Results 11 to 20 of about 15,567 (163)
Acute Chagas' cardiopathy in a polar bear (Ursus maritimus) in Guadalajara, Mexico
Revista da Sociedade Brasileira de Medicina Tropical, 1997 We report a 24 year old female polar bear (Ursus maritimus) who contracted Chagas' infection at the Guadalajara Zoo, in Jalisco, México, and died of acute Chagas' carditis 15 days later.
J. Jaime-Andrade G. +6 more
doaj +2 more sources
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
Infanticide and cannibalism of juvenile polar bears (Ursus maritimus) in Svalbard [PDF]
, 1999 Two instances of infanticide and cannibalism in polar bears (Ursus maritimus) were observed in SE Svalbard, at Hopen Island. In the first, an adult male killed three young cubs at a den site and consumed one of them. In the second, an adult male actively
Wiig, O., Derocher, A.E.
core +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
Magnitude of historical and expected changes of mammals' natural habitats in Eastern Eurasia based on the EEBIO (GLOBIO) modelling approach [PDF]
Праці Теріологічної школи, 2010 In 2005–2006 we developed first in Ukraine 65 GISs (ArcMap 9x) based on new experience using remote sensing data (1 km…25 m) of 1993–2005. The set of maps was used for wide analysis of historical and expected expansion of mammals in the post-soviet ...
Vasyl Prydatko +2 more
doaj +1 more source
Wildlife Letters, 2023 This review explores whether recent hybridization events between polar bears (Ursus maritimus) and grizzly bears (Ursus arctos horribilis) will eventually contribute to the extinction of the modern polar bear.
Craig L. Shafer
doaj +1 more source
Environment International, 2013 Legacy organochlorine contaminants were determined in adipose tissues from 294 polar bears (Ursus maritimus) sampled in East Greenland in 23 of the 28 years between 1983 and 2010.
Rune Dietz +6 more
doaj +1 more source