The red queen and king in finite populations Journal Article

Author(s): Veller, Carl; Hayward, Laura K; Hilbe, Christian; Nowak, Martin A
Article Title: The red queen and king in finite populations
Affiliation IST Austria
Abstract: In antagonistic symbioses, such as host–parasite interactions, one population’s success is the other’s loss. In mutualistic symbioses, such as division of labor, both parties can gain, but they might have different preferences over the possible mutualistic arrangements. The rates of evolution of the two populations in a symbiosis are important determinants of which population will be more successful: Faster evolution is thought to be favored in antagonistic symbioses (the “Red Queen effect”), but disfavored in certain mutualistic symbioses (the “Red King effect”). However, it remains unclear which biological parameters drive these effects. Here, we analyze the effects of the various determinants of evolutionary rate: generation time, mutation rate, population size, and the intensity of natural selection. Our main results hold for the case where mutation is infrequent. Slower evolution causes a long-term advantage in an important class of mutualistic interactions. Surprisingly, less intense selection is the strongest driver of this Red King effect, whereas relative mutation rates and generation times have little effect. In antagonistic interactions, faster evolution by any means is beneficial. Our results provide insight into the demographic evolution of symbionts.
Keywords: symbiosis; Müllerian mimicry; antagonism; mutualism; rate of evolution
Journal Title: PNAS
Volume: 114
Issue 27
ISSN: 1091-6490
Publisher: National Academy of Sciences  
Date Published: 2017-07-03
Start Page: E5396
End Page: E5405
DOI: 10.1073/pnas.1702020114
Open access: yes (repository)