Results 1 to 10 of about 2,917 (177)
Viruses in unexplained encephalitis cases in American black bears (Ursus americanus). [PDF]
PLoS ONE, 2020 Viral infections were investigated in American black bears (Ursus americanus) from Nevada and northern California with and without idiopathic encephalitis.
Charles E Alex +12 more
doaj +2 more sources
Matrilinear hierarchy in the American black bear (Ursus americanus). [PDF]
Integr Zool, 2022 AbstractThe American black bear (Ursus americanus) was long thought to be solitary and its social organization has not been well described. Here, we present new data on black bear social structure. The objectives of the study were to make detailed observations of the behavior of wild black bears to determine their social interactions and structure.
Kilham B, Spotila JR.
europepmc +4 more sources
Tick abundance and life-stage segregation on the American black bear (Ursus americanus) [PDF]
International Journal for Parasitology: Parasites and Wildlife, 2021 Tick abundance and diagnosed cases of tick-borne diseases have been increasing in the United States. American black bear (Ursus americanus) populations have also been increasing in the eastern United States.
Hannah S. Tiffin +2 more
doaj +2 more sources
Influenza A(H5N1) Virus Infections in 2 Free-Ranging Black Bears (Ursus americanus), Quebec, Canada [PDF]
Emerging Infectious Diseases, 2023 Wholly Eurasian highly pathogenic avian influenza H5N1 clade 2.3.4.4b virus was isolated from 2 free-ranging black bears with meningoencephalitis in Quebec, Canada. We found that isolates from both animals had the D701N mutation in the polymerase basic 2
Benjamin T. Jakobek +6 more
doaj +2 more sources
American black bear (Ursus americanus) as a potential host for Campylobacter jejuni. [PDF]
PLoS ONEThe Gram-negative bacterium Campylobacter jejuni is part of the commensal gut microbiota of numerous animal species and a leading cause of bacterial foodborne illness in humans. Most complete genomes of C.
Craig T Parker +5 more
doaj +3 more sources
Sertoli Cell Tumor (SCT) in a Captive Black Bear (Ursus americanus) [PDF]
Veterinary Sciences, 2019 A black bear of 29-year-old (Ursus americanus) died unexpectedly in captivity without any gross lesions or clinical signs. We identified a firm, lobulated, yellowish tan, and well-circumscribed mass embedded inside the testicular tissue at the time of ...
Ahmed K. Elfadl +14 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
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
, 2021 Ursus americanus (Pallas, 1780) Black Bear Figure 2H Material examined. MEXICO – Chihuahua • 1 Municipality of Namiquipa, Potrero Lajas, 28°46′34″N, 107° 27′34″W; elevation 2,180 m a.s.l.; 16 Jan. 2018; obs. F. Álvarez-Córdova. Identification. This is the only extant species of Ursus Linnaeus, 1758 in Mexico. It is a medium-sized bear with long, coarse,
Álvarez-Córdova, Fernando +1 more
openaire +1 more source
EDIS, 2012 The Florida black bear (Ursus americanus floridanus) is a minor predator of beehives in Florida with the potential to cause major destruction. Large-scale urban and agricultural development inexorably reduces prime bear habitat each year.
Malcolm T. Sanford, James D. Ellis
doaj +5 more sources