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Using drilled-undrilled shell damage analysis to estimate crushing predation frequencies in modern marine gastropod assemblages
DownloadSpring 2010
Predation is a frequently studied subject, but estimating crushing predation in mollusk communities is challenging. Shells record successful attacks, but it is not always possible to identify attacks on an individual basis. Repair scar frequency is a common proxy for crushing mortality, but shell...
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1980
Population studies of wolves (Canis lupus) were carried out between October 1975 and June 1978 on two study areas in northern Alberta. Ten adult wolves in four packs and two lone wolves were captured, radio collared and repeatedly located in the Alberta Oil Sands Environmental Research Program...
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Wolf Reproduction in Response to Caribou Migration and Industrial Development on the Central Barrens of Mainland Canada
Download2008
Cluff, H.D., Frame, P.F., Hik, D.S.
Reproductive success of mammals is greatly influenced by food availability. Where wolves (Canis lupus) prey on migratory barren-ground caribou (Rangifer tarandus), caribou migration patterns strongly influence food availability for wolves. However, industrial development in formerly undeveloped...
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2018
University of Alberta, Department of Biological Sciences
This is an image of a wolf skull. This specimen is observed in Survey of Vertebrates, Zoology 224. This image was created as part of the University of Alberta OER image database project in Biological Sciences. Identifier 2094I.
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2018
University of Alberta, Department of Biological Sciences
This is an image of a wolf skull. This specimen is observed in Survey of Vertebrates, Zoology 224. This image was created as part of the University of Alberta OER image database project in Biological Sciences. Identifier 2094I.
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Fall 2017
The degree to which predator and prey distributions overlap in space influences the probability of encounters between predator and prey, kills of prey, and consequently, how each species’ abundance varies in time and in space. Predator and prey attempt to increase or decrease overlap respectively...
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Wolves Influence Elk Movements: Behavior Shapes a Trophic Cascade in Yellowstone National Park
Download2005
Fortin, D., Beyer, H. L., Smith, D. W., Boyce, M. S., Mao, J. S., Duchesne, T.
A trophic cascade recently has been reported among wolves, elk, and aspen on the northern winter range of Yellowstone National Park, Wyoming, USA, but the mechanisms of indirect interactions within this food chain have yet to be established. We investigated whether the observed trophic cascade...