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ASSOCIATION BETWEEN FEEDING RATE AND PARASITOID RESISTANCE IN DROSOPHILA MELANOGASTER
Author(s) -
Fellowes M. D. E.,
Kraaijeveld A. R.,
Godfray H. C. J.
Publication year - 1999
Publication title -
evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.84
H-Index - 199
eISSN - 1558-5646
pISSN - 0014-3820
DOI - 10.1111/j.1558-5646.1999.tb04544.x
Subject(s) - biology , parasitoid , competition (biology) , drosophila melanogaster , larva , resistance (ecology) , parasitoid wasp , zoology , drosophila (subgenus) , ecology , genetics , gene
Replicate lines of Drosophila melanogaster have been selected for increased resistance against one of two species of parasitoid wasp, Asobara tabida and Leptopilina boulardi . In both cases, it has been shown that an improved ability to mount an immunological defense against the parasitoid's egg is associated with reduced survival when the larvae are reared under conditions of low resource availability and thus high competition. We show here that in both sets of selected lines, lower competitive ability is associated with reduced rates of larval feeding, as measured by the frequency of retractions of the cephalopharyngeal skeleton. This suggests that the same or similar physiological processes are involved in the trade‐off between competition and resistance against either parasitoid and shows how the interaction between adaptations for competition and natural enemy resistance may be mediated.