Beyond Nature and Nurture: Phenotypic Plasticity in Blood-Feeding Behavior of Anopheles gambiae s.s. When Humans Are Not Readily Accessible - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue American Journal of Tropical Medicine and Hygiene Année : 2009

Beyond Nature and Nurture: Phenotypic Plasticity in Blood-Feeding Behavior of Anopheles gambiae s.s. When Humans Are Not Readily Accessible

Résumé

To test for the effects of host accessibility on blood-feeding behavior, we assessed degrees of anthropophily of the malaria mosquito Anopheles gambiae at two stages of the behavioral sequence of host foraging, in a rice growing area near Bobo-Dioulasso, Burkina Faso, where humans are not readily accessible because of years of generalized use of (mostly non-impregnated) bed nets. First, patterns of host selection were assessed by the identification of the blood meal origin of indoor-resting samples. Inherent host preferences were then determined by two odor-baited entry traps, set side by side in a choice arrangement, releasing either human or calf odor. The proportion of feeds taken on humans was around 40%, whereas 88% of trapped An. gambiae "chose" the human-baited trap, indicating a zoophilic pattern of host selection despite a stronger trap entry response with human odor. This paradox can be interpreted as the evolution of a plastic strategy of feeding behavior in this field population of An. gambiae because of the greater accessibility of readily available, although less-preferred, hosts.
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hal-02519204 , version 1 (25-03-2020)

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Thierry Lefèvre, François Renaud, Eric Elguero, Didier Fontenille, Louis-Clément Gouagna, et al.. Beyond Nature and Nurture: Phenotypic Plasticity in Blood-Feeding Behavior of Anopheles gambiae s.s. When Humans Are Not Readily Accessible. American Journal of Tropical Medicine and Hygiene, 2009, 81 (6), pp.1023-1029. ⟨10.4269/ajtmh.2009.09-0124⟩. ⟨hal-02519204⟩
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