title: Self-sacrifice in 'desperado' contests between relatives.
authors.affiliation: Laboratoire Écologie & Évolution CNRS UMR 7625 Université Pierre et Marie Curie 7 quai St Bernard, Bâtiment A 75 252 Paris, France. adamcronin@gmail.com.
authors.forename: Adam L
authors.initials: AL
authors.lastname: Cronin
authors.forename: Thibaud
authors.initials: T
authors.lastname: Monnin