Sexually antagonistic coevolution for sexual harassment can act as a barrier to further invasions by parthenogenesis

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The assumption of a twofold cost of sex not only complicates the maintenance of sex but also sets conditions for sexual conflict: in organisms with the twofold cost, males often sexually harass females. Sexual harassment is detrimental to female fitness and thus might help maintain sexual populations if male harassment inflicts a harsher cost on parthenogens than on sexual females (asymmetric harassment cost). However, the generality of this concept is now considered doubtful because selective harassment of parthenogens results in loss of mating opportunities for males. Using three mathematical models, I show here that sexual harassment still can impose the asymmetric cost on parthenogens. First, I apply the Lotka- Volterra model to show the degree of asymmetric harassment cost that permits sex to be maintained stably in the population. Second, using adaptive dynamics, I examine whether sexually antagonistic coevolution for sexual harassment, which occurs only in sexual populations, can promote the asymmetric harassment cost. Finally, an individual-based model, which assumes a spatial structure unlike that in the other two, demonstrates that the asymmetric evolution of harassment cost prevents further invasions of parthenogens from different patches into sexual lineages; these mechanisms may account for allopatric distributions of sexual and parthenogenetic lineages as well as the maintenance of sex.

Original languageEnglish
Pages (from-to)223-234
Number of pages12
JournalAmerican Naturalist
Volume181
Issue number2
DOIs
Publication statusPublished - 2013 Feb
Externally publishedYes

Keywords

  • Adaptive dynamics
  • Competitive exclusion
  • Geographic parthenogenesis
  • Maintenance of sex
  • Sexual conflict

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

Fingerprint Dive into the research topics of 'Sexually antagonistic coevolution for sexual harassment can act as a barrier to further invasions by parthenogenesis'. Together they form a unique fingerprint.

  • Cite this