An ocean-basin-wide mark-recapture study of the North Atlantic humpback
whale (Megaptera novaeangliae)
T. D. Smith, J. Allen, P. J. Clapham, P. S. Hammond, S. Katona, F. Larsen,
J. Lien, D. Matilla, P. J. Palsbøll, J. Sigurjónsson, P. T. Stevick and
N. Øien ......................................................................................................................   1

Sperm whale distributions and community ecology associated with a warm-core ring
off Georges Bank
R. B. Griffin ...............................................................................................................   33

Hematology values of wild harbor porpoises (Phocoena phocoena) from the Bay of
Fundy
H. N. Koopman, A. J. Westgate and A. J. Read ........................................................   52

The effect of vessel noise on the vocal behavior of belugas in the St. Lawrence River
estuary, Canada
V. Lesage, C. Barrette, M. C. S. Kingsley and B. Sjare .............................................   65

Behavioral response of four species of balaenopterid whales to biopsy sampling
J. Gauthier and R. Sears ............................................................................................   85

Behavioral sampling methods for cetaceans: A review and critique.
J. Mann .....................................................................................................................  102

Elements in liver tissues of bowhead whales (Balaenoptera mysticetus).
C. A. Krone, P. A. Robisch, K. L. Tilbury, J. E. Stein, E. A. Mackey, P. R. Becker,
T. M. O'Hara and L. M. Philo.....................................................................................  123

Counts of California sea lion (Zalophus californianus) pups from aerial color
photographs and from the ground: A comparison of two methods.
M. S. Lowry ..............................................................................................................  143

Demography and breeding biology of a small, localized population of southern elephant
seals (Mirounga leonina).
F. Galimberti and Luigi Boitani ....................................................................................  159

Female reproductive patterns and fetal growth in Atlantic walruses (Odobenus
rosmarus rosmarus) in Foxe Basin, Northwest Territories, Canada.
J. L. Garlich-Miller and R. E. A. Stewart .....................................................................  179

NOTES

Acoustic observations of Arnoux's bealed whale (Berardius arnuxii) off Kemp Island,
Antarctica.
T. L. Rogers and S. M. Brown ...................................................................................  192

Vocal response of long-finned pilot whales (Globicephala melas) to military sonar in
the Ligurian Sea.
L. E. Rendell and J. C. D. Gordon ..............................................................................  198

Whale riding behavior: Assisted transport for bowhead whale calves during spring
migration in the Alaskan Beaufort Sea.
B. Würsig, W. R. Koski and W. J. Richardson ............................................................  204

Evidence of a feeding aggregation of humpback whales (Megaptera novaeangliae)
around Kodiak Island, Alaska.
J. M. Waite, M. E. Dahlheim, R. C. Hobbs, S. A. Mizroch, O. v. Ziegesar-Matkin,
J. M. Straley, L. M. Herman and J. Jacobson ..............................................................  210

Benthic foraging on stingrays by killer whales (Orcinus orca) in New Zealand waters.
I. Visser ......................................................................................................................  220

First record of an albino bottlenose dolphin (Tursiops truncatus) in the Gulf of Mexico,
with a review of anomalously white cetaceans.
D. Fertl, L. T. Pusser and J. J. Long ............................................................................  227

Anesthesia of juveile Pacific harbor seals using propofol alone and in combination with
isoflurane.
F. M. D. Gulland, M. Haulena, S. Elliot, S. Thornton and L. Gage ...............................  234

Incipient breeding colony of Guadalupe fur seals at Isla Benito del Este, Baja
California, Mexico.
M. O. Maravilla-Chavez and M. S. Lowry .................................................................  239

Reversible anesthesia of Atlantic walruses (Odobenus rosmarus rosmarus) with
carfentanil antagonized with naltrexone.
C. Lanthier, R. E. A. Stewart and E. W. Born ............................................................  241

Comparison of the capabilities of dugongs and West Indian manatees to masticate
seagrasses.
H. Marsh, C. A. Beck and T. Vargo ..........................................................................  250

LETTERS ..................................................................................................................  256

MEMORIES:

