1. Centre for Sustainable Oceans, Faculty of Applied Sciences, Cape Peninsula University of Technology, Cape Town, South Africa
2. Mammal Research Institute Whale Unit, Department of Zoology and Entomology, University of Pretoria, Pretoria, South Africa
3. Ezemvelo KwaZulu-Natal Wildlife, Pietermaritzburg, South Africa
4. WILDTRUST, Pietermaritzburg, South Africa