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Distribution, abundance and conservation status of Grauer's gorilla

Published online by Cambridge University Press:  24 April 2009

Jefferson S. Hall ,
Kristin Saltonstall ,
Bila-Lsia Inogwabini  and
Ilambu Omari
Jefferson S. Hall*
Affiliation:
Wildlife Conservation Society, International Conservation, 185th Street and Southern Blvd., Bronx, NY 10460, USA.
Kristin Saltonstall
Affiliation:
Kristin Saltonstall, Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT 06520, USA.
Bila-Lsia Inogwabini
Affiliation:
Bila-Isia Inogwabini, Wildlife Conservation Society, International Conservation, 185th Street and Southern Blvd., Bronx, NY 10460, USA.
Ilambu Omari
Affiliation:
Ilambu Omari, Institut Congolais pour la Conservation de la Nature, Kinshasa, Democratic Republic of Congo.
*
School of Forestry and Environmental Studies, Yale University, 360 Prospect Street, New Haven, CT 06511, USA; Email: [email protected]
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Abstract

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This report updates the distribution and provides abundance estimates for Grauer's gorilla Gorilla gorilla graueri across its 90,000-sq-km range. The authors divide the range of Grauer's gorilla into four regions within which they identify 11 populations and estimate a total of c. 16,900 individuals. Gorillas found in the Kahuzi-Biega lowland-Kasese region represent 86 per cent of the subspecies's total population. Further, approximately 67 per cent of known Grauer's gorillas inhabit Kahuzi-Biega, Maiko and Virunga National Parks. The eastern region of the Democratic Republic of Congo (formerly Zaire) has an extremely high human population growth rate indicating that deforestation and wildlife use trends will continue to increase. Thus, in spite of the encouraging results of surveys to identify populations and characterize abundance, no Grauer's gorilla population should be considered safe from extirpation.

Type
Research Article
Information
Oryx , Volume 32 , Issue 2 , April 1998 , pp. 122 - 130
Copyright
Copyright © Fauna and Flora International 1998

