1. Antarctic Ecosystem Research Division, Southwest Fisheries Science Center; National Marine Fisheries Service, NOAA; 8901 La Jolla Shores Drive, La Jolla, California 92037 U.S.A.
2. CETREC (Cetacean Research); PO Box 140, Exmouth, Western Australia 6707 Australia
3. Centre for Marine Science & Technology and Project O.R.C.A (Orca Research and Conservation Australia); Curtin University; GPO Box U1987, Perth Western Australia 6845 Australia
4. Project O.R.C.A (Orca Research and Conservation Australia), Curtin University; GPO Box U1987, Perth Western Australia 6845 Australia
5. Seven Seas Marine Consultancy; PO Box 11422, Amsterdam The Netherlands