Nutrient intake and its possible drivers in free‐ranging European brown bears (Ursus arctos arctos)
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DOI: 10.1002/ece3.10156
Abstract: Abstract The dietary nutrient profile has metabolic significance and possibly contributes to species' foraging behavior. The brown bear (Ursus arctos) was used as a model species for which dietary ingredient and nutrient concentrations as well… read more here.
Keywords: ursus arctos; brown bears; intake possible; nutrient intake ... See more keywords
Genetic differentiation and asymmetric gene flow among Carpathian brown bear (Ursus arctos) populations—Implications for conservation of transboundary populations
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DOI: 10.1002/ece3.4872
Abstract: Abstract The abundance and distribution of large carnivores in Europe have been historically reduced. Their recovery requires multilevel coordination, especially regarding transboundary populations. Here, we apply nuclear and mitochondrial genetic markers to test for admixture… read more here.
Keywords: ursus arctos; transboundary populations; western carpathians; brown bear ... See more keywords
Genetic turnovers and northern survival during the last glacial maximum in European brown bears
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DOI: 10.1002/ece3.5172
Abstract: Abstract The current phylogeographic pattern of European brown bears (Ursus arctos) has commonly been explained by postglacial recolonization out of geographically distinct refugia in southern Europe, a pattern well in accordance with the expansion/contraction model.… read more here.
Keywords: glacial maximum; last glacial; european brown; ecology ... See more keywords
Seasonal and diel movement patterns of brown bears in a population in southeastern Europe
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DOI: 10.1002/ece3.8267
Abstract: Abstract Most animals concentrate their movement into certain hours of the day depending on drivers such as photoperiod, ambient temperature, inter‐ or intraspecific competition, and predation risk. The main activity periods of many mammal species,… read more here.
Keywords: movement; patterns brown; brown bears; population southeastern ... See more keywords
Mitochondrial haplogrouping of the ancient brown bears (Ursus arctos) in Bulgaria, revealed by the APLP method
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DOI: 10.1007/s13364-020-00482-2
Abstract: In order to investigate the detailed zoogeographical history of brown bears (Ursus arctos) in Bulgaria and their relationships with populations in neighboring regions of Europe and Asia, the amplified product length polymorphism (APLP) method for… read more here.
Keywords: ursus arctos; bears ursus; aplp method; arctos bulgaria ... See more keywords
Influences of landscape heterogeneity on home-range sizes of brown bears
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DOI: 10.1016/j.mambio.2017.09.002
Abstract: Animal space use is influenced by many factors and can affect individual survival and fitness. Under optimal foraging theory, individuals use landscapes to optimize high-quality resources while minimizing the amount of energy used to acquire… read more here.
Keywords: home; resource variability; variability hypothesis; landscape heterogeneity ... See more keywords
Landscape heterogeneity and ecological niche isolation shape the distribution of spatial genetic variation in Iranian brown bears, Ursus arctos (Carnivora: Ursidae)
Sign Up to like & getrecommendations! Published in 2018 at "Mammalian Biology"
DOI: 10.1016/j.mambio.2018.08.007
Abstract: Abstract The formerly large continuous range of brown bears in Iran has become confined to fragmented patches due to habitat conversion. Little is known about population genetic diversity, spatial genetic structure, and the consequences of… read more here.
Keywords: ecological niche; landscape; spatial genetic; niche ... See more keywords
Monitoring follicular dynamics using ultrasonography in captive brown bears (Ursus arctos) during the breeding season.
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DOI: 10.1016/j.theriogenology.2019.08.027
Abstract: Artificial insemination (AI) may be a useful tool in the reproductive management of endangered animals, including bears. To establish an AI program for bears, we investigated follicular dynamics using weekly transrectal ultrasonography in six captive… read more here.
Keywords: dynamics using; follicular dynamics; breeding season; follicle ... See more keywords
Evolutionary history and palaeoecology of brown bear in North-East Siberia re-examined using ancient DNA and stable isotopes from skeletal remains
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DOI: 10.1038/s41598-019-40168-7
Abstract: Over 60% of the modern distribution range of brown bears falls within Russia, yet palaeoecological data from the region remain scarce. Complete modern Russian brown bear mitogenomes are abundant in the published literature, yet examples… read more here.
Keywords: dna stable; ancient dna; history palaeoecology; brown bear ... See more keywords
Cardiac adaptation in hibernating, free-ranging Scandinavian Brown Bears (Ursus arctos)
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DOI: 10.1038/s41598-019-57126-y
Abstract: During six months of annual hibernation, the brown bear undergoes unique physiological changes to adapt to decreased metabolic rate. We compared cardiac structural and functional measures of hibernating and active bears using comprehensive echocardiography. We… read more here.
Keywords: ursus arctos; bears ursus; free ranging; hibernation ... See more keywords
Potential natural immunization against atherosclerosis in hibernating bears
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DOI: 10.1038/s41598-021-91679-1
Abstract: Brown bears (Ursus arctos) hibernate for 5–6 months during winter, but despite kidney insufficiency, dyslipidemia and inactivity they do not seem to develop atherosclerosis or cardiovascular disease (CVD). IgM antibodies against phosphorylcholine (anti-PC) and malondialdehyde… read more here.
Keywords: iga anti; atherosclerosis; anti mda; brown bears ... See more keywords