1. Department of Nature Conservation; Tshwane University of Technology; Private Bag X680 Pretoria 0001 South Africa
2. Wildhorus Limited; The Old Rectory; Maidstone Road Nettlestead Maidstone Kent ME18 5EZ U.K.
3. Department of Finance and Investment Management; University of Johannesburg; PO Box 524 Auckland Park 2006 South Africa
4. Vertebrate Pest Research Unit; Biosecurity NSW; Orange Agricultural Institute; 1447 Forest Road Orange NSW 2800 Australia
5. School of Environmental and Rural Sciences; University of New England; Armidale NSW 2351 Australia