Use of bioelectrical impedance analysis to assess body composition of seals.
ROSEMARY GALES, DEANE RENOUF AND G. A. J. WORTHY ......................................1

Annual reproductive cycle of the female Hawaiian monk seal (Monachus schauinslandi).
THEA C. JOHANOS, BRENDA L. BECKER AND TIMOTHY J. RAGEN .........................13

Estimating sea otter reproductive rates.
L. L. EBERHARDT AND K. B. SCHNEIDER .......................................................................31

The population dynamics of northern sea lions, 1975 - 1985.
ANNE E. YORK ...................................................................................................................38

Characterization of a bottlenose dolphin (Tursiops truncatus) kidney epithelial cell line.
MICHAEL J. CARVAN III, MICHAEL SANTO STEFANO,
STEPHEN SAFE AND DAVID BUSBEE .............................................................................52

Bottlenose dolphins can generalize rules and develop abstract concepts.
LOUIS M. HERMAN, ADAM A. PACK AND AMY M. WOOD .......................................70

NOTES

The occurrence of calculi in the nasal diverticula of porpoises (Phocoenidae).
BARBARA E. CURRY, JAMES G. MEAD AND ALEJANDRO P. PURGUE ......................81

Annual reproduction by individually identified humpback whales (Megaptera novaeangliae)
in Alaskan waters.
JANICE M. STRALEY, CHRISTINE M. GABRIELE AND C. SCOTT BAKER ..................87

Polydactyly in a bottlenose dolphin, Tursiops truncatus.
ALASTAIR G. WATSON, LARRY E. STEIN, COLLEEN MARSHALL
AND GEORGE A. HENRY ...................................................................................................93

Right whale (Eubalaena glacialis) sighting off San Clemente Island, California.
JAMES V. CARRETTA, MORGAN S. LYNN AND CARRIE A. LEDUC .........................101

Subspecific status of the freshwater harbor seal (Phoca vitulina mellonae): a re-assessment.
RICHARD J. SMITH, DAVID M. LAVIGNE AND WILLIAM R. LEONARD ...................105

Atypical interactions between male southern sea otters and pinnipeds.
BRIAN B. HATFIELD, RONALD J. JAMESON,
THOMAS G. MURPHEY AND DENISE D. WOODARD ..................................................111

Recent strandings of rough-toothed dolphins (Steno bredanensis) on the Oregon and
Washington coasts.
RICHARD C. FERRERO, JANET HODDER AND JACK CESARONE ............................114

Movements and dive behavior of a satellite-monitored Atlantic white-sided dolphin
(Lagenorhynchus acutus) in the Gulf Of Maine.
BRUCE R. MATE, KATHLEEN M. STAFFORD,ROBERT NAWOJCHIK
AND J. LAWRENCE DUNN ..............................................................................................116

Entanglement of California sea lions at Los Islotes, Baja California Sur, Mexico.
ROBERT HARCOURT, DAVID AURIOLES AND JOSE SANCHEZ ...............................122

Exfoliated cells as the most accessible DNA source for captive whales and dolphins.
MICHEL C. MILINKOVITCH, J. LAWRENCE DUNN AND JEFFREY R. POWELL .....125

BOOKS

Reviews ................................................................................................................................129

Pinnipeds and El Nino: Responses to Environmental Stress. F. Trillmich and K. A. Ono, eds.
Springer-Verlag, New York, NY.
Reviewed by Edward H. Miller.

MEMORIES

Deane Renouf ........................................................................................................................134

NEWS ..................................................................................................................................136

Distribution and numbers of striped dolphins in the western Mediterranean Sea after
the 1990 epizootic outbreak.
JAUME FORCADA, ALEX AGUILAR, PHILIP S. HAMMOND,
XAVIER PASTOR AND RICARDO AGUILAR .................................................................137

Body weight and growth of juvenile male northern fur seals, Callorhinus ursinus.
JASON D. BAKER, CHARLES W. FOWLER AND GEORGE A. ANTONELIS ..............151

Observations of Florida manatees (Trichechus manatus latirostris) around selected
power plants in winter.
JOHN E. REYNOLDS, III AND J. ROSS WILCOX ..........................................................163

Biases associated with non-lethal methods of determining the diet of northern elephant seals.
JAMES T. HARVEY AND GEORGE A. ANTONELIS ......................................................178

Cross-reactivity of antibodies to human antigens with tissues of the bottlenose dolphin,
Tursiops truncatus, using immunoperoxidase techniques.
DHRUV KUMAR AND DANIEL F. COWAN ...................................................................188

New Zealand herd stranding sites do not relate to geomagnetic topography.
MARK BRABYN AND RICHARD V. C. FREW ...............................................................195

NOTES

Swimming behaviors and speeds of wild Dall's porpoises (Phocoenoides dalli) .
T. C. LAW AND R. W. BLAKE ..........................................................................................208

The clymene dolphin, Stenella clymene (Gray, 1846), in the southwestern
South Atlantic Ocean.
P. C. SIMOES-LOPES, P. PRADERI AND G. DE S. PAULA ..............................................

