Results 91 to 100 of about 11,111 (208)

Mitochondrial Genomes Reveal an Explosive Radiation of Extinct and Extant Bears near the Miocene-Pliocene Boundary [PDF]

, 2008
Background: Despite being one of the most studied families within the Carnivora, the phylogenetic relationships among the members of the bear family (Ursidae) have long remained unclear.
Bray, Sarah C. E., Briggs, Adrian W., Cooper, Alan, Dear, Paul H., Hofreiter, Michael, Kolokotronis, Sergios-Orestis, Krause, Johannes, Malaspinas, Anna-Sapfo, Matheus, Paul, Nocon, Aline, O\u27Brien, Stephen J., Paabo, Svante, Rabeder, Gernot, Slatkin, Montgomery, Soibelzon, Leopoldo, Spriggs, Helen, Stiller, Mathias, Unger, Tina   +17 more
core   +10 more sources

The American Black Bear (Ursus americanus) as an Apex Predator: Investigating the Ecological Role of the World's Most Abundant Large Carnivore

Mammal Review, Volume 56, Issue 1, March 2026.
Black bears as apex predators. American black bears can (1) produce top‐down effects on ungulates equal to or exceeding those of typical apex predators and (2) modify the spatiotemporal behaviour of other carnivores, including pumas and coyotes. We argue that the term ‘apex predator’ is highly context dependent and not a species‐wide status.
John M. Nettles, Caroline M. Abramowitz, Wesley W. Boone, Stephen N. Harris, Chloe E. Horton, Meghan P. Keating, Dana L. Nelson, Samantha N. Smith, Katelyn N. Steen, Erin K. Buchholtz, David S. Jachowski   +10 more
wiley   +1 more source

Using tri-axial accelerometers to identify wild polar bear behaviors

Endangered Species Research, 2017
Tri-axial accelerometers have been used to remotely identify the behaviors of a wide range of taxa. Assigning behaviors to accelerometer data often involves the use of captive animals or surrogate species, as their accelerometer signatures are generally ...
Pagano, AM, Rode, KD, Cutting, A, Owen, MA, Jensen, S, Ware, JV, Robbins, CT, Durner, GM, Atwood, TC, Obbard, ME, Middel, KR, Thiemann, GW, Williams, TM   +12 more
doaj   +1 more source

Patterns and Determinants of Mortality in Grey Wolves (Canis lupus)

Mammal Review, Volume 56, Issue 1, March 2026.
This systematic review reveals the global patterns and drivers of grey wolf mortality, highlighting the high mortality risk associated with human coexistence for this cursorial carnivore, and reshaping previous knowledge to guide management and conservation strategies.
Ana Morales‐González, Héctor Ruiz‐Villar, Mario Quevedo, Alberto Fernández‐Gil, Maria Paniw, Eloy Revilla   +5 more
wiley   +1 more source

Grizzly Ursus arctos and black bear U. americanus densities in the interior mountains of North America

Wildlife Biology, 2005
We collected hair samples from bears and used microsatellite genotyping to identify individual bears on three study areas near the Canadian Rocky Mountains. We estimated density of grizzly bears Ursus arctos in eight different ecosystems across five study areas, including the reanalysis of two previously published data sets.
Garth Mowat, Douglas C. Heard, Dale R. Seip, Kim G. Poole, Gord Stenhouse, David W. Paetkau   +5 more
openaire   +1 more source

White‐Tailed Deer Baiting Altered Black Bear Site Use but Not Movements or Range Size

Ecology and Evolution, Volume 16, Issue 2, February 2026.
Black bears (Ursus americanus) in the Upper Peninsula of Michigan, USA visited sites more often and for longer durations following the application of bait targeting white‐tailed deer (Odocoileus virginianus). However, black bear home ranges and movement rates were not influenced by the application of bait.
Nathaniel H. Wehr, Nicholas L. Fowler, Todd M. Kautz, Tyler R. Petroelje, Dean E. Beyer Jr, Jerrold L. Belant   +5 more
wiley   +1 more source

Conservation of Threatened Canada-USA Trans-border Grizzly Bears Linked to Comprehensive Conflict Reduction

Human-Wildlife Interactions, 2018
Mortality resulting from human–wildlife conflicts affects wildlife populations globally. Since 2004, we have been researching conservation issues and implementing a comprehensive program to reduce human–bear conflicts (Ursus spp.; HBC) for 3 small ...
Michael F. Proctor, Wayne F. Kasworm, Kimberly M. Annis, A. Grant MacHutchon, Justin E. Teisberg, Thomas G. Radandt, Chris Servheen   +6 more
doaj   +1 more source

Primarni obostrani difuzni B-velikostanični limfom bubrega s metastazama u središnjem živčanom sustavu u smeđe medvjedice (Ursus arctos) držane u zatočeništvu.

Veterinarski arhiv, 2016
We present the first report of primary bilateral renal diffuse large B-cell lymphoma with central nervous system metastases, in a 7 year-old, captive female brown bear. After 7 months of progressive neurological disease, the animal was euthanized. On necropsy, neoplastic nodules with infiltrative growth in the kidneys were found.
Beck, Ana, Reljić, Slaven, Šoštarić-Zuckermann, Ivan-Conrado, Wrzosek, Marcin, Huber, Doroteja   +4 more
openaire   +1 more source

Differences in Dietary Composition and Interspecific Competition Among Large Carnivores on the Qinghai–Xizang Plateau

Ecology and Evolution, Volume 16, Issue 2, February 2026.
This study elucidated the mechanisms underlying regional coexistence among the snow leopard (Panthera uncia), wolf (Canis lupus), and brown bear (Ursus arctos) through the analysis of their trophic niches. The findings provide a scientific foundation for further investigation into the mechanisms that maintain carnivore communities in high‐altitude ...
Dong Wang, Quanbang Li, Xinming Lian
wiley   +1 more source

BEARS IN PAKISTAN: DISTRIBUTION, POPULATION BIOLOGY AND HUMAN CONFLICTS

Journal of Bioresource Management, 2015
We conducted questionnaire based interviews (n = 1873) of respondents coming from 258 localities about bear tracts in northern parts of Pakistan in 2012-2014 to study Himalyan brown (U. arctos isalbellinus) and Himalayan black (U. t.
Fakhar-I-Abbas, Zahid Iqbal Bhatti, Jibran Haider, Afsar Mian   +3 more
doaj   +1 more source