1. Madeira Whale Museum; 9200-031 Caniçal Madeira Portugal
2. University of Madeira; Centre of Life Sciences; Marine Biology Station of Funchal; 9000-107 Madeira Portugal
3. CIIMAR/CIMAR; Interdisciplinary Centre of Marine and Environmental Research; University of Porto; 4050-123 Portugal
4. Italian National Institute for Environmental Protection and Research; via Vitaliano Brancati 60 I 00144 Rome Italy