References

Barnes, R.F.W. 1990. Deforestation trends in tropical Africa. African Journal of Ecology, 28, 161–173.CrossRefGoogle Scholar
Butynski, T. and Sarmiento, E. 1995. Gorilla census on Mt Tshiaberimu: preliminary report. Gorilla Journal, 1, 11.Google Scholar
Carroll, R.W. 1988. Relative density, range extension, and conservation potential of lowland gorilla (Gorilla gorilla gorilla) in the Dzanga-Sangha region of southwestern Central African Republic. Mammalia, 52, 309–323.CrossRefGoogle Scholar
Emlen, J.T. and Schaller, G.B. 1960. Distribution and status of the mountain gorilla (Gorilla gorilla beringei)– 1959. Zoologica, 45, 41–52.Google Scholar
Fay, J.M. 1989. Partial completion of a census of the lowland gorilla (Gorilla g. gorilla (Savage and Wayman)) in southwestern Central African Republic. Mammalia, 53, 203–215.Google Scholar
Fay, J.M., and Agnagna, M. 1992. Census of gorillas in northern Republic of Congo. American Journal of Primatology, 27, 275–284.CrossRefGoogle ScholarPubMed
Gaeverts, H. and Colyn, M. 1986. Analyse craniométrique des populations de Gorilla gorilla graueri (Primates) de la rivière Lowa et comparison avec d'autres populations du bloc forestier centre-africaine. Annales de la Faculté des Sciences, Universitè de Kisangani, 27–30.Google Scholar
Goodall, A.G. 1980. Pilot survey for conservation management of eastern gorillas in Zaire. Final Report. IUCN/WWF Project 1731.Google Scholar
Groom, A.F. 1973. Squeezing out the mountain gorilla. Oryx, 12, 207–215.CrossRefGoogle Scholar
Hall, J. and Wathaut, W.M. 1992. A preliminary survey of the eastern lowland gorilla. Wildlife Conservation Society, New York.Google Scholar
Hall, J.S., White, L.J.T., Inogwabini, B.I. et al. In press. A survey of Grauer's gorillas (Gorilla gorilla graueri) and chimpanzees (Pan troglodytes schweinfurthi) in the Kahuzi-Biega National Park lowland sector and adjacent forest in eastern Zaire. v International Journal of Primatology.Google Scholar
Harcourt, A.H. 1996. Is the gorilla a threatened species? How should we judge? Biological Conservation, 75, 165–176.CrossRefGoogle Scholar
Harcourt, A.H. and Groom, A.F.G. 1972. Gorilla census. Oryx, 28, 59–70.Google Scholar
Harcourt, A.H., Fossey, D. and Sabater-Pi, J. 1981. Demography of Gorilla gorilla. Journal of Zoological Society of London, 195, 215–233.CrossRefGoogle Scholar
Hart, J.A. and Hall, J.S. 1996. Status of eastern Zaire's forest parks and reserves. Conservation Biology, 10, 316–324.Google Scholar
Hart, J.A. and Sikubwabo, C. 1994. Exploration of the Maiko National Park of Zaire 1989–1992: History, environment and the distribution and status of large mammals. Wildlife Conservation Society, New York.Google Scholar
Institut National de la Statistique. 1984. Recensement scientifique de la population 1984: projections demographiques Zaire et regions, 1984–2000. Ministere du Plan et Amenagement du Territoire, Kinshasa.Google Scholar
Mbake, S. 1995. The Kahuzi-Biega National Park and the IZCN/GTZ project. Gorilla Journal, 1, 12–13.Google Scholar
Murnyak, D.F. 1981. Censusing the gorillas in Kahuzi-Biega National Park. Biological Conservation, 21, 163–176.CrossRefGoogle Scholar
Mwanza, N., Maruhashi, T., Yumoto, T. and Yamagiwa, J. 1988. Conservation of eastern lowland gorillas in the Masisi region, Zaire. Primate Conservation, 9, 111–114.Google Scholar
Oates, J. 1996. Habitat alteration, hunting and the conservation of folivorous primates in Africa. Australian Journal of Ecology, 21, 1–9.Google Scholar
Refisch, J. 1991. Presence des grands mammiferes dans le Parc National de Kahuzi-Biega et l'influence humaine sur les populations des animaux. Rapport dans le cadre du Projet IZCN/GTZ - Conservation de la Nature Intégrée, l'Est Zaire.Google Scholar
Saltonstall, K., Amato, G. and Powell, J. In press. Mitochondrial DNA variability in Grauer's gorillas of Kahuzi-Biega National Park. Journal of Heredity.Google Scholar
Schaller, G.B. 1963. The Mountain Gorilla, Ecology and Behavior. The University of Chicago Press, Chicago.Google Scholar
Schilter, C. and Doumenge, C. 1993. Programme Itombwe: rapport de mission, 19 juillet au 19 aout 1993. IZCN/UICN, Zaire.Google Scholar
Sikubwabo, C.K. 1993. Rapport de mission enquete faune-chase: programme Itombwe.IZCN/IUCN, Bukavu.Google Scholar
Steinhauer-Burkhart, B., Muhlenberg, M. and Slowik, J. 1995. Kahuzi-Biega National Park. IZCN/GTZ Project, Zaire.Google Scholar
Tutin, C. and Fernandez, M. 1984. Nationwide census of gorilla (Gorilla g. gorilla) and chimpanzee (Pan t. troglodytes) populations in Gabon. American Journal of Primatology, 6, 313–336.CrossRefGoogle Scholar
Vedder, A. 1996. Projet inventaire des gorilles et d'autres grands mammiferes de Vest du Zaire: secteur original du Pare National de Kahuzi-Biega. Institut Zairois pour la Conservation de la Nature/ © 1998 FFI, Wildlife Conservation Society.Google Scholar
Watts, D.P. 1991. Mountain gorilla reproduction and sexual behavior. American journal of Primatology, 24, 211–225.CrossRefGoogle ScholarPubMed
Weber, A.W. and Vedder, A. 1983. Population dynamics of the Virunga gorillas 1959–1978. Biological Conservation, 26, 341–366.CrossRefGoogle Scholar
Wils, W., Carael, M. and Tondeur, G. 1976. Le Kivu montagneux: surpopulation – sous nutrition – erosion du sol. Etude prospective par simulations mathematiques. CEMUBAC/IRS, Zaire.Google Scholar
Wilson, J.R. and Catsis, M. 1990. A preliminary survey of the forests of the ‘Itombwe’ mountains and the Kahuzi-Biega National Park extension, east Zaire, July–September 1989. Project Report for WWF Project 3902.Google Scholar
Yamagiwa, J. 1983. Diachronic changes in two eastern lowland gorilla groups (Gorilla gorilla graueri) in the Mt Kahuzi region, Zaire. Primates, 24, 174–183.CrossRefGoogle Scholar
Yamagiwa, J., Mwanza, N., Spangenberg, et al. 1993. A census of the eastern lowland gorillas Gorilla gorilla graueri in Kahuzi-Biega National Park with reference to mountain gorillas G. g. beringei in the Virunga Region, Zaire. Biological Conservation, 64, 83–89.Google Scholar