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.
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- 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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- Springer US
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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