Aquatic Mammals Aquatic Mammals, Volume 40, Number 1, 2014 ISSN 0167-5427 Contents Letters from the Editors ...... 1 Aquatic P . Zhang, J . Han, Z . Lu, & R . Chen: Molecular Evidence of a Captive-Born Intergeneric Hybridization Between Bottlenose and Risso’s Dolphins: Tursiops truncatus × Grampus griseus ...... 5

J . W . Higdon & S . H . Ferguson: Inuit Recollections of a 1950s Killer Whale (Orcinus orca) Ice Entrapment in Foxe Basin, Nunavut, Canada ...... 9 Mammals M . S . Lowry, R . Condit, B . Hatfield, S . G . Allen, R . Berger, P . A . Morris, B . J . Le Boeuf, & J .Reiter: Abundance, Distribution, and Population Growth of the Northern Elephant Seal (Mirounga angustirostris) in the United States from 1991 to 2010 ...... 20 M . A . Smultea & T . A . Jefferson: Changes in Relative Occurrence of Cetaceans in the Southern California Bight: A Comparison of Recent Aerial Survey Results with Historical Data Sources ...... 32 A . M . Zoidis, K . S . Lomac-MacNair, A . E . Chomos-Betz, A . J . Day, & A . S . McFarland: Effects of Sex, Seasonal Period, and Sea State on Calf Behavior in Hawaiian Humpback Whales (Megaptera novaeangliae) ...... 44 R . Carlini, M . C . de Francesco, & S . D . Libera: Biometric Measures Indicating Sexual Dimorphism in Stenella coeruleoalba (Meyen, 1833) (Delphinidae) in the North-Central Tyrrhenian Sea ...... 59 J . M . Kleen & A . D . Breland: Increases in Seasonal Manatee (Trichechus manatus latirostris) Abundance Within Citrus County, Florida ...... 69 C . Kovacs & T . Cox: Quantification of Interactions Between Common Bottlenose Dolphins (Tursiops truncatus) and a Commercial Shrimp Trawler Near Savannah, Georgia ...... 81 E . Mercado III: Tubercles: What Sense Is There? ...... 95

Historical Perspectives Karen Pryor: A Dolphin Journey ...... 104

Aquatic Mammals Aquatic Mammals publishes hard copies on-demand, CDs, and online peer-reviewed scientific articles related to marine mammals (whales, dolphins, seals, fur seals, sea lions, walrus, dugongs, manatees, sea otters, and polar bears) . Topics of publication on both captive animals and wild marine mammals include aspects of husbandry; behavior; conservation; veterinary medicine; anatomy; physiology; training; population trends; and the effects of pollution, climate change, and noise . In addition, Aquatic Mammals has the Historical Perspectives feature, which includes essays and high definition DVDs of interviews with prominent marine mammal scientists . The journal also publishes Book Reviews . Supported through Joint Sponsorship by the Copyright and Editor: Aquatic Mammals Journal, attn: Kathleen M . Dudzinski European Association for Aquatic Mammals, Co-Editors: Shane B . Kanatous, David A . S . Rosen, Deirdre Yeater, and Elizabeth Henderson the Alliance of Marine Mammal Parks and Aquariums,

P .O . Box 711, Old Mystic, CT 06372-0711, USA Volume 40, N and the International Marine Animal Trainers’ Association Prepared and published by Document and Publication Services, Western Illinois University, Macomb, IL 61455, USA Founded by EAAM in 1974 umber 1, 2014

