Theoretical genetics of batesian mimicry I. Single-locus models

We describe a computer model of a population with overlapping generations, and with density-dependent larval mortality, which can be used as the basis for deterministic simulation of the genetics of Batesian mimicry.

Using single-locus models of the genetic basis of the mimicry, we have investigated the various types of equilibrium that are possible, if the mimetic forms differ from one another, and from the non-mimics, in both degree of mimetic resemblance and in conspicuousness. This has not previously been done. Four basic types of polymorphic equilibrium are possible. The unexpected nature of certain of these equilibria is discussed.

It is possible to study the effect of the evolution of mimicry on the model species' population size, by extending the original system to one in which both the model and mimetic species are simulated, and their populations both regulated in size by density-dependent mortality. Results from these simulations are presented.