[1] Florida Int Univ, Inst Environm, Dept Biol Sci, North Miami, FL 33181 USA
[2] Univ Hawaii Manoa, Marine Mammal Res Program, Hawaiian Inst Marine Biol, Kaneohe, HI USA
[3] Texas A&M Univ, Dept Wildlife & Fisheries Sci, Galveston, TX USA
[4] Macquarie Univ, Sch Nat Sci, Sydney, NSW, Australia
[5] Univ Western Australia, Australian Inst Marine Sci, Crawley, WA, Australia
[6] Univ Nacl Mar del Plata, CONICET, Mar Del Plata, Argentina
[7] Massey Univ, Sch Nat Sci, Cetacean Ecol Res Grp, Auckland, New Zealand