1. Institute for Marine and Antarctic Studies; University of Tasmania; Private Bag 129 Hobart 7001 Tas. Australia
2. Australian School of Advanced Medicine; Macquarie University; 2 Technology Place Sydney 2109 NSW Australia
3. Ocean and Earth Sciences; University of Southampton Waterfront Campus; Southampton SO14 3ZH UK
4. Department of Zoology; University of Oxford; South Parks Road Oxford OX1 3PS UK
5. Scripps Institution of Oceanography; University of California San Diego; San Diego CA USA
6. Australian Antarctic Division; 203 Channel Highway Kingston 7050 Tas. Australia
7. British Antarctic Survey; High Cross; Madingley Road Cambridge CB3 0ET UK
8. Australian Institute of Marine Science; The UWA Oceans Institute; 35 Stirling Highway Crawley WA 6009 Australia
9. School of Biological Sciences; University of Tasmania; Private Bag 5 Hobart 7001 Tas. Australia