Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
, 144 (1), 15-35

Koinophilia Groups Sexual Creatures Into Species, Promotes Stasis, and Stabilizes Social Behaviour


Koinophilia Groups Sexual Creatures Into Species, Promotes Stasis, and Stabilizes Social Behaviour

J H Koeslag. J Theor Biol.


In a population whose members' genomes are subject to degradation by random mutations, the heritable vigour of the most common phenotypes is unquestionable (though not necessarily optimal), and that of fringe individuals is always suspect. Natural selection will therefore support the evolution of an affinity for modal mates (i.e. koinophilia). The population's genetic make-up can then not readily be invaded by non-cryptic mutations. This imposes considerable phenotypic conservatism on sexually reproducing creatures, and inexorably canalizes them into sexually isolated, phenotypically distinct species. The model predicts, and the empiric data confirms, that the phenotypic gaps between largely monomorphic sexual species do not characterize the taxonomy of longstanding apomicts, where variation below the genus level is often continuous. The bias against the propagation of all forms of phenotypic novelty and non-conformity stabilizes social animals against selfish mutants, thus removing the barriers to the evolution of "group adaptations".

Similar articles

See all similar articles

Cited by 2 PubMed Central articles

  • Criteria of Facial Attractiveness in Five Populations
    D Jones et al. Hum Nat 4 (3), 271-96. PMID 24214367.
    The theory of sexual selection suggests several possible explanations for the development of standards of physical attractiveness in humans. Asymmetry and departures from …
  • A Comparative View of Face Perception
    DA Leopold et al. J Comp Psychol 124 (3), 233-51. PMID 20695655.
    Face perception serves as the basis for much of human social exchange. Diverse information can be extracted about an individual from a single glance at their face, includ …

LinkOut - more resources