We compared parasitic infection in a crop-raiding and a wild-foraging troop of olive baboons, Papio anubis, in Gashaka Gumti National Park, Nigeria, to quantify how crop raiding may have influenced primate-parasite interactions. We recovered gastrointestinal parasites from fecal samples from all adult individuals in both troops and processed them via formal-ether sedimentation. We compared parasitic species richness, prevalence, output, and load across troops. We recovered 9 parasite taxa. The wild-foraging troop had a significantly higher mean output than the crop-raiding troop for Physaloptera sp., Trichuris sp., and also a significantly higher total helminth load. The crop-raiding troop had a significantly higher mean output for the protozoan Balantidium coli and also showed a higher parasitic species richness, with 9 species recovered compared to the 7 recorded for the wild-foraging individuals. The changes in nutritional intake, behavior, and human proximity caused by crop raiding may have important epidemiological impacts on wild primate populations, and the nature of such impacts may vary across different taxa of parasites.
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ACKNOWLEDGMENTS
We thank the Nigerian authorities; the National Parks Service of Nigeria, through the Conservator General Alhaji Lawan B. Marguba; and the staff and management of Gashaka Gumti National Park and NCF/WWF-UK for their support. Many people, including our field assistants, Bobbo Buba and Nuhu, assisted with the field work. We thank Volker Sommer (UCL) for help and support through the Gashaka Primate Project and James Higham for invaluable assistance in the field. We thank John Williams and Claire Rogers of the London School of Hygiene and Tropical Medicine for training in parasitological analysis. Without the support and expertise of all of these people, the project would not have been possible. We also thank Dr. Colin Chapman and 2 anonymous reviewers for their constructive criticism of the article. Grants from The Leakey Trust, the North of England Zoological Society, and Roehampton University partially funded the project.
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Weyher, A.H., Ross, C. & Semple, S. Gastrointestinal Parasites in Crop Raiding and Wild Foraging Papio anubis in Nigeria. Int J Primatol 27, 1519–1534 (2006). https://doi.org/10.1007/s10764-006-9089-1
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DOI: https://doi.org/10.1007/s10764-006-9089-1