You are not currently logged in.
Access your personal account or get JSTOR access 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.
A Spatially Explicit Stochastic Model Demonstrates the Feasibility of Wright's Shifting Balance Theory
Steven L. Peck, Stephen P. Ellner and Fred Gould
Vol. 52, No. 6 (Dec., 1998), pp. 1834-1839
Published by: Society for the Study of Evolution
Stable URL: http://www.jstor.org/stable/2411353
Page Count: 6
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
Recently there has been a resurgence of theoretical papers exploring Wright's Shifting Balance Theory (SBT) of evolution. The SBT explains how traits which must pass through an adaptive valley may evolve in substructured populations. It has been suggested that Phase III of the SBT (the spread of new advantageous traits through the populations) proceeds only under a very restricted set of conditions. We show that Phase III can proceed under a much broader set of conditions in models that properly incorporate a key feature of Wright's theory local, random migration of discrete individuals.
Evolution © 1998 Society for the Study of Evolution