1. Department of Vertebrate Zoology, Faculty of Biology, Moscow State University, Moscow, Russia
2. Marine and Freshwater Research Institute, Reykjavik, Iceland
3. Sea Mammal Research Unit, Scottish Oceans Institute, University of St. Andrews, St. Andrews, Scotland
4. Pacific Biological Station, Fisheries and Oceans Canada, Nanaimo, Canada
5. JASCO Research Ltd., British Columbia, Canada
6. North Gulf Oceanic Society, Alaska, USA
7. Whale and Dolphin Conservation, Allington Park, Bridport, UK