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- The study on which this article is based was undertaken within the Department of Wildlife and National Parks, Botswana. Financial support was provided by the Commission of the European Communities, and the United States Agency for International Development. Administrative support came from FGU Consulting and Engineering and the Academy for Educational Development. The author thanks TGGG Seeletso, ND Hunter, R Hartley, MH Sebina and DW Pearce for their support and assistance.