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Article Dans Une Revue Journal of Insect Behavior / Journal of Insect Behaviour Année : 2008

Sex Allocation Decision Under Superparasitism by the Parasitoid Wasp Eupelmus vuilleti

Résumé

Superparasitism is a widespread phenomenon in parasitoids and may be advantageous in some circumstances. In this study, offspring sex ratio was analysed in three superparasitism situations: when the second egg was laid by a random Eupelmus vuilleti (Hymenoptera: Eupelmidae) female from a group, when an isolated female was allowed to lay two eggs on the same host (self-superparasitism) or laid one egg on a host already parasitized by a conspecific (conspecific superparasitism). Females produced a different offspring sex ratio according to the different superparasitism situations tested. These sex ratios are in line with the local mate competition theory. The results further suggest that females can discriminate between hosts parasitized by a conspecific or by themselves and adapt the sex of the eggs they lay accordingly.
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Dates et versions

hal-00314396 , version 1 (27-08-2008)

Identifiants

Citer

Éric Darrouzet, Guy Boivin, Claude Chevrier. Sex Allocation Decision Under Superparasitism by the Parasitoid Wasp Eupelmus vuilleti. Journal of Insect Behavior / Journal of Insect Behaviour, 2008, 21, pp.181-191. ⟨10.1007/s10905-008-9118-3⟩. ⟨hal-00314396⟩
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