John Hernage Prescott ................................................................................................. 259
Frank Thomas Awbrey ................................................................................................ 262
Deaths Reported .........................................................................................................  266

GUIDE FOR AUTHORS............................................................................................  267

Age, growth, and reproductive patterns of Dall's porpoise, (Phocoenoides dalli) in
the central North Pacific Ocean
R. C. Ferrero and W. A Walker ...............................................................................273

Dietary studies of marine mammals using stable carbon and nitrogen isotopic rations
of teeth.
J. L. Walker and S. A. Macko .................................................................................314

The diets of modern and historic bottlenose dolphin populations reflected trhough
stable isotopes.
J. L. Walker, C. W. Potter and S. A. Macko ............................................................335

Retinal topography and visual acuity in the riverine tucuxi (Sotalia fluviatilis).
A. M. Mass and A. Ya. Supin ...................................................................................351

Occurrence, distribution, site fidelity, and school size of botlenose dolphins
(Tursiops truncatus) off San Diego.
R. H. DeFran and  D. W. Weller...............................................................................366

Range characteristics of Pacific coast bottlenose dolphins (Tursiops truncatus) in
the Southern California Bight.
R. H. DeFran, D. W. Weller, D. L. Kelly and M. A. Espinosa....................................381

Local abundance and distribution of bottlenose dolphins (Tursiops truncatus) in
the nearshore waters of Virginia Beach, Virginia.
S. G. Barco, W. M. Swingle, W. A. McLellan, R. N. Harris and D. A. Pabst.............394

Skin swabbing for genetic analysis: Application to dusky dolphin
(Lagenorhynchus obscurus)
A. D. Harlin, B. Würsig, C. S. Baker and T. M. Markowitz .......................................409

Diel variation in migration rates of eastern Pacific gray whales measured with
thermal imaging sensors.
W. L. Perryman, M. A. Donahue, J. L. Laake and T. E. Martin .................................426

Pinniped population dynamics in central California: Correlations with sea surface
temperature and upwelling indices.
W. J. Sydeman and S. G. Allen ................................................................................446

Steller sea lion status and trend in Southeast Alaska: 1979-1997.
D. G. Calkins, D. C. McAllister, K. W. Pitcher and G. W. Pendleton .......................462

Distribution and population size of the southern sea lion (Otaria flavescens) in
central and southern Chubut, Patagonia, Argentina.
L. M. Reyes, E. A. Crespo and V. Szapkievich .......................................................478

Monitoring the trend of harbor seals in Prince William Sound, Alaska, after the
Exxon Valdez oil spill.
K. J. Frost, L. F. Lowry and J. M. Ver Hoef ...........................................................494

Agonistic behavior in harbor seals (Phoca vitulina) in relation to the availability
of haul-out space.
D. R. Neumann .......................................................................................................507

NOTES

A portable broadband data acquisition system for field studies in bioacoustics.
W. W. L. Au, M. O. Lammers and R. Aubauer.......................................................526

Sightings and possible identity of a bottlenose whale in the tropical Indo-Pacific:
Indopacetus pacificus?
R. L. Pitman, D. M. Palacios, P. L. R. Brennan, B. J. Brennan, K. C. Balcomb III
and  T. Miyashita ...................................................................................................531

Distribution of dolphins in Galápagos waters.
S. D. Smith and H. Whitehead ...............................................................................550

Mitochondrial DNA used to identify an extralimital beluga whale (Delphinapterus
leucas)  from Nova Scotia as originating from the St. Lawrence population.
J. G. B. Gladden, P. F. Brodie and J. W. Clayton ..................................................556

Behavior of a humpback whale (Megaptera novaeangliae) upon entanglement
in a gill net.
M. Weinrich ..........................................................................................................559

Predation on a white shark (Carcharodon carcharias) by a killer whale (Orcinus
orca) and a possible case of competitive displacement.
P. Pyle, M. J. Schramm, C. Keiper and S. D. Anderson .........................................563