Attack of killer whales (Orcinus orca) on humpback whales (Megaptera novaeangliae)
on a South American Pacific breeding ground.
LILIAN FLOREZ-GONZALEZ, JUAN J. CAPELLA
AND HOWARD C. ROSENBAUM ....................................................................................218

Extralimital residency of bottlenose dolphins in the western North Atlantic.
DAVID N. WILEY, FREDERICK W. WENZEL AND SHARON B. YOUNG ..................223

Oxygen extraction in free-swiming gray whale calves.
JAMES L. SUMICH ............................................................................................................226

Prey of juvenile northern elephant seals (Mirounga angustirostris) in the
Southern California Bight.
ELIZABETH HACKER SINCLAIR .....................................................................................230

BOOKS

Reviews ................................................................................................................................240

The Sonar of Dolphins. Whitlow W. L. Au. Springer-Verlag, New York.
Reviewed by Jeanette Thomas.

Mammal Species of the World: A Taxonomic and Geographic Reference.
Second Edition. Edited by Don E. Wilson and DeeAnn M. Reeder.
Smithsonian Institution Press, Washington and London.
Reviewed by Dale W. Rice.

BUSINESS ...........................................................................................................................244

LETTERS

Scientific Correspondence .....................................................................................................250

NEWS .................................................................................................................................252

Sexual composition and analysis of reproductive females in the North Atlantic
right whale, Eubalaena glacialis, population.
MOIRA W. BROWN, SCOTT D. KRAUS, DAVID E. GASKIN
AND BRADLEY N. WHITE ................................................................................................253

Development, sexual dimorphism, and individual variation in the skeleton of the
finless porpoise, Neophocaena phocaenoides, in the coastal waters of western
Kyushu, Japan.
HIDEYOSHI YOSHIDA, MIKI SHIRAKIHARA, AKIRA TAKEMURA
AND KUNIO SHIRAKIHARA ...........................................................................................266

Cetaceans of the northern Gulf of California: distribution, occurrence, and relative abundance.
GREGORY K. SILBER, MICHAEL W. NEWCOMER, PATRICIA C. SILBER,
HECTOR PREZ-CORTES M. AND GRAEME M. ELLIS ...............................................283

Age and sex composition of the striped dolphin die-off in the western Mediterranean.
NURIA CALZADA, CHRISTINA H. LOCKYER AND ALEX AGUILAR ........................299

The influence of climatic seasonality on the life cycle of the Pribilof northern fur seal.
ANDREW W. TRITES AND GEORGE A. ANTONELIS ...................................................311

Digestibility of crustaceans and capelin in harp seals (Phoca groenlandica).
P. E. MRTENSSON, E. S. NORDOY AND A. S. BLIX ..................................................325

Seasonal changes in food intake of harp seals (Phoca groenlandica) at 69N .
A. R. LAGER, E. S. NORDOY AND A. S. BLIX ................................................................332

NOTES

First sightings of melon-headed whales (Peponocephala electra) in the Gulf of Mexico.
KEITH D. MULLIN, THOMAS A. JEFFERSON, LARRY J. HANSEN
AND WAYNE HOGGARD .................................................................................................342

The use of photoidentification to study the Amazon river dolphin, Inia geoffrenis,
in the Colombian Amazon.
FERNANDO TRUJILLO GONZALEZ ...............................................................................348

Herpes-like virus in dusky dolphins, Lagenorhynchus obscurus, from coastal Peru.
M.-F. VAN BRESSEM, K. VAN WAEREBEEK, A. GARCIA-GODOS,
D. DEKEGEL AND P. P. PASTORET ................................................................................354

Additional cetacean records for the Leeward Dutch Antilles.
ADOLPHE O. DEBROT AND NELIO B. BARROS ..........................................................359

Status of Ganges river dolphins (Platanista gangetica) in the Karnali, Mahakali,
Narayani and Sapta Kose rivers of Nepal and India in 1993.
BRIAN D. SMITH, RAVINDRA K. SINHA, UBRAJ REGMI
AND KUMAR SAPKOTA .................................................................................................368

Symmetry in testicular development in long-finned pilot whales.
G. DESPORTES ...................................................................................................................376

First account of Stellar sea lion (Eumetopias jubatus) predation on a California sea lion
(Zalophus californianus).
PAMELA E. BYRNES AND WENDY R. HOOD ...............................................................381

BOOKS

Reviews ................................................................................................................................384

Marine Mammal Sensory Systems. J. A. Thomas, R. A. Kastelein and
A. Ya. Supin, eds. Plenum Press Publishing Corp., New York.
Reviewed by David E. Gaskin.

