To simplify the treatment of fitness at two levels, we ignore the distinction between realized and expected fitness. The notion of particle fitness is then straightforward. A particle's fitness is the number of offspring particles it leaves, over some appropriate number of particle
16 Note that 'allelic fitness' as the term is used here means the fitness of an allele within a diploid genotype. This is not the same as the 'marginal allelic fitness' of standard population genetics textbooks, which is the fitness of an allele-type averaged across all genotypes. See Chapter 5, Section 5.3 and Kerr and Godfrey-Smith (2002) for further discussion of this point.
Was this article helpful?