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dc.contributor.authorRautiala, Petri Tapio
dc.contributor.authorHelanterä, Heikki
dc.contributor.authorPuurtinen, Mikael
dc.identifier.citationRautiala , P T , Helanterä , H & Puurtinen , M 2019 , ' Extended haplodiploidy hypothesis ' , Evolution Letters , vol. 3 , no. 3 , pp. 263-270 .
dc.descriptionP.R., M.P., and H.H. were supported by Academy of Finland (grant 258385 to M.P., grant 135970 to H.H., and 252411 to the Centre of Excellence in Biological Interactions), P.R. also by the Royal Society Newton International Fellowship, and H.H. also by the Kone Foundation.en
dc.description.abstractEvolution of altruistic behavior was a hurdle for the logic of Darwinian evolution. Soon after Hamilton formalized the concept of inclusive fitness, which explains how altruism can evolve, he suggested that the high sororal relatedness brought by haplodiploidy could be why Hymenopterans have a high prevalence in eusocial species, and why helpers in Hymenoptera are always female. Later it was noted that in order to capitalize on the high sororal relatedness, helpers would need to direct help toward sisters, and this would bias the population sex ratio. Under a 1:3 males:females sex ratio, the inclusive fitness valuation a female places on her sister, brother, and an own offspring are equal—apparently removing the benefit of helping over independent reproduction. Based on this argumentation, haplodiploidy hypothesis has been considered a red herring. However, here we show that when population sex ratio, cost of altruism, and population growth rate are considered together, haplodiploidy does promote female helping even with female‐biased sex ratio, due the lowered cost of altruism in such populations. Our analysis highlights the need to re‐evaluate the role of haplodiploidy in the evolution of helping, and the importance of fully exploring the model assumptions when comparing interactions of population sex ratios and social behaviors.
dc.relation.ispartofEvolution Lettersen
dc.subjectHaplodiploidy hypothesisen
dc.subjectInclusive fitnessen
dc.subjectKin selectionen
dc.subjectReproductive altruismen
dc.subjectQH301 Biologyen
dc.titleExtended haplodiploidy hypothesisen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews. School of Biologyen
dc.description.statusPeer revieweden

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