1. Centre for Ecology and Conservation, Biosciences, College of Life and Environmental Sciences, University of Exeter, Cornwall TR10 9FE, UK
2. Whale and Dolphin Conservation, Brookfield House, Chippenham, Wiltshire SN15 1LJ, UK
3. School of Biological Sciences, University of Auckland, Auckland 1010, New Zealand
4. Sea Mammal Research Unit, School of Biology, University of St Andrews, St Andrews KY16 8LB, UK
5. Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK
6. ISPA—Instituto Universitário, 1149-041 Lisbon, Portugal
7. Marine Mammal and Turtle Division, Southwest Fisheries Science Center, National Marine Fisheries Service, NOAA, La Jolla, CA 92037, USA
8. Scripps Institution of Oceanography, UC San Diego, La Jolla, CA 92093-0203, USA
9. Cetacean Ecology and Acoustics Laboratory, School of Veterinary Science, The University of Queensland, QLD 4343, Australia
10. Centre for Social Learning and Cognitive Evolution, School of Biology, University of St Andrews, St Andrews KY16 9TH, UK
11. Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
12. Centre for Biological Diversity, School of Biology, University of St Andrews, St Andrews KY16 9TH, UK
13. Centre for Social Learning and Cognitive Evolution, School of Psychology and Neuroscience, University of St Andrews, St Andrews KY16 9JP, UK
14. Department of Biological Sciences, Macquarie University, Sydney, NSW 2109, Australia
15. Max Planck Institute of Animal Behavior, Radolfzell 78315, Germany
16. Centre for the Advanced Study of Collective Behaviour, University of Konstanz, Konstanz 78467, Germany
17. Department of Biology and Biotechnologies, University of Rome La Sapienza, 00185 Rome, Italy
18. Amboseli Trust for Elephants, Langata 00509, Nairobi, Kenya
19. Department of Zoology, University of British Columbia, Vancouver, BC, Canada
20. Tethys Research Institute, 20121 Milan, Italy
21. Bristol Veterinary School, University of Bristol, Bristol BS40 5DU, UK
22. Humane Society International, London N1 7LY, UK
23. Istituto Superiore Protezione Ricerca Ambientale (ISPRA), I-40064 Ozzano Emilia (BO), Italy
24. Marine Mammal Laboratory, Alaska Fisheries Science Center, NOAA Fisheries, Seattle, WA 98115, USA
25. School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA 98105, USA
26. Biology Department, Dalhousie University, Halifax, Nova Scotia, Canada B3H4R2
27. Joint Nature Conservation Committee, Monkstone House, Peterborough PE1 1JY, UK