survey areas. Within the same area, we estimate a population of 2600 (1620-4500) chimpanzees. Ape nestsite densities are significantly higher within the Kahuzi-Biega lowland sector than in the more remote Kasese survey area in spite of a significantly higher encounter rate of human sign within the lowland sector of the park. Comparison of our data with information obtained by Emlen and Schaller during the first rangewide survey of Grauer's gorillas in 1959 suggests that gorilla populations have remained stable in protected areas but declined in adjacent forest. These findings underscore the key role played by national parks in protecting biological resources in spite of the recent political and economic turmoil in the region. We also show that forest reconnaissance is a reliable and cost-effective method to assess gorilla densities in remote forested areas.
Type: Journal Article
URI: http://hdl.handle.net/1893/1217
DOI Link: http://dx.doi.org/10.1023/A:1020375430965
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author; you can only request a copy if you wish to use this work for your own research or private study.
Affiliation: University of Stirling
Biological and Environmental Sciences
Wildlife Conservation Society (Africa Program)
Institut Zairois pour la Conservation de la Nature
Wildlife Conservation Society (North America Program)
Psychology
Yale University
American Museum of Natural History
Institut Zairois pour la Conservation de la Nature
Centre de Recherche des Sciences Naturelles
Centre de Recherche des Sciences Naturelles
Wildlife Conservation Society (North America Program)
Wildlife Conservation Society (North America Program)

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