1. ProDelphinus, Jose Galvez 780-E, Miraflores, Lima 18, Peru
2. Centre for Ecology and Conservation, University of Exeter, Penryn, Cornwall TR10 9FE, UK
3. NOAA, National Marine Fisheries Service, Pacific Islands Fisheries Science Center, Honolulu, HI 96818, USA
4. Facultad de Biologia Marina, Universidad Cientifica del Sur, Panamericana Sur Km 19, Villa, Lima, Peru