Abstract
The predicted relationship between home-range size and group mass in primates developed by Clutton-Brock and Harvey (1977) has proved extremely robust in describing the use of space by most primate species. However, mandrills (Mandrillus sphinx) are now known to have an extreme group mass in the wild, far larger than that of the species used originally to generate that relationship, and so it was unknown whether this relationship would be robust for this species. We investigated the home-range size and use of a wild horde of ca. 700 mandrills in Lopé National Park, Gabon, using radiotelemetry. The total area the horde used over a 6-yr period [100% minimum convex polygon (MCP)] was 182 km2, including 89 km2 of suitable forest habitat. Mandrills used gallery forests and isolated forest fragments with high botanical diversity far more intensively that the continuous forest and completely avoided savanna and marsh. Peeled polygons and fixed kernel contours revealed multiple centres of use, with the horde spending more than half its time in <10% of the total documented range, typical of a frugivore using a patchy environment. Home-range size and internal structure varied considerably between years, but total home range fitted the predicted relationship between group mass and home range size, despite being an outlier to the dataset. We discuss the conservation implications of the species’ space requirements, in light of current pressures on land use in their range.
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Acknowledgments
We thank the Ministère des Eaux et Forêts and the Agence National des Parcs Nationaux (ANPN, formerly CNPN) for permission to work in Lopé National Park. In particular, we thank the late Dr. Alphonse Mackanga-Missandzou, M. Simon Angoué and M. Jean Tondangoye, and M. Augustin Mihindou for support at Lopé as Chefs de Brigade de Faune 1998–2002, and from 2003, M. Joseph Ngowou as National Park conservator. We thank the Centre International de Recherches Médicales de Franceville (CIRMF) for long-term core funding of SEGC, from where the study was carried out, and for support to K. Abernethy. The Wildlife Conservation Society Field Veterinary Program (1998–2003) provided support to W. B. Karesh and M. D. Kock, and Edith McBean and the Disney Foundation (1998–2000) provided project grants to K. Abernethy and L. White via the WCS Africa Program. The Welcome Trust provided support to T. Ukizintambara and the Natural Environment Research Council (NERC), U.K. provided studentship (NER/S/A/2002/12024) and fieldwork expenses grant to E. C. White, via the University of Stirling. We thank ECOFAC II (Gabon) and WCS Gabon for logistical support in the field, and Martial Bouassa, Jean-Gael Emptaz-Collomb, Tom Gilbert, Philipp Henschel, Olivier Houé, Miguel Léal, Ludovic Momont, Jules Penze, Peter Ragg, Trish Reed, Paul Telfer, Caroline Tutin, Peter Walsh, and E. Jean Wickings for their assistance in the field, in particular capturing mandrills for radio-collaring. We also thank David Bryant and 2 anonymous reviewers for useful comments and suggestions on the manuscript.
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White, E.C., Dikangadissi, JT., Dimoto, E. et al. Home-range Use by a Large Horde of Wild Mandrillus sphinx . Int J Primatol 31, 627–645 (2010). https://doi.org/10.1007/s10764-010-9417-3
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DOI: https://doi.org/10.1007/s10764-010-9417-3