Foraging range in mice and voles: the role of risk

摘要: The significance of risk assessment in determining the boundaries foraging ranges deer mice and voles was examined by comparing distances to which resident animals were willing follow shifting feeding stations providing equal rewards beyond their previous an area with abundant cover (forest), one where lacking (frozen lake surface). Previous estimated on basis livetrapping "rediscovery distances" for moving stations. In three experiments distance at stopped visiting ("giving-up distance") averaged 3.3 times farther (forest) than it absent (lake). a fourth experiment, reduction supplementary food available within original extended giving-up present but had relatively little effect almost no rediscovery absent. Supplying more tripled givin...