Defining fitness in evolutionary models

  • Roff D
  • 114

    Readers

    Mendeley users who have this article in their library.
  • 28

    Citations

    Citations of this article.

Abstract

The analysis of evolutionary models requires an appropriate definition for fitness. In this paper, I review such definitions in relation to the five major dimensions by which models may be described, namely (i) finite versus infinite (or very large) pop- ulation size, (ii) type of environment (constant, fixed length, temporally stochastic, temporally predictable, spatially stochas- tic, spatially predictable and social environment), (iii) density-independent or density-dependent, (iv) inherent population dynamics (equilibrium, cyclical and chaotic), and (v) frequency-dependent or independent. In simple models, the Malthu- sian parameter ‘r’ or the net reproductive rate R0 may be satisfactory, but once density-dependence or complex population dynamics is introduced the invasion exponent should be used. Defining fitness in a social environment or when there is frequency-dependence requires special consideration.

Author-supplied keywords

  • Adaptive dynamics
  • Fitness
  • Game theory
  • Invasibility
  • Invasion exponent
  • Lyapunov exponent
  • Malthusian parameter

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text

Authors

  • Derek A. Roff

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free