1. School of Biological Sciences, Flinders University; Adelaide; SA; 5001; Australia
2. Graduate School of the Environment, Macquarie University; Sydney; NSW; 2109; Australia
3. Museu da Baleia da Madeira; 9200-031; Caniçal; Madeira; Portugal
4. Southwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration; 3333 N. Torrey Pines Ct; La Jolla; CA; 92037; USA
5. Instituto de Conservação da Natureza e Biodiversidade; Rua de Santa Marta, 55; 1150-294; Lisbon; Portugal
6. Coastal-Marine Research Group; Institute of Natural Sciences, Massey University; Private Bag 102 904, North Shore MSC; Auckland; New Zealand
7. Centro de Biologia Ambiental, Faculdade de Ciências, Universidade de Lisboa; Campo Grande; 1749-016; Lisbon; Portugal