Results 11 to 20 of about 1,223 (249)

Identifying presence or absence of grizzly and polar bear cubs from the movements of adult females with machine learning [PDF]

Movement Ecology
Background Information on reproductive success is crucial to understanding population dynamics but can be difficult to obtain, particularly for species that birth while denning. For grizzly (Ursus arctos) and polar bears (U.
Erik M. Andersen, Justin G. Clapp, Milan A. Vinks, Todd C. Atwood, Daniel D. Bjornlie, Cecily M. Costello, David D. Gustine, Mark A. Haroldson, Lori L. Roberts, Karyn D. Rode, Frank T. van Manen, Ryan R. Wilson   +11 more
doaj   +2 more sources

Problem Perspectives and Grizzly Bears: A Case Study of Alberta’s Grizzly Bear Recovery Policy [PDF]

Frontiers in Ecology and Evolution, 2020
Since their threatened species listing in 2010, grizzly bear recovery has been a controversial policy issue in Alberta, Canada particularly because this charismatic carnivore represents a diverse set of values, both positive (e.g., an icon of beauty and the wilderness) and negative (e.g., a safety threat and economic risk to peoples’ livelihoods ...
Andrea Morehouse, Courtney Hughes, Se Nielsen   +2 more
exaly   +3 more sources

Predicting future grizzly bear habitat use in the Bitterroot Ecosystem under recolonization and reintroduction scenarios. [PDF]

PLoS ONE
Many conservation actions must be implemented with limited data. This is especially true when planning recovery efforts for extirpated populations, such as grizzly bears (Ursus arctos) within the Bitterroot Ecosystem (BE), where strategies for ...
Sarah N Sells, Cecily M Costello
doaj   +2 more sources

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   +1 more source

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

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