Results 181 to 190 of about 6,977 (222)

Bone Fluoride Concentrations in Beluga Whales from Canada

Journal of Wildlife Diseases, 1999
Beluga whales (Delphinapterus leucas) from the St. Lawrence Estuary have been reported to have dental and bone abnormalities. To determine whether these lesions could be caused by high exposure to fluorides, we measured bone fluoride levels in eight beluga whales stranded on the shores of the St.
I, Mikaelian, C W, Qualls, S, De Guise, M W, Whaley, D, Martineau   +4 more
openaire   +2 more sources

Frequency Tuning of Hearing in the Beluga Whale

2016
Data on frequency tuning in odontocetes are contradictory: different authors have reported filter qualities from 2 to almost 50. In this study, frequency tuning was measured in a beluga whale (Delphinapterus leucas) using a rippled-noise test stimulus in conjunction with the auditory evoked potential (AEP) technique.
Evgeniya V, Sysueva, Dmitry I, Nechaev, Vladimir V, Popov, Alexander Y, Supin   +3 more
openaire   +2 more sources

Whale tear glands in the bowhead and the beluga whales: Source and function

Journal of Morphology, 2020
AbstractOrbital glands are found in many tetrapod vertebrates, and are usually separate structures, consisting of individual glands lying in the eyelids and both canthi of the orbit. In cetaceans, however, the orbital glandular units are less distinct and have been described by numerous authors as a single, periorbital mass. There are few histochemical
Susan J. Rehorek, Rapahela Stimmelmayr, John C. George, Robert Suydam, Denise M. McBurney, JGM Thewissen   +5 more
openaire   +2 more sources

The spiral ganglion and Rosenthal's canal in beluga whales

Journal of Morphology, 2015
ABSTRACTWith the increase of human activity and corresponding increase in anthropogenic sounds in marine waters of the Arctic, it is necessary to understand its effect on the hearing of marine wildlife. We have conducted a baseline study on the spiral ganglion and Rosenthal's canal of the cochlea in beluga whales (Delphinapterus leucas) as an initial ...
Jennifer D, Sensor, Robert, Suydam, John C, George, M C, Liberman, Denise, Lovano, Mary Ann, Rhaganti, Sharon, Usip, Christopher J, Vinyard, J G M, Thewissen   +8 more
openaire   +2 more sources

Phenotyping of beluga whale blood lymphocytes using monoclonal antibodies

Developmental & Comparative Immunology, 1997
Widespread efforts are currently made to classify morphologically indistinguishable lymphocyte subpopulations in several species. In order to increase the knowledge in cetacean immunology, cross-reactivity of antibodies against bovine, human, ovine and mouse cell surface proteins was tested on beluga whale (Delphinapterus leucas) peripheral blood ...
S, De Guise, J, Bernier, D, Martineau, P, Béland, M, Fournier   +4 more
openaire   +2 more sources

Uterine Adenocarcinoma with Abdominal Carcinomatosis in a Beluga Whale

Journal of Wildlife Diseases, 1998
A case of uterine adenocarcinoma is reported in a 26-yr-old, free-ranging beluga whale (Delphinapterus leucas) from the St. Lawrence estuary (Quebec, Canada). This neoplasm appeared as a segmental stenotic thickening of the left uterine horn composed of well differentiated, but disorganized and infiltrative, glandular structures surrounded by an ...
S, Lair, S, De Guise, D, Martineau
openaire   +2 more sources

Regional variability in Mackenzie Inuit beluga whale use

International Journal of Osteoarchaeology, 2002
AbstractInuit of the Mackenzie Delta region, Northwest Territories, relied on a wide range of subsistence resources, however they are best known as the consummate hunters of beluga whales (Delphinapterus leucas). This species represented a focal resource for the two regional groups centred on the East Channel of the Mackenzie River, but was available ...
T. Max Friesen, David Morrison
openaire   +1 more source

Exam Suggestion System Using Beluga Whale Optimization

Concurrency and Computation: Practice and Experience
ABSTRACTIn this study, an exam recommendation system was developed using the Beluga Whale Optimization (BWO) algorithm. The system generates balanced exams by selecting the most appropriate questions from a question bank consisting of approximately 12,285 questions according to difficulty, distinctiveness, and frequency of use in previous exams.
Samet Diri, Selçuk Öğütcü, Remzi Gürfidan, Bekir Aksoy   +3 more
openaire   +1 more source

Beluga whale optimization: A novel nature-inspired metaheuristic algorithm

Knowledge-Based Systems, 2022
Changting Zhong, Gang Li, Zeng Meng
exaly  

Beluga Whale Delphinapterus leucas (Pallas, 1776)

2022
Kasey P. Ryan, Cortney A. Watt
openaire   +1 more source