Aggregated use along salmon-bearing (Oncorhynchus spp.) streams is common for coastal brown bears Ursus arctos; however, it much less in non-coastal (interior) environments, especially the Arctic. A concurrent study of GPS-collared interior Brooks Range mountains, northern Alaska, revealed that and their by were more prevalent than previously known. Our goal was to estimate number, gender, spec...

Visitor effect studies have been of keen interest for decades, but there only anecdotal opportunities to investigate the impact prolonged absence visitors on animal welfare in zoos. In some zoos, bears are actively involved animal–visitors interaction through begging, which gives them degree control over gaining food rewards throughout day when present. Prolonged visitor may, therefore, represe...

Human activities have had the strongest impacts on natural ecosystems since the last glacial period, including the alteration of interspecific relationships such as food webs. In this paper, we present a historical record of major alterations of trophic structure by revealing millennium-scale dietary shifts of brown bears (Ursus arctos) on the Hokkaido islands, Japan, using carbon, nitrogen, an...

Large carnivores were persecuted to near extinction during the last centuries, but have now recovered in some countries. It has been proposed earlier that the recovery of the Northern European brown bear is supported by migration from Russia. We tested this hypothesis by obtaining for the first time continuous sampling of the whole Finnish bear population, which is located centrally between the...

Morphometric and morphotypic variability of the cave bear lower incisors from two different geographic regions (Caucasus Urals), stratigraphic periods (Middle Late Pleistocene), bearing mitochondrial haplogroups (kudarensis (Baryshnikov, 1985) ingressus Rabeder, Hofreiter & Withalm, 2004) was studied. Urals Ursus kanivetz Vereshchagin, 1973 is clearly distinguished Caucasian U. kudarensis b...

Bears consuming wild fruits for fall energy accumulation are constrained by several factors, including intake rate, the physiological capacity of the gastrointestinal tract, and the metabolic efficiency of gain in body mass. We measured these relationships through foraging and feeding trials using captive and wild black bears (Ursus americanus) and grizzly bears (Ursus arctos). Four fruit types...

this study was conducted to investigate theallometric growth pattern and sexual dimorphism in the skull of both sexes ofiranian brown bear (ursus arctos) in thealborz mountains using geometric morphometric and traditional morphometric techniques. morphometric parameters were obtained from 2d pictures of skulls using the software imagej and allometric growth pattern was calculated as a power fun...

Wildlife crossing structures are one solution to mitigating the fragmentation of wildlife populations caused by roads, but their effectiveness in providing connectivity has only been superficially evaluated. Hundreds of grizzly (Ursus arctos) and black bear (Ursus americanus) passages through under and overpasses have been recorded in Banff National Park, Alberta, Canada. However, the ability o...