1. Department of Biological Sciences and Biotechnology, Botswana International University of Science and Technology, Private Bag 16, Palapye 10071, Botswana
2. Department of Biology, The University of Western Ontario, London, ON N6A 5B7, Canada
3. Department of Zoology and Entomology, University of Pretoria, Private Bag X20, Pretoria 0028, South Africa
4. Department of Agricultural and Biosystems Engineering, University of Zimbabwe, Mount Pleasant, Harare P.O. Box MP167, Zimbabwe
5. Department of Zoology and Entomology, Rhodes University, Makhanda 6140, South Africa