Stable eusociality via maternal manipulation when resistance is costless

Mauricio Gonzalez Forero

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

In many eusocial species, queens use pheromones to influence offspring to express worker phenotypes. Although evidence suggests that queen pheromones are honest signals of the queen's reproductive health, here I show that queen's honest signalling can result from ancestral maternal manipulation. I develop a mathematical model to study the coevolution of maternal manipulation, offspring resistance to manipulation and maternal resource allocation. I assume that (i) maternal manipulation causes offspring to be workers against offspring's interests; (ii) offspring can resist at no direct cost, as is thought to be the case with pheromonal manipulation; and (iii) the mother chooses how much resource to allocate to fertility and maternal care. In the coevolution of these traits, I find that maternal care decreases, thereby increasing the benefit that offspring obtain from help, which in the long run eliminates selection for resistance. Consequently, ancestral maternal manipulation yields stable eusociality despite costless resistance. Additionally, ancestral manipulation in the long run becomes honest signalling that induces offspring to help. These results indicate that both eusociality and its commonly associated queen honest signalling can be likely to originate from ancestral manipulation.
Original languageEnglish
Pages (from-to)2208-2223
Number of pages16
JournalJournal of Evolutionary Biology
Volume28
Issue number12
Early online date5 Oct 2015
DOIs
Publication statusPublished - 13 Dec 2015

Keywords

  • Altruism
  • Maternal effects
  • Parent-offspring conflict
  • Pheromone

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