Author: Norrdahl Kai Korpimäki Erkki
Publisher: Springer Publishing Company
ISSN: 0269-7653
Source: Evolutionary Ecology, Vol.19, Iss.4, 2005-07, pp. : 339-361
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Abstract
In small rodent populations with wide-amplitude fluctuations and low-density bottlenecks, the individuals that survive through the bottlenecks may gain major fitness advantages as they will be the founders of the following population expansion. Most hypotheses assume that there exists a physical or behavioural refuge from increased predation risk, and that the survivors are most likely individuals adapted to use such refuges. A recent hypothesis suggests that survival probability is habitat-dependent so that some otherwise sub-optimal habitats provide a spatial refuge from predation risk by the main predator(s). We used spatially replicated long-term (1981–2004) trapping and tracking data of voles (field vole
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