1. Centre for Wildlife Management; University of Pretoria; Private bag X20, Hatfield Pretoria 0028 South Africa
2. Resource Ecology Group; Wageningen University; Droevendaalsesteeg 3a, 6708 PB Wageningen The Netherlands
3. Scientific Services; Kruger National Park; Private Bag X402 Skukuza 1350 South Africa
4. Biological and Conservation Sciences; Westville Campus; University of KwaZulu-Natal; Private Bag X54001 Durban 4000 South Africa