Cortisol levels in blood and hair of unanesthetized grizzly bears (Ursus arctos) following intravenous cosyntropin injection [PDF]
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 +7 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 +3 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 +5 more
doaj +2 more sources
The impact of roads on the demography of grizzly bears in Alberta. [PDF]
PLoS ONE, 2014 One of the principal factors that have reduced grizzly bear populations has been the creation of human access into grizzly bear habitat by roads built for resource extraction.
John Boulanger, Gordon B Stenhouse
doaj +2 more sources
Estimating unrecorded human-caused mortalities of grizzly bears in the Flathead Valley, British Columbia, Canada [PDF]
PeerJ, 2018 Managing the number of grizzly bear (Ursus arctos) mortalities to a sustainable level is fundamental to bear conservation. All known grizzly bear deaths are recorded by management agencies but the number of human-caused grizzly bear deaths that are not ...
Bruce N. McLellan +2 more
doaj +3 more sources
Increased cardiac myosin super-relaxation as an energy saving mechanism in hibernating grizzly bears [PDF]
Molecular MetabolismAim: The aim of the present study was to define whether cardiac myosin contributes to energy conservation in the heart of hibernating mammals. Methods: Thin cardiac strips were isolated from the left ventricles of active and hibernating grizzly bears ...
Robbert J. Van der Pijl +11 more
doaj +2 more sources
Effect of season and high ambient temperature on activity levels and patterns of grizzly bears (Ursus arctos). [PDF]
PLoS ONE, 2015 Understanding factors that influence daily and annual activity patterns of a species provides insights to challenges facing individuals, particularly when climate shifts, and thus is important in conservation.
Michelle L McLellan, Bruce N McLellan
doaj +2 more sources
Identifying presence or absence of grizzly and polar bear cubs from the movements of adult females with machine learning [PDF]
Movement EcologyBackground 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 +11 more
doaj +2 more sources
Seasonal and individual variation in the use of rail-associated food attractants by grizzly bears (Ursus arctos) in a national park. [PDF]
PLoS ONE, 2017 Similar to vehicles on roadways, trains frequently kill wildlife via collisions along railways. Despite the prevalence of this mortality worldwide, little is known about the relative importance of wildlife attractants associated with railways, including ...
Maureen H Murray +4 more
doaj +2 more sources
Comparison of methanol and isopropanol as wash solvents for determination of hair cortisol concentration in grizzly bears and polar bears [PDF]
MethodsX, 2017 Methodological differences among laboratories are recognized as significant sources of variation in quantification of hair cortisol concentration (HCC).
Thomas Kroshko +6 more
doaj +2 more sources