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Picture of the Day

New study informs debate on predator-prey relationships

Experts have shed new light on the relationship between predators and their prey after studying how elk responded to the risk posed by grey wolves in an American national park. New research used global positioning system (GPS) tracking technology to monitor the behaviour of both species in Yellowstone National Park -- which spans Wyoming, Montana and Idaho -- where wolves were reintroduced in the mid-1990s. Earlier studies have suggested that elk -- the main prey of grey wolves in Yellowstone -- modified their behaviour to avoid specific areas or times when the risk of being hunted was high. However, the latest research has found "little evidence" of elk responding to wolf predation risk.

Visit Website | Image credit: Matt Metz/University of Stirling