Lethal tiger shark (Galeocerdo cuvier) attack on a bottlenose dolphin (Tursiops sp.)
calf: Defense and reactions by the mother.
J. Mann and H. Barnett ..........................................................................................568

Age-related changes in hematocrit, hemoglobin, and plasma protein in Juan
Fernandez fur seals (Arctocephalus philippii).
M. S. Sepúlveda, H. Ochoa-Acuña and B. L. Homer .............................................575

Notes on the southernmost records of the Guadalupe fur seal, Arctocephalus
townsendi, in Mexico.
D. Aurioles-Gamboa, C. J. Hernández-Camacho and E. Rodríguez-Krebs .............581

A remote release mechanism to recover time-depth recorders from marine
mammals.
M. O. Hammill, V. Lesage, G. Lobb, P. Carter and F. Voegeli ...............................584

Quality of satellite telemetry locations of gray seals (Halichoerus grypus).
A.-M. Goulet,  M. O. Hammill and C. Barrette .......................................................589

Ringed seal (Phoca hispida) breeding in the drifting pack ice of the Barents Sea.
O. Wiig, A. E. Derocher and S. E. Belikov .............................................................595

Interactions between northern elephant seals and vehicles near Point Piedras
Blancas, California.
B. B. Hatfield and G. B. Rathbun ............................................................................598

The application of immuno-assays for seriological detection of morbillivirus
exposure in free ranging harbor seals (Phoca vitulina) and sea otters (Enhydra
lutris) from the western coast of the United States.
K. D. Ham-Lammé, D. P. King, B. C. Taylor, C. House, D. A. Jessup,
S. Jeffries, P. K. Yochem, F. M. D. Gulland, D. A. Ferrick and J. L. Stott ..............601

Use of the remote Sahul Banks, northwestern Australia, by dugongs, including
breeding females.
S. D. Whiting .........................................................................................................609

MEMORIES

David Edward Gaskin ............................................................................................616

Phylogenetic relationships among the delphinid cetaceans based on full
cytochrome b sequences
R. G. LeDuc, W. F. Perrin and A. E. Dizon ...........................................................619

Gastrointestinal helmiths of the dusky dolphin, Lagenorhynchus obscurus
(Gray, 1828), off Patagonia, in the southwestern Atlantic.
S. L. Dans, L. M. Reyes, S. N. Pedraza, J. A. Raga and E. A. Crespo ...................649

Has the age at transition of Southern Hemisphere minke whales declined
over recent decades?
R. B. Thomson, D. S. Butterworth and H. Kato ......................................................661

Extimating body length of pygmy right whales (Caperea marginata) from
measurements of the skeleton and baleen.
C. M. Kemper and P. Leppard ..............................................................................683

Genetic basis and evolutionary significance of ventral skin color markings in
North Atlantic right whales (Eubalaena glacialis).
C. M. Schaeff and P. K. Hamilton ..........................................................................701

Stomach contents of false killer whales (Pseudorca crassidens) stranded on the
coasts of the Strait of Magellan, Tierra del Fuego.
M. K. Alonso, S. N. Pedraza, A. C. M. Schiavini, R. N. P. Goodall and
E. A. Crespo .........................................................................................................712

Age-length relationships in humpback whales: a comparison of strandings in
the western North Atlantic with commercial catches.
P. T. Stevick ..........................................................................................................725

Responses by Hector's dolphins to boats and swimmers in Porpoise Bay,
New Zealand.
L. Bejder, S. M. Dawson and H. A. Harraway ......................................................738

Mother-infant spatial relations in captive bottlenose dolphins, Tursiops truncatus.
C. Gubbins, B. McGowan, S. K. Lynn, S. Hooper and D. Reiss ............................751

Using trend indices for endangered species.
L. L. Eberhardt, R. A. Garrott and B. L. Becker ....................................................766

Body size, survival and decline of juvenile Hawaiian monk seals,
Monachus schauinslandi.
M. P. Craig and T. J. Ragen ..................................................................................786

Adrenal function in wild and rehabilitated Pacific harbor seals (Phoca vitulina
richardii) and in seals with phocine herpesvirus-associated adrenal necrosis.
F. M. D. Gulland, M. Haulena, L. J. Lowenstine, C. Munro, P. A. Graham,
J. Bauman and J. Harvey .......................................................................................810

