Pii: S0025-5564(00)00002-x
نویسندگان
چکیده
A system of non-linear dierence equations is used to model the eects of density-dependent selection and migration in a population characterized by two alleles at a single gene locus. Results for the existence and stability of polymorphic equilibria are established. Properties for a genetically important class of equilibria associated with complete dominance in ®tness are described. The birth of an unusual chaotic attractor is also illustrated. This attractor is produced when migration causes chaotic dynamics on a boundary of phase space to bifurcate into the interior of phase space, resulting in bistable genetic polymorphic behavior. Ó 2000 Published by Elsevier Science Inc. All rights reserved.
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