Years 41974-2014 Established by the EAAM in 1974 Aquatic Mammals Aquatic Mammals Board of the European Association for Aquatic Mammals (EAAM) www.eaam.org The European Association for Aquatic Mammals (EAAM), the Alliance of Marine Mammal Parks President: Jesús Fernández Morán, Zoo Aquarium Madrid, Parques Reunidos, S .A ., and Aquariums (AMMPA), and the International Marine Animal Trainers’ Association (IMATA) president@eaam .org jointly sponsor Aquatic Mammals (ISSN 0167-5427), published four times per year. President-Elect: Arlete Sogorb, Lisbon Zoo, president_elect@eaam .org Past President: Claudia Gili, Acquario di Genova, past_ president@eaam .org Managing Editor Secretary: Camino Herreros Paris, Dolfinarium Harderwijk, secretary@eaam .org Kathleen M . Dudzinski, Ph .D . Treasurer: Camino Herreros Paris, Dolfinarium Harderwijk, treasurer@eaam .org P O. . Box 711, Old Mystic, Connecticut 06372-0711, USA Information Committee: Dani Barchana and Ann-Louise Jensen, information@eaam .org E-mail: kathleen@dcpmail .org or aquaticmammals@gmail .com, Tel: +1 (860) 514-4704 Alliance of Marine Mammal Parks and Aquariums (AMMPA) Co-Editors www.ammpa.org Shane B . Kanatous, Ph .D ., Department of Biology, Colorado State University Executive Director: Kathleen Dezio E-mail: Shane .Kanatous@ColoState .edu E-mail: ammpa@aol .com David A . S . Rosen, Ph .D ., Marine Mammal Research Unit, University of British Columbia Board of Directors E-mail: rosen@zoology .ubc .ca President: Billy Hurley, Georgia Aquarium, bhurley@georgiaaquarium .org Immediate Past President: Dave Blasko, The Mirage Dolphin Habitat, dablasko@mirage .com Deirdre Yeater, Ph .D ., Sacred Heart University Past President: Mark Swingle, Virginia Aquarium and Marine Science Center Foundation, E-mail: yeaterd@sacredheart .edu mswingle@virginiaaquarium .com Elizabeth Henderson, Ph .D ., National Marine Mammal Foundation, San Diego, California Vice President: Kevin Willis, Minnesota Zoo, kevin .willis@state .mn .us E-mail: elizabeth .henderson@nmmpfoundation .org Treasurer: Bill Hughes, SeaWorld Orlando, bill .hughes@seaworld .com Secretary: Suzanne Gendron, Ocean Park, suzanne .gendron@oceanpark .com .hk Book Review Editor Director-at-Large: Stewart Clark, Discovery Cove, Stewart .Clark@DiscoveryCove .com MaryEllen Mateleska, Mystic Aquarium Director-at-Large: Rita Irwin, Dolphin Research Center, Rita@dolphins .org E-mail: mmateleska@searesearch .org Editors Emeriti International Marine Animal Trainers’ Association (IMATA) Willem H . Dudok van Heel, Victor J . A . Manton, Paul E . Nachtigall, Jeanette A . Thomas www.imata.org c/o John G . Shedd Aquarium, 1200 S . Lake Shore Drive, Chicago, Illinois 60605, USA Editorial Board Board of Directors Arne Bjørge, Institute of Marine Research, Gaustadalleen 21, 0349 Oslo, Norway President: Bill Wolden, Dolphin Quest, president@imata .org Manuel E . dos Santos, Instituto Superior de Psicologia Aplicada, Lisboa, Portugal President-Elect: Linda Erb, Dolphin Research Center, presidentelect@imata .org Manuel García Hartmann, Marineland Antibes, France Past President: Eric Gaglione, Georgia Aquarium, pastpresident@imata .org Heidi Harley, Division of Social Sciences, New College of Florida, Sarasota, Florida, USA Secretary: Alex Mata, Dolphin Discovery, secretary@imata .org A . Rus Hoelzel, School of Biological and Biomedical Sciences, University of Durham, Durham, UK Treasurer: Robert Roozendall, Six Flags Discovery Kingdom, treasurer@imata .org Christina Lockyer, North Atlantic Marine Mammal Commission, Tromsø, Norway First Vice President: Kelly Flaherty Clark, SeaWorld Orlando, firstvp@imata .org Lee A . Miller, Institute of Biology, University of Southern Denmark, Odense, Denmark Second Vice President: Teri Corbett, Atlantis, secondvp@imata .org Paul E . Nachtigall, Hawaii Institute of Marine Biology, Kailua, Hawaii, USA Third Vice President: Suzanne Smith, Audubon Aquarium of the Americas, thirdvp@imata .org Giuseppe Notarbartolo di Sciara, Tethys Research Institute, Milano, Italy Director-at-Large (Past Secretary): Jennifer Leach, SeaWorld San Diego, director@imata .org Dan Odell, Hubbs-Sea World Research Institute, Orlando, Florida, USA Grey Stafford, Wildlife World Zoo, Litchfield Park, Arizona, USA For subscriptions, instructions to authors, abstracts of previous issues, publication fees, hard copies, back issues, CDs, and Historical Perspectives DVDs, see the Aquatic Mammals website: Publication and Administrative Services www .aquaticmammalsjournal .org Document and Publication Services (DPS), Western Illinois University, Macomb, Illinois 61455, USA For details about the online versions of Aquatic Mammals, see the following websites: Cover Photo Credit Aquatic Mammals: www .aquaticmammalsjournal .org In celebration of Aquatic Mammals’ 40th anniversary, several past covers were selected ProQuest: www .proquest .com (specific to library subscribers) to give a sample of the types of subjects focused on in the journal .