Results 21 to 30 of about 2,545 (207)

Satellite imagery survey of beluga whales in the Severn and Winisk River estuaries

Arctic Science
Very high resolution (VHR) satellite imagery has expanded the scale at which researchers can monitor marine mammal species in Arctic and subarctic regions.
Jordan B. Stewart, Marianne Marcoux, Cortney A. Watt   +2 more
doaj   +2 more sources

High-Accuracy Photovoltaic Power Prediction under Varying Meteorological Conditions: Enhanced and Improved Beluga Whale Optimization Extreme Learning Machine

Energies
Accurate photovoltaic (PV) power prediction plays a crucial role in promoting energy structure transformation and reducing greenhouse gas emissions. This study aims to improve the accuracy of PV power generation prediction. Extreme learning machine (ELM)
Wei Du, Shi-Tao Peng, Pei-Sen Wu, Ming-Lang Tseng   +3 more
doaj   +2 more sources

Improving medical image classification based on Boosted Beluga Whale Optimizer with Triangular Mutation and Cross Vision transformer models

Egyptian Informatics Journal
In this study, we introduce a framework for medical image classification that combines deep learning models with modified Beluga Whale Optimization as a feature selection technique.
Abdelghani Dahou, Mohamed Abd Elaziz, Ahmad O. Aseeri, Ahmed A. Ewees, Mohammed A.A. Al-qaness, Rehab Ali Ibrahim   +5 more
doaj   +2 more sources

Genome Sequence of an Alphaherpesvirus from a Beluga Whale (<i>Delphinapterus leucas</i>). [PDF]

Genome Announc, 2017
Beluga whale alphaherpesvirus 1 was isolated from a blowhole swab taken from a juvenile beluga whale. The genome is 144,144 bp in size and contains 86 putative genes. The virus groups phylogenetically with members of the genus Varicellovirus in subfamily
Davison AJ, Nielsen O, Subramaniam K, Jacob JM, Romero CH, Burek-Huntington KA, Waltzek TB.   +6 more
europepmc   +2 more sources

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

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

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

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