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Host-feeding strategies of parasitoid wasps

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Summary

Three models of the evolution of host-feeding behaviour in parasitoid wasps are developed. The first assumes that the wasp host feeds purely to obtain resources to mature eggs (limited resource model) while the second assumes that host feeding provides energy for maintenance (pro-ovigenic model). The third model assumes that host feeding provides resources for both maintenance and egg maturation (resource pool model). Two variants of the third model are examined: the first assumes that the risk of mortality is constant and state-independent, the second that resource-depleted individuals suffer a higher risk of mortality. The models are analysed using a combination of stochastic dynamic programming and analytical techniques. The models make different predictions about the relationships between the probability of host feeding and egg load and host density. The available experimental evidence best supports the resource pool model.

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Authors and Affiliations

  1. Department of Biology and NERC Centre for Population Biology, Imperial College at Silwood Park, SL5 7PY, Ascot, Berkshire, UK

    M. S. Chan & H. C. J. Godfray

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  1. M. S. Chan
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  2. H. C. J. Godfray
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Chan, M.S., Godfray, H.C.J. Host-feeding strategies of parasitoid wasps. Evol Ecol 7, 593–604 (1993). https://doi.org/10.1007/BF01237823

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