NOTES

Abundance of dusky dolphins (Lagenorhynchus obscurus) off north and central
Pagatonia, Argentina, in spring and a comparison with incidental catch in fisheries.
A. Schiavini, S. N. Pedraza, E. A. Crespo, R. Gonzalez and S. L. Dans .................828

Preliminary results of a photoidentification study of the marine tucuxi,
Sotalia fluviatilis, in southern Brazil.
P. A. C. Flores .....................................................................................................840

Mass mortality of Atlantic spotted dolphins (Stenella frontalis) caused by a
fishing interaction in Mauritania.
M. Nieri, E. Grau, B. Lamarche and A. Aguilar .....................................................847

A lactating record-age St. Lawrence beluga (Delphinapterus leucas).
D. F. McAlpine, M. C. S. Kingsley, and P.-Y. Daqust ..........................................854

Sharksucker (Echeneis naucrates) on a bottlenose dolphin (Tursiops truncatus)
and a review of other cetacean-remora associations.
D. Fertl and A. M. Landry, Jr. ..............................................................................859

A period of human contact by two free-ranging bottlenose dolphins
(Tursiops truncatus).
C. J. Wood .........................................................................................................863

Estimating total kill of Northwest Atlantic harp seals, 1994-1998.
D. M. Lavigne .....................................................................................................871

Observations of parturition in the Mediterranean monk seal (Monachus
monachus).
J. F. Layna, M. A. Cedenilla, F. Aparicio, and L. M. Gonzalez ............................879

Premature pupping in Antarctic fur seals (Arctocephalus gazella).
D. J. McCafferty .................................................................................................882

Observations of a Guadalupe fur seal (Arctocephalus townsendi) female
and pup at San Miguel Island, California.
S. R. Melin and R. L. DeLong .............................................................................885

Predation by a Hooker's sea lion (Phocarctos hookeri) on a small
population of fur seals (Arctocephalus spp.) at Macquarie Island.
S. Robinson, L. Wynen and S. Goldsworthy ...................................................... 888

A method for calibrating swim-speed recorders.
S. B. Blackwell, C. A. Haverl, B. J. Le Boeuf, and D. P. Costa ..........................894

LETTERS ........................................................................................................ 906

Recollections of Kenneth S. Norris, edited by Sam H. Ridgway
G.K. Silber ......................................................................................................915
G. Carleton Ray................................................................................................
S.H. Ridgway ...................................................................................................
R.L. Gentry ......................................................................................................
R.S. Wells .......................................................................................................
B. Wursig ........................................................................................................
R. Connor .......................................................................................................
S.L. Swartz .....................................................................................................
R.L. Brill .........................................................................................................
T. Cranford .....................................................................................................
T. Newberry ...................................................................................................
S. Brownlee ....................................................................................................
D.P. Costa .....................................................................................................

Bibliography of Kenneth S. Norris.
D. P. Costa and W.F. Perrin........................................................................... 947

A new abundance estimate for vaquitas: first step for recovery.
A.M Jaramillo-Legorreta,  L. Rojas-Bracho and T. Gerrodette.........................957

Risk factors affecting the vaquita (Phocoena sinus).
L. Rojas-Bracho and B.L. Taylor.................................................................... 974

Mitochondrial DNA variation in the critically endangered vaquita
Phocoena sinus Norris and Macfarland, 1958.
P.E. Rosel and L. Rojas-Bracho..................................................................... 990

Examining the risk of inbreeding depression in a naturally rare cetacean,
the vaquita (Phocoena sinus).
B. L. Taylor and L. Rojas-Bracho.................................................................1004

Spinner dolphins (Stenella longirostris) of the western Pacific and
southeast Asia: pelagic and shallow-water forms.
W. F. Perrin, Ma. Louella L. Dolar, and D. Robineau......................................029

Behavioral aspects of sleep in Pacific white-sided dolphins
(Lagenorhynchus obliquidens, Gill 1865).
P. D. Goley...................................................................................................1054

