Results 11 to 20 of about 1,532 (172)
Sex-selective harvesting of polar bears Ursus maritimus
Wildlife Biology, 2008 Abstract We explored limits and consequences of male-biased harvesting of polar bears Ursus maritimus using a simulated population based on empirically-derived estimates of age-specific rates of survival and reproduction. The maximum sustainable yield (MSY) was identified as the total kill in which the number of females that could be taken resulted in ≤
François Messier
exaly +2 more sources
Anti-NMDA Receptor Encephalitis in the Polar Bear (Ursus maritimus) Knut. [PDF]
Sci Rep, 2015 AbstractKnut the polar bear of the Berlin Zoological Garden drowned in 2011 following seizures and was diagnosed as having suffered encephalitis of unknown etiology after exhaustive pathogen screening. Using the diagnostic criteria applied to human patients, we demonstrate that Knut’s encephalitis is almost identical to anti-NMDA receptor encephalitis ...
Prüss H +5 more
europepmc +5 more sources
Polar bears and expanding sea ice in the Mid Holocene Aleutian Islands, Alaska [PDF]
Scientific ReportsThe archaeological record offers the opportunity to infer the effects of regional climatic shifts on species distributions and human-animal interactions.
Lillian Draper Parker +7 more
doaj +2 more sources
Frontiers in Marine Science, 2018 In Greenland, polar bears (Ursus maritimus) are nutritional, economic, and cultural subsistence resources for Inuit. Traditional Ecological Knowledge (TEK) collected from subsistence hunters can provide important insights and improve management decisions
Kristin Laidre, Laidre Kristin L
exaly +3 more sources
Members of the family Ursidae in the Museum of Nature of Kharkiv University and their craniological features [PDF]
Theriologia Ukrainica, 2019 The exhibition and scientific collection of the Museum of Nature currently deposit 16 specimens of the family Ursidae (bears), which belong to three species and 6 subspecies.
Yuriy Iliukhin
doaj +1 more source
Dietary ecology of the extinct cave bear: Evidence of omnivory as inferred from dental microwear textures [PDF]
Acta Palaeontologica Polonica, 2016 The diet of the extinct European cave bear, Ursus spelaeus, has widely been debated. Diverging from the extant brown bear (Ursus arctos) approximately 1.2 million years ago, the cave bear is one of the most ubiquitous fossil bears occurring in Europe ...
D. Brent Jones, Larisa R.G. DeSantis
doaj +1 more source
Polar Research, 2022 Sea-ice distribution and duration are declining across the circumpolar range of the polar bear (Ursus maritimus), resulting in a reduced access to ice-obligate seals, its primary prey.
Martyn E. Obbard +4 more
doaj +1 more source
Anthropogenic food: an emerging threat to polar bears
Oryx, 2023 Supplemental food from anthropogenic sources is a source of conflict with humans for many wildlife species. Food-seeking behaviours by black bears Ursus americanus and brown bears Ursus arctos can lead to property damage, human injury and mortality of ...
Tom S. Smith +7 more
doaj +1 more source
A real-time PCR assay to accurately quantify polar bear DNA in fecal extracts [PDF]
PeerJ, 2020 DNA extracted from fecal samples contains DNA from the focal species, food, bacteria and pathogens. Most DNA quantification methods measure total DNA and cannot differentiate among sources.
Kristen M. Hayward +5 more
doaj +2 more sources
RIPPLE MARKS—The Story Behind the Story [PDF]
Oceanography, 2015 Last of the Ice Bears? Climate Change Threatens Iconic Polar Bears’ Food Sources In 1773, King George III of England appointed naval officer Constantine John Phipps to command an Arctic expedition.
Cheryl Lyn Dybas
doaj +1 more source