front cover of aquatic mammals 33(3)

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Aquatic Mammals Aquatic Mammals Volume 33, Number 3, 2007 Aquatic Mammals, Volume 33, Number 3, 2007 ISSN 0167-5427 Contents A. Bjørge, N. Øien, & K-A. Fagerheim: Abundance of Harbour Seals (Phoca vitulina) in Norway Based on Aerial Surveys and Photographic Documentation of Hauled-Out Seals During the Moulting Season, 1996 to 1999 ............................................................ 269 M. A. Iñíguez & V. P. Tossenberger: Commerson’s Dolphins (Cephalorhynchus commersonii) off Ría Deseado, Patagonia, Argentina ......................................................... 276 G. Desportes, L. Buholzer, K. Anderson Hansen, M. A. Blanchet, M. Acquarone, G. Shephard, S. Brando, A. Vossen, & U. Siebert: Decrease Stress; Train Your Animals: The Effect of Handling Methods on Cortisol Levels in Harbour Porpoises (Phocoena phocoena) Under Human Care ........... 286 C. Lockyer, A. A. Hohn, D. W. Doidge, M. P. Heide-Jørgensen, & R. Suydam: Age Determination in Belugas (Delphinapterus leucas): A Quest for Validation of Dentinal Layering .................... 293 V. J. Hayes & J. M. Terhune: Underwater Call Sequences of Weddell Seals (Leptonychotes weddellii) at the Vestfold Hills, Antarctica ............................................................ 305 D. Aurioles-Gamboa & F. J. Camacho-Ríos: Diet and Feeding Overlap of Two Otariids, Zalophus californianus and Arctocephalus townsendi: Implications to Survive Environmental Uncertainty ........ 315 R. Pires, H. Costa Neves, & A. A. Karamanlidis: Activity Patterns of the Mediterranean Monk Seal (Monachus monachus) in the Archipelago of Madeira .......................................... 327 T. Goldstein, C. A. Stephens, S. S. Jang, P. A. Conrad, C. Field, J. L. Dunn, & J. E. Mellish: Longitudinal Health and Disease Monitoring in Juvenile Steller Sea Lions (Eumetopias jubatus) in Temporary Captivity in Alaska Compared with a Free-Ranging Cohort............................. 337 S. E. Finerty, G. R. Hillman, & R. W. Davis: Computer Matching of Sea Otter (Enhydra lutris) Nose Scars: A New Method for Tracking Individual Otters ...................................... 349 T. L. McGuire & T. Henningsen: Movement Patterns and Site Fidelity of River Dolphins (Ina geoffrensis and Sotalia fluviatilis) in the Peruvian Amazon as Determined by Photo-Identification ....... 359 I. L. Beasley & P. R. Davidson: Conservation Status of Marine Mammals in Cambodian Waters, Including Seven New Cetacean Records of Occurrence ......................................... 368 L. E. Highfill & S. A. Kuczaj II: Do Bottlenose Dolphins (Tursiops truncatus) Have Distinct and Stable Personalities? .................................................................... 381 Book Reviews M. Simmonds: Whales, Whaling and Ecosystems. Editors: J. A. Estes, D. P. DeMaster, D. F. Doak, T. M. Williams, & R. Brownell ..................................................... D. R. Prothero: Neptune’s Ark: From Ichthyosaurs to Orcas. D. Rains Wallace.......................... J. G. M. Thewissen: Morphology of the Auditory and Vestibular Organs in Mammals, with Emphasis on Marine Mammals. G. N. Solntseva ................................................. Aquatic Mammals Papers dealing with all aspects of the care, conservation, medicine, and science of aquatic mammals Editor and Copyright: Jeanette A. Thomas Department of Biological Sciences, Western Illinois University–Quad Cities, Moline, IL 61265, USA Co-Editor: Kathleen Dudzinski Dolphin Communication Project, Stonington, Connecticut 06378, USA Prepared and published by Document and Publication Services, Western Illinois University, Macomb, IL 61455, USA Supported through Joint Sponsorship by the European Association for Aquatic Mammals, the Alliance of Marine Mammal Parks and Aquariums, and the International Marine Animal Trainer’s Association Founded by EAAM in 1974

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Photographs of Mediterranean monk seals on the front cover of the journal Aquatic Mammals

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Aquatic Mammals, Volume 33, Number 3, 2007 ISSN 0167-5427

Contents

A. Bjørge, N. Øien, & K-A. Fagerheim: Abundance of Harbour Seals (Phoca vitulina) in Norway Based on Aerial Surveys and Photographic Documentation of Hauled-Out Seals During the Moulting Season, 1996 to 1999 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269

