1 Department of Animal Behaviour, Bielefeld University, 33501, Bielefeld, Germany. [email protected].
2 Department of Animal Behaviour, Bielefeld University, 33501, Bielefeld, Germany.
3 Department of Zoology and Entomology, Mammal Research Institute, University of Pretoria, Private Bag X20, Hatfield, 0028, South Africa.
4 Norwegian Polar Institute, Fram Centre, 9296, Tromsø, Norway.
5 Department of Natural Sciences, University of Agder, 4630, Kristiansand, Norway.
6 British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 OET, UK.
7 Antarctic Ecosystem Research Division, Southwest Fisheries Science Center, National Marine Fisheries, National Oceanographic and Atmospheric Administration, 8901 La Jolla Shores Drive, La Jolla, CA, 92037, USA.
8 Institute of Marine Science, University of California Santa Cruz, 1156 High Street, Santa Cruz, CA, 95064, USA.
9 South Australian Research and Development Institute, 2 Hamra Avenue, West Beach, South Australia, 5024, Australia.
10 School of Biological Sciences, The University of Adelaide, Adelaide, South Australia, 5005, Australia.
11 Centre d'Etudes Biologiques de Chizé (CEBC), CNRS and Université de La Rochelle - UMR 7372, 79360, Villiers en Bois, France.
12 Department of Animal Behaviour, Bielefeld University, 33501, Bielefeld, Germany. [email protected].
13 British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 OET, UK. [email protected].