1. Office of Environment and Heritage, PO Box 1967, Hurstville, NSW 2220, Australia.
2. Australian Wetlands, Rivers and Landscape Centre, University of New South Wales, Sydney, NSW 2052, Australia.
3. Department of Biological Sciences, Macquarie University, North Ryde, NSW 2109, Australia.
4. Centre National de la Recherche Scientifique, Centre d'Etudes Biologiques de Chizé, F-79360 Beauvoir-sur-Niort, France.
5. Southwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 8901 La Jolla Shores Drive, La Jolla, CA, USA.
6. British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge, CB3 0ET, UK.
7. School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand.