1. Centre for Sustainable Aquatic Ecosystems Harry Butler Institute, Murdoch University Perth Western Australia 6150 Australia
2. SMRU Consulting, Scottish Oceans Institute East Sands, University of St Andrews St Andrews KY16 8LB United Kingdom
3. School of Biological Sciences University of Bristol Bristol BS8 1TQ United Kingdom
4. School of Biological Sciences University of Western Australia Crawley Western Australia 6009 Australia
5. Department of Anthropology University of Zurich 8057 Zurich Switzerland
6. Australian Antarctic Division 203 Channel Highway Kingston Tasmania 7050 Australia