Like many “high islands” of the South Pacific, the lagoon of Raiatea contains several small satellite islands ( motus) associated with the surrounding coral reef. Raiatea is the largest of the Leeward Islands in French Polynesia and serves as the regional administrative and public health center for the western Society Archipelago. The small islands of the archipelago lend themselves to studies of vector biology on replicated sites. The coupling of MDA with effective vector control may be required to upset disease transmission ( Burkot et al. Aedes polynesiensis females are more efficient at transmission (which requires development of the parasite but is nonpropagative in the vector) as the number of ingested microfilariae decreases (as occurs during MDA) ( Rosen 1955, Pichon et al. polynesiensis contributes to the failure of MDA in these archipelagoes despite success elsewhere ( Burkot et al.
It has been hypothesized that the biology of Ae. bancrofti, lymphatic filariasis persists in French Polynesia ( Esterre et al. 2005).ĭespite prolonged mass administration of prophylactic drugs (MDA) against W. polynesiensis respond to overcrowding and resource limitation during larval development through reduced survival, skewed sex ratios, and smaller size at emergence and delayed emergence, especially for females ( Mercer 1999, Mercer et al. Like many container-breeding mosquitoes, cohorts of Ae. Aedes polynesiensis uses a variety of natural and artificial containers for development, complicating vector control ( Lardeux et al. Host seeking mostly is diurnal and outdoors, with peaks of activity at dawn and dusk ( Russell 2004). 1965), and a secondary vector of dengue in French Polynesia ( Rosen et al. Differences in vector abundance observed when comparing neighboring motus are likely because of differences in human activity and mosquito suppression.Īedes polynesiensis Marks (Diptera: Culicidae) is the primary vector of Wuchereria bancrofti (Cobbold) (Spirurida: Onchocercidae), the causative agent of human lymphatic filariasis ( Rosen 1955, Laigret et al. Local weather patterns predicted about half the variation in mosquito numbers. Nonetheless, at least on the two highly productive motus, dry-season females had larger wing lengths than their wet season counterparts. Significantly more females were captured during the wet season than the dry season.
Thus, wing lengths were influenced more by local developmental conditions than overall numbers of adults. Shoreline and Horea females had significantly longer mean wing lengths than females from Tiano and Toamaro.
polynesiensis females per collection differed among trapping dates and locations, with the majority of females captured on two motus, Horea and Toamaro. Aedes polynesiensis males, Aedes aegypti (L.), and Culex quinquefasciatus Say rarely were collected. Aedes polynesiensis Marks females comprised the overwhelming majority (≈99%) of the three species of mosquitoes captured in Biogent Sentinel traps placed at fixed sites on three small satellite islands ( motus) of the western lagoon and on the shoreline of Raiatea.
Et nous finirons en parlant de la canicule marine, qui menace la faune et la flore de Méditerranée.Adult numbers and sizes of mosquitoes were monitored for 2 yr in neighboring habitats on the western coast of Raiatea (Society Archipelago) in anticipation of testing new vector control technologies. Et enfin, nous discuterons de la décision des organisateurs du concours de l’Eurovision de choisir le Royaume-Uni pour accueillir l'Eurovision 2023 à la place de l'Ukraine, où la guerre continue.ĭans la deuxième partie de notre émission, « Trending in France », nous discuterons du succès d'une plateforme de location de piscines entre particuliers. Puis, dans la partie science et technologie de notre émission, nous aborderons l'impact financier des espèces envahissantes dans le monde, selon une étude publiée le 28 juillet dans la revue Scientific Reports. Nous commenterons également la visite de la présidente de la Chambre des représentants des États-Unis, Nancy Pelosi, à Taïwan, malgré les objections de la Chine. Tout d'abord, nous parlerons de la frappe américaine en Afghanistan, qui a tué le 30 juillet, Ayman al-Zawahiri, le chef d'Al-Qaïda. Dans la première partie de notre émission, comme toujours, nous commenterons quelques nouvelles qui ont fait les gros titres cette semaine.
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