Results 41 to 50 of about 6,438 (222)

Relation between beluga whale aggregations and sea temperature on climate change forecasts

Frontiers in Marine Science
Climate change has been shown to alter the spatial distribution of whales and other marine mammals. Fast changing ocean temperatures may also affect the spatial distribution of whales at a finer scale, namely within populations, including aggregation ...
Marga L. Rivas, Emilio Guirado, Zaida Ortega   +2 more
doaj   +1 more source

Fatty acid‐based diet estimates suggest ringed seal remain the main prey of southern Beaufort Sea polar bears despite recent use of onshore food resources

Ecology and Evolution, 2020
Polar bears (Ursus maritimus) from the southern Beaufort Sea (SB) subpopulation have traditionally fed predominantly upon ice‐seals; however, as the proportion of the subpopulation using onshore habitat has recently increased, foraging on land‐based ...
Jennifer Bourque, Todd C. Atwood, George J. Divoky, Connie Stewart, Melissa A. McKinney   +4 more
doaj   +1 more source

Beluga (Delphinapterus leucas) response to personal watercraft and motorized whale watching vessels in the Churchill River estuary

Frontiers in Marine Science, 2022
As interest in tourism and conservation grows worldwide, whale-watching has become a popular means of educating the public about wildlife conservation.
Emma L. Ausen, Marianne Marcoux, Marianne Marcoux, Wayne S. Chan, David G. Barber   +4 more
doaj   +1 more source

Predators and scavengers: Polar bears as marine carrion providers

Oikos, EarlyView.
Scavenging is a foraging strategy widely used across the animal kingdom and apex predators provide a large amount of energy in a food web by provisioning carrion. In the harsh environmental conditions of the Arctic, apex predators such as polar bears Ursus maritimus can provide scavenging opportunities for many species. Carrion can act as a buffer when
Holly E. L. Gamblin, Andrew E. Derocher, Evan S. Richardson, David McGeachy, James D. Roth, Nicholas W. Pilfold   +5 more
wiley   +1 more source

Concentrations of Polychlorinated Biphenyls (PCB’s), Chlorinated Pesticides, and Heavy Metals and Other Elements in Tissues of Belugas, Delphinapterus leucas, from Cook Inlet [PDF]

, 2000
Tissues from Cook Inlet beluga whales, Delphinapterus leucas, that were collected as part of the Alaska Marine Mammal Tissue Archival Project were analyzed for polychlorinated biphenyls (PCB’s), chlorinated pesticides, and heavy metals and other elements.
Becker, Paul R., Demiralp, Rabia, Donais, Mary Kate, Epstein, Michael S., Krahn, Margaret M., Mackey, Elizabeth A., Muir , Derek C. G., Porter, Barbara J., Schantz , Michele M., Wise , Stephen A.   +9 more
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Beluga, Delphinapterus leucas, Distribution and Survey Effort in the Gulf of Alaska [PDF]

, 2000
Beluga, Delphinapterus leucas, distribution in the Gulf of Alaska and adjacent inside waters was examined through a review of surveys conducted as far back as 1936.
Laidre, Kristin L., Mahoney, Barbara A., Rugh, David J., Shelden, Kim E. W.   +3 more
core  

Reproductive Failure in UK Harbour Porpoises Phocoena phocoena : Legacy of Pollutant Exposure? [PDF]

, 2015
This research was supported by a Marie Curie International Outgoing Fellowship within the Seventh European Community Framework Programme (Project Cetacean-stressors, PIOF-GA-2010-276145 to PDJ and SM).
Barber, Jonathan L., Brownlow, Andrew, Davison, Nick, Deaville, Robert, Jepson, Paul D., Law, Robin J., Learmonth, Jennifer A., Murphy, Sinead, Penrose, Rod, Perkins, Matthew W., Pierce, Graham J., Read, Fiona L.   +11 more
core   +6 more sources

Modelling the effect of varying metabolic rate and cardiac output on estimated tissue and blood O2 and CO2 levels in an extreme deep‐diver, the goose‐beaked whale (Ziphius cavirostris)

Experimental Physiology, EarlyView.
Abstract High‐resolution movement data from Cuvier's beaked, or goose‐beaked whale (Ziphius cavirostris, hereafter Ziphius, n = 8) tag deployments (4.1–19.2 days) were used to estimate blood and tissue O2 and CO2 levels. Acceleration and magnetometry data were used to estimate the locomotion cost (LC) from the relationship between activity and the O2 ...
Andreas Fahlman, Gregory S. Schorr, David A. Sweeney, Brenda K. Rone, Shannon N. Coates, Austin S. Allen, Lucia M. Martín López, Susan M. Jarvis, Erin A. Falcone   +8 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

A Look at Important Marine Areas in the U.S. Beaufort and Chukchi Seas: Ecologically rich places to protect in the Arctic Ocean [PDF]

, 2016
Sound decision-making about the future of the U.S. Arctic Ocean must include an understanding of how its marine ecosystems function. Although all areas of the U.S. Chukchi and Beaufort seas contribute to ecological integrity, some are especially vital to

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