M. A. Iñíguez & V. P. Tossenberger: Commerson’s Dolphins (Cephalorhynchus commersonii) off Ría Deseado, Patagonia, Argentina . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276

G. Desportes, L. Buholzer, K. Anderson Hansen, M. A. Blanchet, M. Acquarone, G. Shephard, S. Brando, A. Vossen, & U. Siebert: Decrease Stress; Train Your Animals: The Effect of Handling Methods on Cortisol Levels in Harbour Porpoises (Phocoena phocoena) Under Human Care . . . . . . . . . . . 286

C. Lockyer, A. A. Hohn, D. W. Doidge, M. P. Heide-Jørgensen, & R. Suydam: Age Determination in Belugas (Delphinapterus leucas): A Quest for Validation of Dentinal Layering . . . . . . . . . . . . . . . . . . . . 293

V. J. Hayes & J. M. Terhune: Underwater Call Sequences of Weddell Seals (Leptonychotes weddellii) at the Vestfold Hills, Antarctica . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305

D. Aurioles-Gamboa & F. J. Camacho-Ríos: Diet and Feeding Overlap of Two Otariids, Zalophus californianus and Arctocephalus townsendi: Implications to Survive Environmental Uncertainty . . . . . . . . 315

R. Pires, H. Costa Neves, & A. A. Karamanlidis: Activity Patterns of the Mediterranean Monk Seal (Monachus monachus) in the Archipelago of Madeira . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327

T. Goldstein, C. A. Stephens, S. S. Jang, P. A. Conrad, C. Field, J. L. Dunn, & J. E. Mellish: Longitudinal Health and Disease Monitoring in Juvenile Steller Sea Lions (Eumetopias jubatus) in Temporary Captivity in Alaska Compared with a Free-Ranging Cohort. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337

S. E. Finerty, G. R. Hillman, & R. W. Davis: Computer Matching of Sea Otter (Enhydra lutris) Nose Scars: A New Method for Tracking Individual Otters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 349

T. L. McGuire & T. Henningsen: Movement Patterns and Site Fidelity of River Dolphins (Ina geoffrensis and Sotalia fluviatilis) in the Peruvian Amazon as Determined by Photo-Identification . . . . . . . 359

I. L. Beasley & P. R. Davidson: Conservation Status of Marine Mammals in Cambodian Waters, Including Seven New Cetacean Records of Occurrence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 368

L. E. Highfill & S. A. Kuczaj II: Do Bottlenose Dolphins (Tursiops truncatus) Have Distinct and Stable Personalities? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 381

Book Reviews

M. Simmonds: Whales, Whaling and Ecosystems. Editors: J. A. Estes, D. P. DeMaster, D. F. Doak, T. M. Williams, & R. Brownell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

D. R. Prothero: Neptune’s Ark: From Ichthyosaurs to Orcas. D. Rains Wallace. . . . . . . . . . . . . . . . . . . . . . . . . .

J. G. M. Thewissen: Morphology of the Auditory and Vestibular Organs in Mammals, with Emphasis on Marine Mammals. G. N. Solntseva . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Aquatic MammalsPapers dealing with all aspects of the care,

conservation, medicine, and science of aquatic mammals

Editor and Copyright: Jeanette A. Thomas

Department of Biological Sciences, Western Illinois University–Quad Cities, Moline, IL 61265, USA

Co-Editor: Kathleen Dudzinski Dolphin Communication Project, Stonington, Connecticut 06378, USA

Prepared and published by Document and Publication Services, Western Illinois University, Macomb, IL 61455, USA

Supported through Joint Sponsorship by the European Association for Aquatic Mammals,

the Alliance of Marine Mammal Parks and Aquariums, and the International Marine Animal Trainer’s Association

Founded by EAAM in 1974

Established by the EAAM in 1974

AQUATIC MAMMALSThe European Association for Aquatic Mammals (EAAM), the Alliance of Marine

Mammal Parks and Aquariums (AMMPA), and the International Marine Animal Trainers’ Association jointly sponsor Aquatic Mammals (ISSN 0167-5427), printed four times per year.

