1. Department of Life and Consumer Sciences College of Agriculture and Environmental Sciences, University of South Africa South Africa
2. Mammal Research Institute, Department of Zoology and Entomology University of Pretoria South Africa
3. Centre for Statistics in Ecology, Environment and Conservation, Department of Statistical Sciences University of Cape Town Cape Town South Africa
4. Institute for Marine and Antarctic Studies, University of Tasmania Tasmania Australia
5. School of Ocean and Earth Science, National Oceanography Centre Southampton UK
6. Australian Antarctic Division Kingston Tasmania Australia