The two conditions for stability of an evolutionary equilibrium, the m-stability and the δ-
stability conditions, are discussed. The m-stability condition is a condition for the …

Several recent models have shown that frequency-dependent disruptive selection created
by intraspecific competition can lead to the evolution of assortative mating and, thus, to …

We present models of adaptive change in continuous traits for the following situations:(1)
adaptation of a single trait within a single population in which the fitness of a given individual …

Widely successful in applied population biology, the Evolutionarily Stable Strategy concept
remains controversial because of the severe restrictions present in its original formulation …

A general notion of evolutionary stability is formulated in models in which the possible
behaviours are parameterized by a continuous variable, and selection is assumed to be …

In recent years the attention of experimental evolutionists has been increasingly directed
toward polymorphism as furnishing desirable plasticity to a species. In particular, attention …

Two recent articles in this journal have dis-cussed the relationship between quantitative
genetic models and evolutionarily stable strategy (ESS) models of the evolution of …

In recent years, three related methods have been used to model the phenotypic dynamics of
traits under the influence of natural selection. The first is based on an approximation to …

In a random mating, diploid population with viability determined by the genotype at two or
more linked loci, natural selection does not guarantee an increase in the average viability of …

servative characters. There is little doubt that if a character is constant throughout a group
that is natural in an evolutionary sense, then that character is a more reliable indicator of …