Diurnal behavior of free-ranging bottlenose dolphins in the Kvarneric
(northern Adriatic Sea).
Bearzi, G., E. Politi, and G. Notarbartolo di Sciara.   1065

Long distance offshore movements of bottlenose dolphins.
Wells, R.S., H.L. Rhinehart, P. Cunningham, J. Whaley, M. Baran,
C. Koberna and D.P. Costa.   1098

Population analyses of Indo-Pacific humpback dolphins Sousa chinensis
in Algoa Bay, Eastern Cape, South Africa. .
Karczmarski, L., P.E.D. Winter, V.G. Cockcroft, and A. McLachlan.....1115

Biases in dolphin age structure due to age estimation technique.
Hohn, A.A., and S. Fernandez. 1124

The sperm whale's nose: sexual selection on a grand scale.
Cranford, T.W.   1133

Sperm whale surface activity from tracking by radio and satellite tags. .
Watkins, W.A., M.A. Daher, N.A. DiMarzio, A. Samuels,
D. Wartzok, K.M. Fristrup, D.P. Gannon, P.W. Howey,
R.R. Maiefski and T.R. Spradlin.   1158

Variation in the visually observable behavior of groups of
Galapagos sperm whales. .
Whitehead, H.  1181

Heart rate and electrocardiogram characteristics of a young
California gray whale (Eschrichtius robustus).
Poonganis, P.J. and G.L. Kooyman. 1198.

Gray whales (Eschrichtius robustus) off Sakhalin Island, Russia:
Seasonal and annual patterns of occurrence.
Weller, D.W., B. Wursig, A.L. Bradford, A.M. Burdin,
S.A. Blokhin, H. Minakuchi, and R.L. Brownell, Jr. ..................................1208

Why do baleen whales migrate?
Corkeron, P.J. and R.C. Connor 1228

Movements of North Pacific blue whales during the feeding
season off southern California and their southern fall migration.
Mate, B.R., B.A. Lagerquist, and J. Calambokidis. 12??

An acoustic link between blue whales in the eastern tropical
Pacific and the northeast Pacific. .
Stafford, K.M., S.L. Nieukirk, and C.G. Fox.  1258

Phylogenetic relationships of Bryde's whales in the western North
Pacific and adjacent waters inferred from mitochondrial DNA sequences.
Yoshida, H. and H. Kato.  1269

Relative abundance of large whales around South Georgia (1979-1998)
Moore, M.J., S.D. Berrow, B.A. Jensen, P. Carr, R. Sears,
V.J. Rowntree, R.Payne, and P.K. Hamilton.      1287

Dark adaptation and visual sensitivity in shallow and deep-diving pinnipeds.
Levenson, D.H., and R.J. Schusterman.  1303

Biological observations on Stejneger's beaked whale, Mesoplodon
stejnegeri, from strandings on Adak Island, Alaska.
Walker, W.A. and M.B. Hanson.  1314

Long-term site fidelity and possible long-term associations of wild
spinner dolphins (Stenella longirostris) seen off Oahu, Hawaii.
Marten, K. and S. Psarakos. 1329

First record of movement of a southern right whale (Eubalaena
australis) between warm water breeding grounds and the Antarctic
Ocean, south of 60 degrees South. 
Banniseter, J.L., L.A. Pastene, and S.R. Burnell. 1337

Head-butting in northern bottlenose whales (Hyperoodon ampullatus):
a possible function for big heads? 
Gowans, S. and L. Rendell. 1342

An "acoustic niche" for Antarctic killer whale and leopard seal sounds.
Mossbridge, J.A. and J.A. Thomas.1351

Age structure and reproductive rates of ringed seals (Phoca hispida)
on the northwestern coast of Hudson Bay in 1991 and 1992.
Holst, M., I. Stirling, and W. Calvert.1357

Regulation of coronary blood flow in ringed seals: the histochemical evidence.
Ostholm, T. and R. Elsner. 1365

Stones in the stomachs of southern elephant seals.
Bryden, M.M.  1370