1. United Nations Environment Programme-World Conservation Monitoring Centre; 219 Huntingdon Road Cambridge CB3 0DL UK
2. Department of Geography; University of Cambridge; Downing Place; Cambridge CB3 3EN UK
3. Fisheries Centre; University of British Columbia; Vancouver BC Canada V6T 1Z4
4. Department of Biological Sciences; University of South Carolina; Columbia SC 29208 USA
5. Institute for Marine and Antarctic Studies; University of Tasmania; Hobart 7000 Australia