1. Moss Landing Marine Laboratories, San Jose State University, Moss Landing, CA 93933, USA
2. Zoophysiology, Department of Biology, Aarhus University, 8000 Aarhus, Denmark
3. Marine Mammal Research, Bioscience to Ecoscience, Aarhus University, 4000 Roskilde, Denmark
4. Aarhus Institute of Advanced Studies, Aarhus University, 8000 Aarhus, Denmark
5. Centre d'Etudes Biologiques de Chizé, UMR7372 CNRS-Université La Rochelle, 79360 Villiers en Bois, France
6. Institute for Terrestrial and Aquatic Wildlife Research, University of Veterinary Medicine Hannover, 25761 Büsum, Germany