Results 51 to 60 of about 6,977 (222)

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

Estimating beluga whale abundance from space: using drones to ground‐validate VHR satellite imagery

Remote Sensing in Ecology and Conservation
Routine monitoring of cetaceans is imperative for understanding their population trends and making informed management decisions. However, the inherent nature of cetaceans and the marine ecosystems they inhabit make annual population surveys logistically
Jordan B. Stewart, Justine M. Hudson, Bryanna A. H. Sherbo, Cortney A. Watt   +3 more
doaj   +1 more source

Abundance of Belugas, Delphinapterus leucas, in Cook Inlet, Alaska, 1994–2000 [PDF]

, 2000
Annual abundance estimates of belugas, Delphinapterus leucas, in Cook Inlet were calculated from counts made by aerial observers and aerial video recordings.
DeMaster, Douglas P., Hobbs, Roderick C., Rugh, David J.   +2 more
core  

Preliminary study of discrimination of human vocal commands in walrus (Odobenus rosmarus divergens) [PDF]

, 2020
Walruses seem to use various acoustic signals in social context. So, the auditory faculty is seems to be important for walruses. Can walruses understand another animals' vocal information using auditory sense?
Ashikari, Harumasa, Endo, Shiho, Imagawa, Asuka, Kawaguchi, Naoki, Murayama, Tsukasa, Shimizu, Yusuke, Suzuki, Tomohiro, Wakai, Yoshihito   +7 more
core  

Fibroleiomyomas of the Tubular Genitalia in Female Beluga Whales [PDF]

Journal of Veterinary Diagnostic Investigation, 2000
Fibroleiomyomas of the tubular genitalia were diagnosed in 6 of 9 adult female beluga whales from the St. Lawrence estuary, Quebec, Canada. These tumors were located in the vagina (6 of 6), the cervix (2 of 6), and the uterus (1 of 6). Endogenous hormones or xeno-estrogens may be implicated in the occurrence of these tumors.
I, Mikaelian, P, Labelle, M, Doré, D, Martineau   +3 more
openaire   +2 more sources

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

River-influenced beluga (Delphinapterus leucas) summer habitat use in western Hudson Bay, Canada

Arctic Science, 2023
River estuaries along western Hudson Bay, Canada, are important summer habitats for beluga whales (Delphinapterus leucus (Pallas, 1776)) and subject to increasing industrial development activities including vessel traffic. The feasibility of establishing
Emma L. Ausen, David G. Barber, Atreya Basu, Jens Ehn, David Walker, Laura Dalman, Marianne Marcoux   +6 more
doaj   +1 more source

Tumors in St. Lawrence Beluga Whales (Delphinapterus leucas) [PDF]

Veterinary Pathology, 1994
A population of 450–500 belugas ( Delphinapterus leucas) resides in the polluted estuary of the St. Lawrence River. Stranded carcasses of this endangered population were recovered and necropsied. High concentrations of organochlorines, heavy metals, and benzo-a-pyrene exposure were demonstrated in tissues of these whales.
S, De Guise, A, Lagacé, P, Béland
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

Early Growth and Developmental Characteristics of Chinese Bahaba (Bahaba taipingensis)

Fishes
The Chinese bahaba (Bahaba taipingensis), belonging to the Sciaenidae family, is one of the largest croakers with a limited geographical distribution. It is a critically endangered fish species according to the IUCN and a protected animal in China.
Lin Yan, Yuanhao Ren, Tongxi Ai, Jianshe Shi, Junjie Wang, Kuoqiu Yan, Keji Jiang   +6 more
doaj   +1 more source