Monitoring Temporal Abundance and Spatial Distribution ofAedes polynesiensisUsing BG-Sentinel Traps in Neighboring Habitats on Raiatea, Society Archipelago, French Polynesia

Mercer, David R.; Bossin, Hervé; Sang, Michel Cheong; O'Connor, Linda; Dobson, Stephen L.

doi:10.1603/me11087

Cited by 18 publications

(29 citation statements)

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“…polynesiensis specimens collected) conducted on motu Toamaro (Mercer et al 2012b). A similarly low male proportion (0.9%) was encountered in BGS traps during a 2-yr study involving Toamaro and three other relatively isolated neighboring populations (Mercer et al 2012a). These data highlight important differences of male population densities between typical sites of the Society Islands.…”

Section: Discussionmentioning

confidence: 65%

Population Studies of the Filarial VectorAedes polynesiensis(Diptera: Culicidae) in Two Island Settings of French Polynesia

et al. 2013

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A mark-release-recapture study was conducted to estimate the adult population size, migration, and dispersal patterns of male and female Aedes (Stegomyia) polynesiensis (Marks) in a valley of Moorea, a volcanic island, and a motu (islet) on the atoll of Tetiaroa, two settings typical of the Society Islands. Aedes polynesiensis recapture rate was high for females and low for males. The distribution of Aedes species in the valley was heterogeneous. Marked individuals dispersed to most parts of the motu and over great distances in the valley for some females. The study provides insights into the field dynamics of Ae. polynesiensis populations and confirms that more efficient sampling methods are warranted. There was no evidence of active migration between motus on the atoll, suggesting that Tetiaroa is a suitable site for small-scale initial open releases of Wolbachia incompatible insect technique and other sterile insect technique-like suppression or replacement strategies.

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Section: Discussionmentioning

confidence: 65%

Population Studies of the Filarial VectorAedes polynesiensis(Diptera: Culicidae) in Two Island Settings of French Polynesia

et al. 2013

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“…Existing collecting methods yield low numbers of A. polynesiensis males on Toamaro [37], [38]. Therefore, a mark release recapture experiment was performed at the start of CP male releases.…”

Section: Resultsmentioning

confidence: 99%

Open Release of Male Mosquitoes Infected with a Wolbachia Biopesticide: Field Performance and Infection Containment

et al. 2012

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BackgroundLymphatic filariasis (LF) is a globally significant disease, with 1.3 billion persons in 83 countries at risk. A coordinated effort of administering annual macrofilaricidal prophylactics to the entire at-risk population has succeeded in impacting and eliminating LF transmission in multiple regions. However, some areas in the South Pacific are predicted to persist as transmission sites, due in part to the biology of the mosquito vector, which has led to a call for additional tools to augment drug treatments. Autocidal strategies against mosquitoes are resurging in the effort against invasive mosquitoes and vector borne disease, with examples that include field trials of genetically modified mosquitoes and Wolbachia population replacement. However, critical questions must be addressed in anticipation of full field trials, including assessments of field competitiveness of transfected males and the risk of unintended population replacement.Methodology/Principal FindingsWe report the outcome of field experiments testing a strategy that employs Wolbachia as a biopesticide. The strategy is based upon Wolbachia-induced conditional sterility, known as cytoplasmic incompatibility, and the repeated release of incompatible males to suppress a population. A criticism of the Wolbachia biopesticide approach is that unintended female release or horizontal Wolbachia transmission can result in population replacement instead of suppression. We present the outcome of laboratory and field experiments assessing the competitiveness of transfected males and their ability to transmit Wolbachia via horizontal transmission.Conclusions/SignificanceThe results demonstrate that Wolbachia-transfected Aedes polynesiensis males are competitive under field conditions during a thirty-week open release period, as indicated by mark, release, recapture and brood-hatch failure among females at the release site. Experiments demonstrate the males to be ‘dead end hosts’ for Wolbachia and that methods were adequate to prevent population replacement at the field site. The findings encourage the continued development and extension of a Wolbachia autocidal approach to additional medically important mosquito species.

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“…The mating competitiveness of males from a strain in which a different Wolbachia type has been introgressed has been studied in both laboratory and Þeld cages (Brelsfoard et al 2008, Chambers et al 2011, but Þeld studies on male Ae. polynesiensis ecology and Þtness have been stymied by the low catch numbers of males using traditional femalebased traps (Schmaedick et al 2008, Mercer et al 2012. Successful adaptation of a sound-trap design could facilitate such studies in the future.…”

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confidence: 99%

Determinants of Male Aedes aegypti and Aedes polynesiensis (Diptera: Culicidae) Response to Sound: Efficacy and Considerations for Use of Sound Traps in the Field

2013

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Understanding the mating competitiveness of male mosquitoes in Þeld settings is essential to programs relying on the mass release of modiÞed male mosquitoes, yet studies on male ecology have been hampered by the lack of a convenient trapping method. An existing promising method makes use of the innate attraction of males to female ßight tones. Here, we present laboratory, greenhouse, and Þeld experiments on the efÞcacy of sound traps for the collection of Aedes aegypti (L.) and Aedes polynesiensis Marks, and laboratory experiments with Ae. aegypti on the effects of male age, size, and mating status on responsiveness to a range of frequencies. Age and mating status inßuenced the overall responsiveness to sound, whereas male size did not. There were no interactions between these factors and sound frequency. A Centers for Disease Control and Prevention miniature light trap modiÞed to produce a tone of 465 Hz collected 76.2% of Ae. aegypti males in laboratory cages, and 49.7% of males in a greenhouse enclosure. In two sets of experiments in laboratory cages, 50.8 and 46.5% of male Ae. polynesiensis were captured with a trap producing a tone of 440 Hz. In the Þeld, CDC miniature light traps or BG-Sentinel traps Þtted with a portable speaker producing tones of 440 or 465 Hz captured signiÞcantly more male Ae. polynesiensis when placed near a male swarm than did traps that did not produce sound. When the trap was placed at a distance of 16.5 m from the nearest swarm, there was no signiÞcant difference in the number of males caught between control and sound-producing traps. The numbers of Ae. aegypti males captured were low under all circumstances in the Þeld.

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Monitoring Temporal Abundance and Spatial Distribution ofAedes polynesiensisUsing BG-Sentinel Traps in Neighboring Habitats on Raiatea, Society Archipelago, French Polynesia

Cited by 18 publications

References 22 publications

Population Studies of the Filarial VectorAedes polynesiensis(Diptera: Culicidae) in Two Island Settings of French Polynesia

Population Studies of the Filarial VectorAedes polynesiensis(Diptera: Culicidae) in Two Island Settings of French Polynesia

Open Release of Male Mosquitoes Infected with a Wolbachia Biopesticide: Field Performance and Infection Containment

Determinants of Male <I>Aedes aegypti</I> and <I>Aedes polynesiensis</I> (Diptera: Culicidae) Response to Sound: Efficacy and Considerations for Use of Sound Traps in the Field

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