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Ecologie nutritionnelle et traits d'histoire de vie chez les parasitoïdes: mécanismes et conséquences

Abstract : In insects reproductive success is strongly determined by the nutritional resources available to females and by the allocation rules of these nutrients in the organism. By carrying out a detailed physiological investigation of the host-feeding in two ectoparasitoid synovigenic, we have identified and quantified resources obtained by the parasitoid and tested the effects of these nutrients on female life-history traits. We followed the incorporation of the ingested nutrients into each individual egg laid over the average life span and confirmed a direct link between host-feeding and fecundity. Our results showed that the two major sugars obtained by the parasitoid during host-feeding, trehalose and sucrose, are entirely responsible for the increased longevity observed in host-fed females. To conclude, host-feeding enables females to sustain reproduction as well as maintenance.
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https://tel.archives-ouvertes.fr/tel-00103316
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Submitted on : Wednesday, October 4, 2006 - 9:44:50 AM
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David Giron. Ecologie nutritionnelle et traits d'histoire de vie chez les parasitoïdes: mécanismes et conséquences. Ecologie, Environnement. Université François Rabelais - Tours, 2002. Français. ⟨tel-00103316⟩

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