Results 61 to 70 of about 1,178 (171)

Larger body size leads to greater female beluga whale ovarian reproductive activity at the southern periphery of their range

Ecology and Evolution, 2021
Identification of phenotypic characteristics in reproductively successful individuals provides important insights into the evolutionary processes that cause range shifts due to environmental change.
Steven H. Ferguson, David J. Yurkowski, Justine M. Hudson, Tera Edkins, Cornelia Willing, Cortney A. Watt   +5 more
doaj   +1 more source

Intraspecific variation of cochlear morphology in bowhead and beluga whales

The Anatomical Record, Volume 309, Issue 6, Page 1514-1529, June 2026.
Abstract The bony labyrinth of the petrosal bone, a distinctive feature of mammal skulls, is often identified in micro‐computed tomography imaging to infer species' physiological and ecological traits. When done as part of a comparative study, one individual specimen is normally considered representative of a species, and intraspecific variation is ...
John Peacock, J. G. M. Thewissen
wiley   +1 more source

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

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   +1 more source

Feces DNA analyses track the rehabilitation of a free-ranging beluga whale

Scientific Reports, 2022
Following the sudden appearance, and subsequent efforts to support the survival of a beluga whale (Delphinapterus leucas) speculated to have been previously trained off the coast of Norway, we investigate the animal’s ability to readapt to life in the ...
Babett Günther, Eve Jourdain, Lindsay Rubincam, Richard Karoliussen, Sam L. Cox, Sophie Arnaud Haond   +5 more
doaj   +1 more source

Genetic and Ecological Divergence Between Northwest Atlantic Killer Whale Populations

Ecology and Evolution, Volume 16, Issue 5, May 2026.
Killer whale (Orcinus orca) populations exhibit substantial genetic, ecological, and morphological differences across their global distribution. In this study, we use whole‐genome resequencing and compound‐specific stable isotope analysis of amino acids to show concurrent genetic and ecological differentiation in two relatively understudied killer ...
Caila E. Kucheravy, Evelien de Greef, Steven H. Ferguson, Cortney A. Watt, Jack W. Lawson, Jeremy J. Kiszka, Colin J. Garroway, Cory J. D. Matthews   +7 more
wiley   +1 more source

Diving behaviour of adult male white whales (Delphinapterus leucas) in Svalbard, Norway

Polar Research, 2019
White whales (Delphinapterus leucas) in Svalbard remain near the coast much of the year, spending most of their time in front of tidewater glaciers. In this article, the diving behaviour of adult male white whales in Svalbard (N = 16) is presented based ...
Jade Vacquié-Garcia, Christian Lydersen, Kit M. Kovacs   +2 more
doaj   +1 more source

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

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   +1 more source

Element concentrations in tissues reveal spatial structure of Atlantic walrus management stocks

The Journal of Wildlife Management, Volume 90, Issue 4, May 2026.
Differences in tissue element concentrations confirm geographic differentiation between 2 of Canada's walrus management stocks but reveal additional spatial structure within the largest stock that may have management implications. Abstract Ensuring harvested animal populations are managed at appropriate scales requires an understanding of underlying ...
Alexander M. Jardine, Jennifer F. Provencher, Mary Gamberg, Cory J. D. Matthews   +3 more
wiley   +1 more source

Choroid plexus papilloma in a beluga whale ( Delphinapterus leucas ) [PDF]

Journal of Veterinary Diagnostic Investigation, 2016
We report herein a choroid plexus papilloma in a beluga whale ( Delphinapterus leucas). This case was positive for choroid plexus tumor marker Kir7.1 on immunohistochemistry. These results and the high conservation of Kir7.1 across species at the amino acid sequence level strongly suggest that antibodies directed against Kir7.1 not only can be employed
Christian, Thomas, June, Mergl, Erica, Gehring, Werner, Paulus, Daniel, Martineau, Martin, Hasselblatt   +5 more
openaire   +2 more sources

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

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   +1 more source