The Distribution, Status, and Conservation Outlook of the Drill (Mandrillus leucophaeus) in Cameroon
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The populations of many endangered species are becoming increasingly fragmented, and accurate, current information on the status of these subpopulations is essential for the design of effective conservation strategies within a human-dominated landscape. The drill (Mandrillus leucophaeus) is one of the most spectacular and endangered primates in Africa, yet up-to-date information on its distribution, population status, and conservation outlook is lacking. Cameroon has been estimated to encompass 80 % of the species’ range. We examined the distribution, population status, and conservation outlook for the drill throughout its historic range in Cameroon. To do this, we divided the historic range of the drill in Cameroon (46,000 km2) into 52 survey units along natural and manmade boundary features. Based on a series of field surveys in 2002–2009, village interviews, analysis of geospatial data, and bibliographical research, we assigned each survey unit a rank of 0–4 for 15 parameters indicative of current situation for drills, habitat suitability, and conservation outlook. We obtained direct evidence for the presence of drills in 16 of the 52 survey units, with those of Ejagham, Korup, Ebo, and Nta Ali receiving the highest index scores. We warn of local extirpations and increased isolation among drill populations due to loss of dispersal corridors, e.g., Douala Edea survey unit. In some cases drills persist in forest fragments within human-dominated landscapes, e.g., Kupe-Manenguba, but the species’ future is probably dependent on effective wildlife management in a handful of isolated strongholds where probability of long-term protection is higher, particularly in Korup National Park, Takamanda National Park, and the proposed Ebo National Park. Pressure from current and proposed large-scale commercial plantations, oil prospecting, logging, and the continual human population growth in this region means that a concerted conservation effort will be needed to safeguard the remaining drill habitat if the species is to survive in Cameroon.
- Astaras, C. (2009). Ecology and status of the drill (Mandrillus leucophaeus) in Korup National Park: Implications for conservation. Ph.D. thesis, Georg-August-Universität Göttingen, Göttingen, Germany. Available at http://www.optimus-verlag.de/
- Brashares, J. S., Golden, C. D., Weinbaum, K. Z., Barrett, C. B., & Okello, G. V. (2011). Economic and geographic drivers of wildlife consumption in rural Africa. PNAS, 108(34), 13931–13936. CrossRef
- Center for International Earth Science Information Network (CIESIN), Columbia University; International Food Policy Research Institute (IFPRI); The World Bank; and Centro Internacional de Agricultura Tropical (CIAT). (2004). Global Rural-Urban Mapping Project, Version 1 (GRUMPv1): Population Density Grid. Palisades, NY: Socioeconomic Data and Applications Center (SEDAC), Columbia University. Available at http://sedac.ciesin.columbia.edu/gpw (Accessed October 5, 2011).
- Fa, J., Garcia Yuste, J. E., & Castelo, R. (2000). Bushmeat markets on Bioko Island as a measure of hunting pressure. Conservation Biology, 14, 1602–1613. CrossRef
- Fa, J. E., Peres, C. A., & Meuuwig, J. (2002). Bushmeat exploitation in tropical forests: an intercontinental comparison. Conservation Biology, 16, 232–241. CrossRef
- Fa, J. E., Seymour, S., Dupain, J., Amin, R., Albrechtsen, L., & Macdonald, D. (2006). Getting to grips with the magnitude of exploitation: bushmeat in the Cross-Sanaga rivers region, Nigeria and Cameroon. Biological Conservation, 129, 497–510. CrossRef
- Gadsby, E. L. (1992). Drill survey in Cameroon. Oryx, 26(3), 177–178.
- Gadsby, E. L., & Jenkins Jr., P. D. (1997–1998). The drill-integrated in situ and ex situ conservation. African Primates, 3(1–2), 12–18.
- Gartlan, J. S. (1970). Preliminary notes on the ecology and behavior of the drill, Mandrillus leucophaeus Ritgen, 1824. In J. R. Napier & P. H. Napier (Eds.), Old world monkeys (pp. 445–480). New York: Academic Press.
- Grubb, P. (1973). Distribution, divergence and speciation of the drill and mandrill. Folia Primatologica, 20, 161–177. CrossRef
- Hearn, G. W., & Berghaier, R. W. (1996). Census of diurnal primate groups in the Gran Caldera Volcanica de Luba, Bioko Island, Equatorial Guinea: January, 1996. Report to the Government of Equatorial Guinea.
