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Trade-off between parasitoid resistance and larval competitive ability in Drosophila melanogaster

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  • A. R. Kraaijeveld

    (Imperial College at Silwood Park)

  • H. C. J. Godfray

    (Imperial College at Silwood Park)

Abstract

The extent to which an organism is selected to invest in defences against pathogens and parasites depends on the advantages that ensue should infection occur, but also on the costs of maintaining defences in the absence of infection. The presence of heritable variation in resistance suggests that costs exist, but we know very little about the nature or magnitude of these costs in natural populations of animals1. A powerful technique for identifying trade-offs between fitness components is the study of correlated responses to artificial selection2,3. We have selected Drosophila melanogaster for improved resistance against an endoparasitoid, Asobara tabida. Endoparasitoids are insects whose larvae develop internally within the body of other insects, eventually killing them, although their hosts can sometimes survive attack by mounting a cellular immune response4,5,6. We found that reduced larval competitive ability in unparasitized D. melanogaster is a correlated response to artificial selection for improved resistance against A. tabida. The strength of selection for competitive ability and parasitoid resistance is likely to vary temporally and spatially, which may explain the observed heritable variation in resistance.

Suggested Citation

  • A. R. Kraaijeveld & H. C. J. Godfray, 1997. "Trade-off between parasitoid resistance and larval competitive ability in Drosophila melanogaster," Nature, Nature, vol. 389(6648), pages 278-280, September.
    • Handle: RePEc:nat:nature:v:389:y:1997:i:6648:d:10.1038_38483
    DOI: 10.1038/38483
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    Cited by:

    1. Kelly, Colleen K. & Bowler, Michael G., 2009. "Investigating the role of enemies in temporal dynamics: Differential sensitivity, competition and stable coexistence," Theoretical Population Biology, Elsevier, vol. 76(4), pages 278-284.
    2. Alexei Romanioukha & Arseniy S. Karkach & James R. Carey & Anatoli I. Yashin, 2010. "Adaptive trade-off in C. capitata is a characteristic feature of the long-lived subpopulation," MPIDR Working Papers WP-2010-019, Max Planck Institute for Demographic Research, Rostock, Germany.
    3. Arancio, Marc & Sourisseau, Marc & Souissi, Sami, 2014. "Processes leading to the coexistence of a host and its parasitoid in homogeneous environments: The role of an infected dormant stage," Ecological Modelling, Elsevier, vol. 279(C), pages 78-88.
    4. Beatriz Acuña Hidalgo & Luís M. Silva & Mathias Franz & Roland R. Regoes & Sophie A. O. Armitage, 2022. "Decomposing virulence to understand bacterial clearance in persistent infections," Nature Communications, Nature, vol. 13(1), pages 1-14, December.

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