You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Nomadic Predators and Geographical Synchrony in Microtine Population Cycles
Ronald C. Ydenberg
Vol. 50, No. 2 (Oct., 1987), pp. 270-272
Stable URL: http://www.jstor.org/stable/3566014
Page Count: 3
You can always find the topics here!Topics: Predators, Predation, Rodents, Weather, Population distributions, Foraging, Owls, Birds of prey, Breeding, Lynx
Were these topics helpful?See something inaccurate? Let us know!
Select the topics that are inaccurate.
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
Populations of many microtine rodent species show regular fluctuations that are synchronous over large areas. Previous explanations for synchrony have invoked the influence of weather. I propose an hypothesis which states that, if nomadic predators distribute themselves among the available peak populations, and if they can affect the duration of any phase of the population cycle, then out-of-phase populations will be pushed into phase by the disproportionately high numbers of nomadic predators they attract when they are in peak phase and other populations are low. The mechanism by which predators affect the duration of a cycle phase may lie in the behavioural response of individual microtines to predation risk.
Oikos © 1987 Nordic Society Oikos