Results 11 to 20 of about 682 (168)

δ15N and δ13C cycles in narwhal (Monodon monoceros) embedded teeth reveal seasonal variation in ecology and/or physiology [PDF]

Royal Society Open Science
Monitoring Arctic marine mammals in response to rapid climate change requires reliable longitudinal data. To obtain such data is challenging, but sequential measurements of stable isotopes (SI) from metabolically inert tissues like dentine allow for ...
Shu-Ting Zhao, Cory J. D. Matthews, Cortney A. Watt   +2 more
doaj   +2 more sources

Divergent migration routes reveal contrasting energy-minimization strategies to deal with differing resource predictability [PDF]

Movement Ecology, 2023
Background Seasonal long-distance movements are a common feature in many taxa allowing animals to deal with seasonal habitats and life-history demands. Many species use different strategies to prioritize time- or energy-minimization, sometimes employing ...
Courtney R. Shuert, Nigel E. Hussey, Marianne Marcoux, Mads Peter Heide-Jørgensen, Rune Dietz, Marie Auger-Méthé   +5 more
doaj   +2 more sources

Contrasting new and available reference genomes to highlight uncertainties in assemblies and areas for future improvement: an example with monodontid species [PDF]

BMC Genomics, 2023
Background Reference genomes provide a foundational framework for evolutionary investigations, ecological analysis, and conservation science, yet uncertainties in the assembly of reference genomes are difficult to assess, and by extension rarely ...
Trevor T. Bringloe, Geneviève J. Parent
doaj   +2 more sources

Narwhal acoustic presence in Eclipse Sound, Nunavut: relationships with sea ice and responses to ships [PDF]

Scientific Reports
The Arctic Ocean is undergoing rapid sea ice loss and increasing ship traffic, introducing potential stressors for wildlife and challenges for management and conservation.
Jack P. Ewing, Eva Hidalgo-Pla, Alba Solsona-Berga, Kaitlin E. Frasier, Alex J. Ootoowak, Kristin H. Westdal, Sean M. Wiggins, John A. Hildebrand, Joshua M. Jones   +8 more
doaj   +2 more sources

2D to 3D: Exploring Variation of Niche Dimensionality Across Consumers in a Coastal Arctic Ecosystem and Implications on Interpretation [PDF]

Ecology and Evolution, Volume 16, Issue 5, May 2026.
We compared the traditional two‐dimensional (2D: δ13C and δ15N) isotopic niches with a three‐dimensional (3D: δ13C, δ15N, and δ34S) framework to evaluate changes in niche size and overlap. Overall, invertebrates and benthic‐associated species showed greater changes in niche size and reduced overlap using the 3D approach.
Paloma C. Carvalho, Kelsey F. Johnson, Kyle H. Elliott, Steven H. Ferguson, Aaron T. Fisk, H. Grant Gilchrist, Kevin J. Hedges, Oliver P. Love, C. J. Mundy, Andrea Niemi, Wesley R. Ogloff, Bruno Rosenberg, Cortney A. Watt, David J. Yurkowski   +13 more
wiley   +2 more sources

Behavioural analysis of multi-year satellite telemetry data provides insight into narwhal (Monodon monoceros) winter prey selection in Baffin Bay. [PDF]

PLoS ONE
Narwhals (Monodon monoceros) are deep-diving Arctic cetaceans that migrate seasonally between summering and wintering grounds. The Baffin Bay population overwinters in southern Baffin Bay and Davis Strait, where they are known to forage on high-energy ...
Claire A Hornby, Ron R Togunov, Brett T McClintock, Cortney A Watt   +3 more
doaj   +2 more sources

Massive MIMO joint beamforming and power allocation via LMS with narwhal lemming optimization and fractional ResNeXt-based control [PDF]

Scientific Reports
Nowadays, next-generation wireless communication networks are used to provide robust and accurate sensing capability, high-quality wireless connections using massive devices, and support high data transmission rates.
Mian Muhammad Kamal, Luo Yinsheng, Tianjun Ma, Husam S. Samkari, Mohammed F. Allehyani, Muhammad Sheraz, Muhammad Hanif Ahmed Khan Khushik, Mohammad Qatawneh, Teong Chee Chuah   +8 more
doaj   +2 more sources

Skull ecomorphological variation of narwhals (Monodon monoceros, Linnaeus 1758) and belugas (Delphinapterus leucas, Pallas 1776) reveals phenotype of their hybrids. [PDF]

PLoS ONE, 2022
Narwhals and belugas are toothed whales belonging to the Monodontidae. Belugas have a circumpolar Arctic and sub-Artic distribution while narwhals are restricted to the Atlantic Arctic.
Deborah Vicari, Eline D Lorenzen, Mikkel Skovrind, Paul Szpak, Marie Louis, Morten T Olsen, Richard P Brown, Olivier Lambert, Giovanni Bianucci, Richard C Sabin, Carlo Meloro   +10 more
doaj   +2 more sources

Genomic Insights Into the Evolutionary History of Berardius Beaked Whales: Speciation Driven by Resource Specialization, Gigantism and Thermal Barriers? [PDF]

Molecular Ecology, Volume 35, Issue 12, June 2026.
ABSTRACT Understanding the diversity of our oceans is fundamental now more than ever as climate change and human activities put increasing pressure on marine species and ecosystems. Beaked whales (family Ziphiidae) are among the most poorly understood marine mammals, in part due to their affinity to offshore underwater canyons and prolonged diving ...
Morgan L. McCarthy, Michael V. Westbury, Mark S. Springer, John Gatesy, Morten Tange Olsen, Phillip A. Morin   +5 more
wiley   +2 more sources

Diverging Food Web Functioning Around Southampton Island, Nunavut: The Influence of Primary Production Supply and Bathymetry [PDF]

Ecology and Evolution, Volume 16, Issue 4, April 2026.
Southampton Island hosts two distinct benthic sub‐webs, north and south. North is deeper, phytoplankton‐driven; South is shallower, more ice‐algae driven. North benthos: bottom‐up control, four trophic levels including apex predators. South benthos: walrus top‐down control, trophic truncation to three levels.
Rémi Amiraux, C. J. Mundy, Marie Pierrejean, Philippe Massicotte, Steven H. Ferguson, Aaron T. Fisk, Les N. Harris, Kevin J. Hedges, Kelsey F. Johnson, Andrea Niemi, Bruno Rosenberg, Wesley R. Ogloff, Cortney A. Watt, David J. Yurkowski   +13 more
wiley   +2 more sources