The Bowhead Whale. J. J. Burns, J. J. Montague and C. J. Cowles, eds.
Special Publication Number 2, The Society for Marine Mammalogy, Lawrence, KS.
Reviewed by John L. Bannister.

Recent publications ................................................................................................................389

Behavioral responses of East Australian humpback whales Megaptera novaeangliae
to biopsy sampling.
M. R. BROWN, P. J. CORKERON, P. T. HALE, K. W. SCHULTZ
AND M. M. BRYDEN .........................................................................................................391

Echolocation rates of two harbor porpoises (Phocoena phocoena).
TOMONARl AKAMATSU, YOSHIMI HATAKEYAMA,
TAKAHITO KOJIMA AND HIDEO SOEDA .....................................................................401

A comparison of some cyclohexamine based drug combinations for chemical
restraint of southern elephant seals (Mirounga leonina).
RUPERT WOODS, STUART MCLEAN, STEWART NICOL
AND HARRY BURTON .....................................................................................................412

Concentrations of estrone sulfate and progesterone in plasma and saliva, vaginal cytology,
and bioelectric impedance during the estrous cyde of the Hawaiian monk seal
(Monachus schauinslandi).
J. PIETRASZEK AND S. ATKINSON ...............................................................................430

Interactions between South African fur seals and the purse-seine fishery.
PATTI WICKENS ...............................................................................................................442

NOTES

Occurrence and distribution of Pacific white-sided dolphins (Lagenorhynchus
obliquidens) in southeastern Alaska, with notes on an attack by killer whales (Orcinus orca)
M. E. DAHLHEIM AND R. G. TOWELL ...........................................................................458

Sightings of the Clymene dolphin (Stenella clymene) in the Gulf of Mexico.
KEITH D. MULLIN, LESLEY V. HIGGINS, THOMAS A. JEFFERSON
AND LARRY J. HANSEN ..................................................................................................464

First record of bottlenose whales, Hyperoodon sp., in the Gulf of California
JORGE URBAN-R., SAUDIEL RAMIREZ-S. AND JUAN C. SALINAS-V. .....................471

Observations of spotted dolphins feeding nocturnally on flying fish.
K. R. RICHARD AND M. A. BARBEAU ...........................................................................473

First record of Mesoplodon densirostris (Cetacea: Ziphiidae) from Rhode Island.
ROBERT NAWOJCHIK .....................................................................................................477

Unusual southern occurrence of a juvenile bearded seal, Erignathus barbatus,
in the St. Lawrence estuary, Canada.
JEAN-FRANCOIS GOSSELIN AND FRANCE BOILY ...................................................480

First record of a sea lion, Zalophus californianus, at Isla del Coco, Costa Rica.
ALEJANDRO ACEVEDO-GUTIERREZ ............................................................................484

Swimming kinematics of a harbor porpoise (Phocoena phocoena) and an Atlantic
white-sided dolphin (Lagenorhynchus acutus).
KRISTINA CURREN, NEIL BOSE AND JOHN LIEN ......................................................485

Experimental recovery of sea otter carcasses at Kodiak Island, Alaska, following the
Exxon Valdez oil spill.
ANTHONY R. DEGANGE, ANGELA M. DOROFF AND DANIEL H. MONSON .........492

Object carrying in a captive beluga whale (Delphinapterus leucas) as possible
surrogate behavior.
SHERRIE S. KILBORN ......................................................................................................496

BOOKS

Reviews ................................................................................................................................502

Antarctic Seals. Research Methods and Techniques. R. M. Laws, ed. Cambridge
University Press, Cambridge.
Reviewed by N. J. Lunn.

Marine Mammals: Advances in Behavioural and Population Biology. I. L. Boyd, ed.
1993. Symposium of the Zoological Society of London, 66. Claredon Press, Oxford.
Reviewed by Ian Stirling.

INDEX .................................................................................................................................507