Anthropogenic Neighborhood Impact on Bacterial and Fungal Communities in Polar Bear Feces [PDF]
Animals, 2023 Climate changes cause a dramatical increase in the ice-free season in the Arctic, forcing polar bears ashore, closer to human settlements associated with new and non-natural food objects.
Maksim V. Vecherskii +14 more
doaj +2 more sources
Novel Divergent Polar Bear-Associated Mastadenovirus Recovered from a Deceased Juvenile Polar Bear [PDF]
mSphere, 2018 Polar bears in captivity can be exposed to opportunistic pathogens not present in their natural environments. A 4-month-old polar bear (Ursus maritimus) living in an isolated enclosure with his mother in the Tierpark Berlin, Berlin, Germany, was ...
Anisha Dayaram +8 more
doaj +2 more sources
Intelligent Nanomaterials for Solar Energy Harvesting: From Polar Bear Hairs to Unsmooth Nanofiber Fabrication [PDF]
Frontiers in Bioengineering and Biotechnology, 2022 Polar bears can live in an extremely cold environment due to their hairs which possess some remarkable properties. The hollow structure of the hair enables the bear to absorb energy from water, and the white and transparent hairs possess amazing optical ...
Qingli Wang +3 more
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Estimating Polar Bear (Ursus maritimus) Age Based on an Epigenetic DNA Methylation Clock [PDF]
Ecology and EvolutionKnowledge of animal age is essential to wildlife managers for obtaining meaningful and accurate insights into demographic parameters. A common approach to aging wildlife, including bears (Ursus spp.), has been extracting a tooth during physical capture ...
Susannah P. Woodruff +4 more
doaj +2 more sources
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
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Efficacy of aerial forward-looking infrared surveys for detecting polar bear maternal dens. [PDF]
PLoS ONE, 2020 Denned polar bears (Ursus maritimus) are invisible under the snow, therefore winter-time petroleum exploration and development activities in northern Alaska have potential to disturb maternal polar bears and their cubs.
Tom S Smith +3 more
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Screening for the ancient polar bear mitochondrial genome reveals low integration of mitochondrial pseudogenes (numts) in bears [PDF]
Mitochondrial DNA. Part B. Resources, 2017 Phylogenetic analyses of nuclear and mitochondrial genomes indicate that polar bears captured the brown bear mitochondrial genome 160,000 years ago, leading to an extinction of the original polar bear mitochondrial genome.
Fritjof Lammers +4 more
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Late Pleistocene polar bear genomes reveal the timing of allele fixation in key genes associated with Arctic adaptation [PDF]
BMC GenomicsThe polar bear (Ursus maritimus) occupies a relatively narrow ecological niche, with many traits adapted for cold temperatures, movement across snow, ice and open water, and for consuming highly lipid-dense prey species.
Yulin Sun +2 more
doaj +2 more sources
Kas amka, kostako või hoopis keegi muu? [PDF]
Mäetagused, 2003 The main character of the Chukotka travelling diary, Jelo, this time gets to hunt a polar bear after it is seen moving about near the camp of the reindeer-herders. The hunt is unsuccessful and the wounded animal runs away.
Ülo Siimets
doaj +2 more sources
Are polar bear habitat resource selection functions developed from 1985–1995 data still useful? [PDF]
Ecology and Evolution, 2019 Greenhouse‐gas‐induced warming in the Arctic has caused declines in sea ice extent and changed its composition, raising concerns by all circumpolar nations for polar bear conservation.
George M. Durner +2 more
doaj +2 more sources