Sexual selection in hermaphrodites, sperm and broadcast spawners, plants and fungi

Madeleine Beekman, Bart Nieuwenhuis, Daniel Ortiz-Barrientos, Jonathan P. Evans

    Research output: Contribution to journalReview articlepeer-review

    39 Citations (Scopus)
    323 Downloads (Pure)


    Darwin was the first to recognize that sexual selection is a strong evolutionary force. Exaggerated traits allow same-sex individuals to compete over access to mates and provide a mechanism by which mates are selected. It is relatively easy to appreciate how inter- and intrasexual selection work in organisms with the sensory capabilities to perceive physical or behavioural traits that signal mate quality or mate compatibility, and to assess the relative quality of competitors. It is therefore not surprising that most studies of sexual selection have focused on animals with separate sexes and obvious adaptations that function in the context of reproductive competition. Yet, many sexual organisms are both male and female at the same time, often lack sexual dimorphism and never come into direct contact at mating. How does sexual selection act in such species, and what can we learn from them? Here, we address these questions by exploring the potential for sexual selection in simultaneous hermaphrodites, sperm- and broadcast spawners, plants and fungi. Our reviewreveals a range of mechanisms of sexual selection, operating primarily after gametes have been released, which are common in many of these groups and also quite possibly in more familiar (internally fertilizing and sexually dimorphic) organisms.

    Original languageEnglish
    Article number20150541
    JournalPhilosophical Transactions of the Royal Society B: Biological Sciences
    Issue number1706
    Publication statusPublished - 19 Oct 2016


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