Results 11 to 20 of about 1,799 (175)

Estimating reproductive and juvenile survival rates when offspring ages are uncertain: A novel multievent mark‐resight model with beluga whale case study

Methods in Ecology and Evolution, 2023
Understanding the survival and reproductive rates of a population is critical to determining its long‐term dynamics and viability. Mark‐resight models are often used to estimate these demographic rates, but estimation of survival and reproductive rates ...
Gina K. Himes Boor, Tamara L. McGuire, Amanda J. Warlick, Rebecca L. Taylor, Sarah J. Converse, John R. McClung, Amber D. Stephens   +6 more
doaj   +1 more source

Cementum structure in Beluga whale teeth [PDF]

Acta Biomaterialia, 2017
A large fraction of the volume of Beluga whale (Delphinapterus leucas) teeth consists of cementum, a mineralized tissue which grows throughout the life of the animal and to which the periodontal ligaments attach. Annular growth bands or growth layer groups (GLGs) form within Beluga cementum, and this study investigates GLG structure using X-ray ...
S R, Stock, L A, Finney, A, Telser, E, Maxey, S, Vogt, J S, Okasinski   +5 more
openaire   +2 more sources

Population dynamics of the threatened Cumberland Sound beluga (Delphinapterus leucas) population

Arctic Science, 2021
Current scientific evidence indicates that the threatened Cumberland Sound beluga whale (Delphinapterus leucas (Pallas, 1776)) population is genetically differentiated and spatially segregated from other beluga whale populations. This population has been
Cortney A. Watt, Marianne Marcoux, Steven H. Ferguson, Mike O. Hammill, Cory J.D. Matthews   +4 more
doaj   +1 more source

Machine learning models development for accurate multi-months ahead drought forecasting: Case study of the Great Lakes, North America.

PLoS ONE, 2023
The Great Lakes are critical freshwater sources, supporting millions of people, agriculture, and ecosystems. However, climate change has worsened droughts, leading to significant economic and social consequences.
Mohammed Majeed Hameed, Siti Fatin Mohd Razali, Wan Hanna Melini Wan Mohtar, Norinah Abd Rahman, Zaher Mundher Yaseen   +4 more
doaj   +1 more source

The Electrocardiogram of a Beluga Whale [PDF]

Circulation, 1953
In the course of our study of the comparative anatomy and physiology of the mammalian heart, it became necessary to develop a technic to obtain the electrocardiogram of the largest mammal of all. Because of its availability, the small white Beluga whale in northern waters was the first object of this research, prior to obtaining the record of a large ...
R L, KING, J L, JENKS, P D, WHITE
openaire   +2 more sources

Photographic evidence of tagging impacts for two beluga whales from the Cumberland Sound and western Hudson Bay populations

Arctic Science, 2022
Beluga whale (Delphinapterus leucas (Pallas, 1776)) movements, habitat use, and diving behaviour have been studied using satellite-linked transmitters for decades.
Kasey P. Ryan, Stephen D. Petersen, Steven H. Ferguson, C-Jae C. Breiter, Cortney A. Watt   +4 more
doaj   +1 more source

Improved Beluga Whale Optimization for RFID Network Planning [PDF]

Jisuanji kexue
With the development of radio frequency identification(RFID) technology,the demand for its application is getting higher and higher,and the research in reader deployment is gradually deepening.In order to solve the RFID reader location planning problem ...
CHEN Yijun, ZHENG Jiali, LI Zhiqian, ZHANG Jiangbo, ZHU Xinghong
doaj   +1 more source

Measuring Hearing in Wild Beluga Whales [PDF]

, 2016
We measured the hearing abilities of seven wild beluga whales (Delphinapterus leucas) during a collection-and-release experiment in Bristol Bay, AK. Here we summarize the methods and initial data from one animal and discuss the implications of this experiment. Audiograms were collected from 4 to 150 kHz.
Mooney, T. Aran, Castellote, Manuel, Quakenbush, Lori T., Hobbs, Roderick, Goertz, Caroline, Gaglione, Eric   +5 more
openaire   +3 more sources

Incorporating environmental covariates into a Bayesian stock production model for the endangered Cumberland Sound beluga population

Endangered Species Research, 2022
The Cumberland Sound (CS) beluga (Delphinapterus leucas) population inhabits CS on eastern Baffin Island, Nunavut, Canada, and is listed as threatened under the Canadian Species at Risk Act.
BA Biddlecombe, CA Watt
doaj   +1 more source

Propagation of beluga whale echolocation signals [PDF]

The Journal of the Acoustical Society of America, 1984
The propagation characteristics of high-frequency echolocation signals (peak energies above 100 kHz) of the beluga whale, Delphinapterus leucas were determined by a series of measurements conducted while the animal performed a target-detection task. The whale was trained to station on a “bite-plate” so that its projected beam could be measured in the ...
Whitlow W. L. Au, Ralph H. Penner, Charles W. Turl   +2 more
openaire   +1 more source