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Host behaviour manipulation as an evolutionary route towards attenuation of parasitoid virulence

Abstract : By definition, insect parasitoids kill their host during their development. Data are presented showing that ladybirds not only can survive parasitism by Dinocampus coccinellae, but also can retain their capacity to reproduce following parasitoid emergence. We hypothesize that host behaviour manipulation constitutes a preadaptation leading to the attenuation of parasitoid virulence. Following larval development, the parasitoid egresses from the host and spins a cocoon between the ladybird's legs. Throughout parasitoid pupation, the manipulated host acts as a bodyguard to protect the parasitoid cocoon from predation. The parasitoid has evolved mechanisms to avoid killing the host prematurely so that its own survival is not compromised. Bodyguard manipulation may thus constitute a selective trait for the evolution of true parasitism in some host-parasitoid associations.
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https://hal.umontpellier.fr/hal-02513223
Contributeur : Amandine Michel-Avella <>
Soumis le : vendredi 20 mars 2020 - 12:45:25
Dernière modification le : samedi 21 mars 2020 - 01:32:50

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F. Maure, J. Doyon, J. Brodeur, F. Thomas. Host behaviour manipulation as an evolutionary route towards attenuation of parasitoid virulence. Journal of Evolutionary Biology, Wiley, 2014, 27 (12), pp.2871-2875. ⟨10.1111/jeb.12530⟩. ⟨hal-02513223⟩

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