Sexual selection in viscous populations

Tommaso Pizzari, Edward Grey Institute, Department of Zoology, University of Oxford, Oxford

jeudi 2 octobre 2014 à 11 heures, amphithéâtre Monge

Competition over reproductive opportunities among members of one sex (sexual selection) often harms members of the opposite sex, creating a conflict of interest between individual males and females. This battle of the sexes has become a paradigm in the study of sexual selection and intersexual coevolution. In this seminar, I review recent theoretical advances suggesting that—as in any scenario of intraspecific competition—selfishness (competitiveness) can be strongly influenced by the genetic relatedness of competitors. When competitors are positively related (e.g., siblings), an individual may refrain from harming its competitor(s) and their mate(s) because this can improve the focal individual’s inclusive fitness. I then present recent experimental tests of these ideas in fruit flies (Drosophila melanogaster) and red junglefowl (Gallus gallus). I conclude by arguing that together these findings suggest that population structure is a potentially fundamental yet often overlooked factor in the study of the battle of the sexes.

titre:

Sexual selection in viscous populations

intervenant:

Tommaso Pizzari

date:

jeudi 2 octobre 2014

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Sexual selection in viscous populations

Tommaso Pizzari, Edward Grey Institute, Department of Zoology, University of Oxford, Oxford

jeudi 2 octobre 2014 à 11 heures, amphithéâtre Monge

 

Competition over reproductive opportunities among members of one sex (sexual selection) often harms members of the opposite sex, creating a conflict of interest between individual males and females. This battle of the sexes has become a paradigm in the study of sexual selection and intersexual coevolution. In this seminar, I review recent theoretical advances suggesting that—as in any scenario of intraspecific competition—selfishness (competitiveness) can be strongly influenced by the genetic relatedness of competitors. When competitors are positively related (e.g., siblings), an individual may refrain from harming its competitor(s) and their mate(s) because this can improve the focal individual’s inclusive fitness. I then present recent experimental tests of these ideas in fruit flies (Drosophila melanogaster) and red junglefowl (Gallus gallus). I conclude by arguing that together these findings suggest that population structure is a potentially fundamental yet often overlooked factor in the study of the battle of the sexes.