Managing EditorJeanette A. Thomas, Ph.D., Professor

Department of Biological Sciences, Western Illinois University–Quad Cities, 3561 60th Street, Moline, Illinois 61265, USA

E-mail: [email protected], Tel: (309) 762-9481, ext. 311, Fax: (309) 762-6989

Co-EditorKathleen M. Dudzinski, Ph.D., Director

Dolphin Communication Project, 222 Wolf Neck Road, Stonington, Connecticut 06378, USA E-mail: [email protected], Tel: (860) 514-4704, Manual Fax: (860) 536-1740

Book Review EditorJustin Gregg

School of Psychology, Áras an Phiarsaigh, Trinity College, Dublin 2, Ireland E-mail: [email protected], Tel: +31 (0)475-330006 (Netherlands),

Fax: +1-860-572-5973 (USA)

Graduate Assistants to the EditorsEmily Walter Sara Crowell

Western Illinois University–Quad Cities, 3561 60th Street, Moline, Illinois 61265, USAE-mail: [email protected] and [email protected]

Tel: (309) 762-9481, ext. 289, Fax: (309) 762-6989

Editors EmeritiWillem H. Dudok van Heel, Victor J. A. Manton, and Paul E. Nachtigall

Editorial BoardArne Bjørge, Institute of Marine Research, University of Oslo, Oslo, Norway

Manuel E. dos Santos, Instituto Superior de Psicologia Aplicada, Lisboa, PortugalManuel García Hartmann, Duisburg Zoo, Duisburg, Germany

Philip Hammond, Sea Mammal Research Unit, University of St Andrews, St Andrews, Fife, UKHeidi Harley, Division of Social Sciences, New College of Florida, Sarasota, Florida, USA

A. Rus Hoelzel, School of Biological and Biomedical Sciences, University of Durham, Durham, UKChristina Lockyer, North Atlantic Marine Mammal Commission, Polar Environmental Centre, Tromsø, Norway

Lee A. Miller, Institute of Biology, University of Southern Denmark, Odense, DenmarkPaul E. Nachtigall, Hawaii Institute of Marine Biology, Kailua, Hawaii, USA

Giuseppe Notarbartolo di Sciara, Tethys Research Institute, Milano, ItalyDan Odell, Hubbs-Sea World Research Institute, Orlando, Florida, USA

Grey Stafford, Wildlife World Zoo, Litchfield Park, Arizona, USA

Publication and Administrative Services Document and Publication Services (DPS), Western Illinois University, Macomb, Illinois 61455, USA

To obtain hard copies, back issues, or CD versions, contact Gina Colley, DPS, Western Illinois University, Macomb, Illinois 61455, USA; E-mail: [email protected]

Cover photos of Mediterranean monk seals provided by Rosa Pires and Filipe Viveiros from Parque Natural da Madeira Service and A. A. Karamanlidis/MOm.

AQUATIC MAMMALSEuropean Association for Aquatic Mammals

Board of the European Association for Aquatic MammalsPresident: Niels van Elk, Dolfinarium Harderwijk, Strandboulevard Post 1,

3841 AB, Harderwijk, The Netherlands; E-mail: [email protected] Elect: Birgitta Mercera, Parc Asterix, BP 8, 60128 Plailly, France;

E-mail: [email protected] President (2004-2006): Pedro Roberto Lavia, Mundo Aquatico, Zoomarine, Estrada Nacional

125 KM 65, Guia, 8200 Albufeira, Portugal; E-mail: [email protected]/Treasurer: Sabrina Brando, Animal Concepts, Sea Mammal Research Unit, Gatty Marine Laboratory,

University of St. Andrews, St. Andrews, Fife, UK; E-mail: [email protected] Committee: Emily Walter, Western Illinois University–Quad Cities,

Moline, Illinois 61265, USA; E-mail: [email protected]

Alliance of Marine Mammal Parks and AquariumsExecutive Director: Marilee Menard

418 North Pitt Street, Alexandria, Virginia 22314, USA; E-mail: [email protected] Board of Directors

President: Dave Merritt, Indianapolis ZooImmediate Past President: Jeff Jouett, Dolphin QuestVice President: Clint Wright, Vancouver Aquarium

Treasurer: Bill Hughes, SeaWorld OrlandoSecretary: John Rupp, Point Defiance Zoo and Aquarium

Director-at-Large: Mark Swingle, Virginia Aquarium & Marine Science CenterDirector-at-Large: Dave Blasko, Six Flags Marine World

International Marine Animal Trainers’ Associationc/o John G. Shedd Aquarium, 1200 S. Lake Shore Drive, Chicago, Illinois, 60605, USA

2007 Board of DirectorsPresident: Billy Hurkey

President Elect: Shelly BallmanPast President: Al Kordowski

Secretary: Michael HuntTreasurer: Traci Belting

First Vice President: Dave RobertsSecond Vice President: Andrew Scullion

Third Vice President: Mike Osborne

For instructions to authors, abstracts of previous issues, and publication fees, see the journal website:www.aquaticmammalsjournal.org

For information on EAAM, see website:http://eaam.org

For information on the Alliance of Marine Mammal Parks and Aquariums, see website:www.ammpa.org

For information on IMATA, see website:www.imata.org

For details about the online version of Aquatic Mammals, see the Ingenta website:http://ingentaconnect.com