Data from: Escaping peril: perceived predation risk affects migratory propensity

Kaj Hulthén, Ben B. Chapman, P. Anders Nilsson, Jerker Vinterstare, Lars-Anders Hansson, Christian Skov, Jakob Brodersen, Henrik Baktoft & Christer Brönmark
Although migratory plasticity is increasingly documented, the ecological drivers of plasticity are not well understood. Predation risk can influence migratory dynamics, but whether seasonal migrants can adjust their migratory behaviour according to perceived risk is unknown. We used electronic tags to record the migration of individual roach (Rutilus rutilus), a partially migratory fish, in the wild following exposure to manipulation of direct (predator presence/absence) and indirect (high/low roach density) perceived predation risk in experimental mesocosms....
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