- Hearn, G., & Morra, W. (2001). The approaching extinction of monkeys and duikers on Bioko Island, Equatorial Guinea, Africa. Publication no. 7. Glenside: Arcadia University, Bioko Biodiversity Protection Program.
- IEA. (1998). Mandrillus leucophaeus. In African mammals databank: A databank for the conservation and management of the African mammals. Institute of Applied Ecology. Available at: www.gisbau.uniroma1.it/amd/index.htm
- Macdonald, D. W., Johnson, P. J., Albrechtsen, L., Seymour, S., Dupain, J., Hall, A., & et al. (2011). Bushmeat trade in the Cross-Sanaga rivers region: evidence for the importance of protected areas. Biological Conservation. Available at: http://dx.doi.org/10.1016/j.biocon.2011.12.018
- Maley, J. (1991). The African rain forest vegetation and palaeoenvironments during late quaternary. Climatic Change, 19, 79–98. CrossRef
- Maley, J., & Brenac, P. (1998). Vegetation dynamics, paleoenvironments and climatic changes in the forest of western Cameroon during the last 28,000 years B.P. Review of Paleobotany and Palynology, 99, 157–187. CrossRef
- Morgan, D., & Sanz, C. (2007). Best practice guidelines for reducing the impact of commercial logging on great apes in western Equatorial Africa. Gland: IUCN/SSC Primate Specialist Group. CrossRef
- Morgan, B. J., Adeleke, A., Bassey, T., Bergl, R., Dunn, A., Fotso, R., et al. (2011). Regional action plan for the conservation of the Nigeria–Cameroon chimpanzee (Pan troglodytes ellioti). Escondido: IUCN/SSC Primate Specialist Group and Zoological Society of San Diego.
- Oates, J. F. (1996). African primates: Status survey and conservation action plan, revised edition. Gland: IUCN/SSC Primate Specialist Group. CrossRef
- Oates, J. F., & Butynski, T. M. (2008). Mandrillus leucophaeus. In IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. Available at: www.iucnredlist.org (Accessed December 18. 2011).
- Oates, J. F., Bergl, R. A., & Linder, J. M. (2004). Biodiversity and conservation in the Gulf of Guinea. Advances in Applied Biodiversity Science, no. 6. Washington, DC: Conservation International Center for Applied Biodiversity Science Press.
- Olson, D. M., Dinerstein, E., Wikramanayake, E. D., Burgess, N. D., Powell, G. V. N., Underwood, E. C., et al. (2001). Terrestrial ecoregions of the world: a new map of life on earth. Bioscience, 51(11), 933–938. CrossRef
- Ting, N., Astaras, C., Hearn, G., Honarvar, S., Corush, J., Burrell, A. S., et al. (2012). Genetic signatures of a demographic collapse in a large-bodied forest dwelling primate (Mandrillus leucophaeus). Ecology and Evolution, 2(3), 550–561. CrossRef
- Wild, C., Morgan, B. J., & Dixson, A. (2005). Conservation of drill populations in Bakossiland, Cameroon: historical trends and current status. International Journal of Primatology, 26(4), 759–773. CrossRef
- The Distribution, Status, and Conservation Outlook of the Drill (Mandrillus leucophaeus) in Cameroon
International Journal of Primatology
Volume 34, Issue 2 , pp 281-302
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- Mandrillus leucophaeus
- Rain forest
- Author Affiliations
- 1. Institute for Conservation Research, Zoological Society of San Diego, Escondido, CA, 92025, USA
- 2. School of Natural Sciences, University of Stirling, FK9 4LA, Stirling, Scotland
- 3. Ebo Forest Research Project, BP3055, Messa, Cameroon
- 4. School of Biological Sciences, Victoria University of Wellington, Wellington, 6012, New Zealand
- 5. Centre for Nature Conservation, Department of Conservation Biology, Georg-August-Universität Göttingen, 37075, Göttingen, Germany
- 6. Wildlife Conservation Research Unit, Recanati-Kaplan Centre, Department of Zoology, University of Oxford, Tubney, OX13 5QL, UK