Results 1 to 10 of about 1,771 (256)

Bioturbation by grizzly bears in relict solifluction features of Glacier National Park, Montana, USA

Revista de Geomorfologie, 2022
Grizzly bears are an integral part of the northern Rocky Mountains ecosystem, where their foraging and denning leaves a measurable impact on the landscape.
Carol F Sawyer, Clayton J. Whitesides, Melanie B. Stine   +2 more
doaj   +2 more sources

Whitebark pine, population density, and home-range size of grizzly bears in the greater yellowstone ecosystem. [PDF]

PLoS ONE, 2014
Changes in life history traits of species can be an important indicator of potential factors influencing populations. For grizzly bears (Ursus arctos) in the Greater Yellowstone Ecosystem (GYE), recent decline of whitebark pine (WBP; Pinus albicaulis ...
Daniel D Bjornlie, Frank T Van Manen, Michael R Ebinger, Mark A Haroldson, Daniel J Thompson, Cecily M Costello   +5 more
doaj   +2 more sources

Nature vs. Nurture: Evidence for Social Learning of Conflict Behaviour in Grizzly Bears. [PDF]

PLoS ONE, 2016
The propensity for a grizzly bear to develop conflict behaviours might be a result of social learning between mothers and cubs, genetic inheritance, or both learning and inheritance.
Andrea T Morehouse, Tabitha A Graves, Nate Mikle, Mark S Boyce   +3 more
doaj   +2 more sources

Unsecured attractants, collisions, and high mortality strain coexistence between grizzly bears and people in the Elk Valley, southeast British Columbia

Conservation Science and Practice, 2023
Historical persecution of grizzly bears in North America reduced the species range by 55%. Today, dedicated recovery efforts and shifting societal perceptions have supported the recovery and expansion of grizzly bear populations in many areas.
Clayton T. Lamb, Laura Smit, Garth Mowat, Bruce McLellan, Michael Proctor   +4 more
doaj   +1 more source

Recovery of the grizzly bear at the intersection of law and science

Frontiers in Conservation Science, 2023
Over the last 30 years, there have been numerous legal battles over recovery of the grizzly bear. These battles have brought to fore a question central to implementation of the Act, namely is the goal of recovery to merely remediate extinction risk or to
Noah Greenwald
doaj   +1 more source

北极熊和灰熊的杂交对北极熊灭绝的促进

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
doaj   +1 more source

Working Together for Grizzly Bears: A Collaborative Approach to Estimate Population Abundance in Northwest Alberta, Canada

Frontiers in Conservation Science, 2021
Grizzly bears are a threatened species in Alberta, Canada, and their conservation and management is guided by a provincial recovery plan. While empirical abundance and densities estimates have been completed for much of the province, empirical data are ...
Courtney Hughes, Rolanda J. Steenweg, Lucas M. Vander Vennen, Natalka A. Melnycky, Lyle Fullerton, James T. Witiw, Andrea Morehouse   +6 more
doaj   +1 more source

Predicting grizzly bear density in western North America. [PDF]

PLoS ONE, 2013
Conservation of grizzly bears (Ursus arctos) is often controversial and the disagreement often is focused on the estimates of density used to calculate allowable kill.
Garth Mowat, Douglas C Heard, Carl J Schwarz   +2 more
doaj   +1 more source

Cortisol levels in blood and hair of unanesthetized grizzly bears (Ursus arctos) following intravenous cosyntropin injection

Veterinary Medicine and Science, 2021
Hair cortisol concentration (HCC) is being used increasingly to evaluate long‐term stress in many mammalian species. Most of the cortisol is assumed to passively diffuse from circulating blood into hair follicles and gradually accumulate in growing hair.
Marc Cattet, David M. Janz, Luciene Kapronczai, Joy A. Erlenbach, Heiko T. Jansen, O Lynne Nelson, Charles T. Robbins, Gordon B. Stenhouse   +7 more
doaj   +1 more source

Comparing Space Use and Fecal Glucocorticoid Concentrations during and after the COVID-19 Closure to Investigate Visitor Effects in Multiple Species

Journal of Zoological and Botanical Gardens, 2022
We used the COVID-19 pandemic closure at the Saint Louis Zoo to examine visitor effects on space use and glucocorticoid levels in banteng, grizzly bears, polar bears, and western lowland gorillas.
Ashley N. Edes, Nathan C. Liu, Eli Baskir, Karen L. Bauman, Corinne P. Kozlowski, Helen L. Clawitter, David M. Powell   +6 more
doaj   +1 more source