séminaire du pôle évolution du vivant

"Sexual selection in viscous populations" - Tommaso Pizzari, University of Oxford - jeudi 2 octobre 2014 à 11h, amphi 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.  

Pr Tommaso Pizzari
Professor of Evolutionary Biology
Edward Grey Institute, Dept of Zoology,
University of Oxford, Oxford OX1 3PS