1. University of Aberdeen, Department of Zoology, Lighthouse Field Station, Cromarty, Ross-shire IV11 8JY, UK
2. NERC Sea Mammal Research Unit, Gatty Marine Laboratory, School of Environmental and Evolutionary Biology, University of St Andrews, St Andrews, Fife KY16 8LB, UK
3. Tethys Research Institute, Viale GB Gadio 2, I-20121Milano, Italy
4. Parque Natural da Arrãbida/Reserva Natural do Estuãrio do Sado, Prac a da Repüblica, 2900 Setü bal, Portugal
5. Zoology Department, University College Cork, Cork, Ireland
6. Dë partement Mammiferes Marins, Ocëanopolis, BP 411, 29275 Brest Cedex, France
7. Duke UniversityMarine Laboratory, Beaufort, NC 28516, USA
8. Department of Marine Science, POBox 56, Dunedin, New Zealand
9. Chicago Zoological Society, c/o Mote Marine Laboratory, 1600 Thompson Parkway, Sarasota, FL 34236, USA
10. Whale and Dolphin Conservation Society, James StreetWest, Bath, Avon BA1 2BT, UK