Results 51 to 60 of about 1,178 (171)

Sensory Biology of the Franciscana (Pontoporia blainvillei, Pontoporiidae, Cetartiodactyla): Ontogenetic Modifications of Vibrissae and Vibrissal Crypts

Integrative Zoology, EarlyView.
The transition of cetaceans from a terrestrial to an aquatic environment involved a crucial sensory adaptation to environments with limited visibility. Vibrissae, important mechanoreceptors, undergo an ontogenetic transformation in odontocetes. This research describes the histomorphology of vibrissae and crypts at different developmental stages ...
Cecilia Mariana Krmpotic, Cleopatra Mara Loza, Alejo Carlos Scarano, Pedro Fernando Andrés‐Laube, Francisco Acuña, Juan Pablo Loureiro, Carolina Natalia Zanuzzi, Nicolás Nahuel Castro, María Teresa Pombo, Lorenzo von Fersen, Claudio Gustavo Barbeito   +10 more
wiley   +1 more source

Revisiting the status of the Arctic's Last Ice Area as a refuge for marine predators

Ecosphere, Volume 17, Issue 7, July 2026.
Abstract The Last Ice Area (LIA), located north of the Canadian Arctic Archipelago and Greenland, has the Arctic's oldest and thickest sea ice. The LIA is hypothesized to be a potential climate refuge for ice‐dependent top predators as Arctic sea ice continues to decline.
Kristin L. Laidre, Axel Schweiger, Jinlun Zhang, Benjamin Cohen, Michael Steele, Steven H. Ferguson, G. W. K. Moore   +6 more
wiley   +1 more source

Alaskan distribution of the Beluga Whale, Delphinapterus leucas

The Canadian field-naturalist, 1978
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Harrison, Craig S., Hall, John D.
openaire   +2 more sources

Balancing Aerobic and Anaerobic Metabolism, and Its Effect on Recovery Time in Freely‐Diving Steller Sea Lions (Eumetopias jubatus)

Marine Mammal Science, Volume 42, Issue 3, July 2026.
ABSTRACT As breath‐hold divers, marine mammals must coordinate their use of both aerobic and anaerobic metabolism to maximize their time at depth. One indication of the relative reliance between these two energy‐producing systems is the aerobic dive limit (ADL), defined as the dive duration where post‐dive blood lactate concentrations surpass resting ...
Aaron S. Purdy, David A. S. Rosen
wiley   +1 more source

Social behaviour of captive belugas, Delphinapterus leucas [PDF]

, 1994
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biology, 1994. ; Vita. ; Includes bibliographical references. ; by Cheri Anne Recchia. ; Ph.D.
openaire   +4 more sources

Harbor Porpoise and Beluga Whale Habitat Use in the Saguenay‐St. Lawrence Marine Park (Canada) Revealed by a Combination of Visual and Acoustic Survey

Marine Mammal Science, Volume 42, Issue 3, July 2026.
ABSTRACT Studying habitat use of cetaceans that spend most of their lives underwater poses challenges, prompting the use of complementary methods. Non‐invasive methods, land‐based surveys (LBS) and passive acoustic monitoring (PAM), were used to characterize occurrence patterns of beluga whales, harbor porpoises, and vessels in the Saguenay–St ...
Coralie Bernier‐Breton, Cristiane C. A. Martins, Gesche Winkler, Pierre Mercure‐Boissonnault, Léna Velé, Pierre Cauchy   +5 more
wiley   +1 more source

Exploring Progesterone Levels and Scaled Mass Index as Predictors of Pregnancy in Free‐Ranging Belugas

Marine Mammal Science, Volume 42, Issue 3, July 2026.
ABSTRACT Monitoring pregnancy rates can provide vital information regarding a population's viability and trajectory. This study combined drone‐based photogrammetry with biopsy darting to determine if the Scaled Mass Index (SMI) estimated from aerial images can be used to identify pregnant, free‐ranging St.
Meredith Sherrill, Limoilou‐Amélie Renaud, Nicholas Kellar, Robert Michaud, Véronique Lesage, Jonathan Verreault   +5 more
wiley   +1 more source

BARTONELLA HENSELAE IN CAPTIVE AND HUNTER-HARVESTED BELUGA (DELPHINAPTERUS LEUCAS) [PDF]

Journal of Wildlife Diseases, 2008
Previously, we reported the isolation of Bartonella henselae from the blood of harbor porpoises (Phocoena phocoena) and loggerhead sea turtles (Caretta caretta) from the North Carolina coast. Hematologic, pathologic, and microbiologic findings surrounding the death of a juvenile captive beluga in Vancouver initiated an outbreak investigation designed ...
Ricardo G, Maggi, Stephen A, Raverty, Sally J, Lester, David G, Huff, Martin, Haulena, Susan L, Ford, Ole, Nielsen, John H, Robinson, Edward B, Breitschwerdt   +8 more
openaire   +2 more sources

Adaptive Acoustic Monitoring for Endangered Cook Inlet Beluga Whales in Complex Soundscapes

Marine Mammal Science, Volume 42, Issue 3, July 2026.
ABSTRACT Effective conservation of the endangered Cook Inlet beluga whale (Delphinapterus leucas) requires comprehensive spatiotemporal data, yet monitoring efforts remain spatially biased, underrepresenting important southern habitats. Passive acoustic monitoring (PAM) provides the necessary broad‐scale coverage, but its expansion introduces ...
Manuel Castellote, Rahul Dodhia, Daniela Ruiz, Zhongqi Miao, Pablo Arbelaez, Verena Gill, Lori Polasek, Juan M. Lavista Ferres   +7 more
wiley   +1 more source

True Hermaphroditism in a St. Lawrence Beluga Whale (Delphinapterus leucas) [PDF]

Journal of Wildlife Diseases, 1994
A hermaphrodite beluga whale (Delphinapterus leucas) was found in the St. Lawrence Estuary, Québec, Canada. This animal had two testicles, two separate ovaries, and the complete ducts of each sex; cervix, vagina and vulva were absent. Mature spermatozoa were found in the lumen of seminiferous tubules in the testicles, and numerous involuted corpora ...
S, De Guise, A, Lagacé, P, Béland
openaire   +2 more sources