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Snowmobile Activity and Glucocorticoid Stress Responses in Wolves and Elk
- S. Creel, J. Fox, A. Hardy, Jennifer L. Sands, Bob Garrott, R. Peterson
- Environmental Science
- 1 June 2002
Immunoassays of fecal glucocorticoid levels provide a sensitive and noninvasive method of measuring the physiological stress responses of wildlife to disturbances and there was no evidence that current levels of snowmobile activity are affecting the population dynamics of either species in these locations.
INTROGRESSION OF COYOTE MITOCHONDRIAL DNA INTO SYMPATRIC NORTH AMERICAN GRAY WOLF POPULATIONS
- N. Lehman, Andrew Eisenhawer, R. Wayne
- Biology, Environmental ScienceEvolution; international journal of organic…
- 1 February 1991
The results demonstrate that closely related species of mobile terrestrial vertebrates have the potential for extensive genetic exchange when ecological conditions change suddenly.
Ecosystem consequences of wolf behavioural response to climate
The ecological consequences of predator behavioural response to global climatic variation is reported using 40 years of data on wolf predation from Isle Royale, USA, where wolves limit abundance of moose, which limit productivity of fir trees.
Wolves, Moose, and Tree Rings on Isle Royale
Isle Royale's dendrochronology complements a rich literature on food chain control in aquatic systems, which often supports a trophic cascade model, and provides evidence of top-down control in a forested ecosystem.
Yellowstone after Wolves
It is argued that comprehensive ecological research and monitoring should be an essential long-term component of the management of Yellowstone National Park, and it is predicted that wolf restoration will have similar effects to a degree, reducing elk and coyote density.
Leadership behavior in relation to dominance and reproductive status in gray wolves, Canis lupus
During travel, breeding males and females led packs approximately equally, which probably reflects high parental investment by both breeding male and female wolves.
THE EFFECT OF PREY AND PREDATOR DENSITIES ON WOLF PREDATION
The ratio-dependent-prey-dependent controversy may dissipate with greater appreciation and acknowledgment that both models may be overly simplistic, both have value, and neither deserves primacy.
Coyote coexistence with wolves on the Kenai Peninsula, Alaska
- Joanne M. Thurber, R. Peterson, James D. Woolington, J. Vucetich
- Environmental Science
- 1 December 1992
Lack of or minimal exploitation competition appears to allow coexistence of wolves and coyotes, while interference competition is believed to account for the difference in canid abundance near the two road types.
Seasonal patterns of predation for gray wolves in the multi-prey system of Yellowstone National Park.
- M. Metz, Douglas W. Smith, J. Vucetich, D. Stahler, R. Peterson
- Environmental ScienceThe Journal of animal ecology
- 1 May 2012
This work shows how a large carnivore living in a seasonal environment displays marked seasonal variation in predation because of changes in prey vulnerability, and contradicts previous research that suggests that rates of biomass acquisition for large terrestrial carnivores tend not to vary among seasons.