1. School of Biological Sciences (Zoology); University of Aberdeen; Tillydrone Avenue Aberdeen AB24 2TZ United Kingdom
2. Institute of Zoology; Zoological Society of London; Regent's Park London NW1 4RY United Kingdom
3. Sea Mammal Research Unit; Scottish Oceans Institute; University of St Andrews; St Andrews Fife, KY16 8LB United Kingdom
4. Wildlife Unit; SAC Veterinary Services; Drummondhill, Stratherrick Road Inverness IV2 4JZ United Kingdom
5. Instituto Español de Oceanografía; Centro Oceanográfico de Vigo; PO Box 1552, 36200 Vigo Spain
6. Oceanlab, Institute of Biological and Environmental Sciences; University of Aberdeen; Main Street Newburgh Aberdeenshire AB41 6AA United Kingdom
7. Oceanlab, Institute of Biological and Environmental Sciences; University of Aberdeen; Main Street Newburgh, Aberdeenshire AB41 6AA United Kingdom
8. CESAM & Departamento de Biologia; Universidade de Aveiro; 3810-193 Aveiro Portugal