Home-range Use by a Large Horde of Wild <Emphasis Type="Italic">Mandrillus sphinx</Emphasis> |
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Authors: | Elizabeth C White Jean-Thoussaint Dikangadissi Edmond Dimoto William B Karesh Michael D Kock Nathacha Ona Abiaga Ruth Starkey Tharcisse Ukizintambara Lee J T White Katharine A Abernethy |
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Institution: | 1.Centre for Ecology and Conservation,University of Exeter,Cornwall,UK;2.SEGC Lopé,Centre International de Recherches Médicales de Franceville,Franceville,Gabon;3.Wildlife Conservation Society,New York,USA;4.Direction de la Faune et Chasse,Ministère des Eaux et Forêts,Libreville,Gabon;5.University of Antioch New England,Keene,USA;6.School of Biological and Environmental Sciences,University of Stirling,Stirling,UK |
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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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