Differences in performance of Aedes aegypti larvae raised at different densities in tires and ovitraps under field conditions in Argentina

Maciá, Arnaldo

doi:10.3376/1081-1710(2006)31[371:dipoaa]2.0.co;2

Cited by 24 publications

(30 citation statements)

References 2 publications

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“…While the model could be altered to consider density-dependent effects in other life stages, we choose to consider only larval density-dependent mortality because of the observed relationship between high-density Ae. aegypti larval populations and increased mortality [37]–[40]. Juveniles emerge as mature adults at a per capita rate ν .…”

Section: Methodsmentioning

confidence: 99%

A Reduce and Replace Strategy for Suppressing Vector-Borne Diseases: Insights from a Deterministic Model

2013

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Genetic approaches for controlling disease vectors have aimed either to reduce wild-type populations or to replace wild-type populations with insects that cannot transmit pathogens. Here, we propose a Reduce and Replace (R&R) strategy in which released insects have both female-killing and anti-pathogen genes. We develop a mathematical model to numerically explore release strategies involving an R&R strain of the dengue vector Aedes aegypti. We show that repeated R&R releases may lead to a temporary decrease in mosquito population density and, in the absence of fitness costs associated with the anti-pathogen gene, a long-term decrease in competent vector population density. We find that R&R releases more rapidly reduce the transient and long-term competent vector densities than female-killing releases alone. We show that releases including R&R females lead to greater reduction in competent vector density than male-only releases. The magnitude of reduction in total and competent vectors depends upon the release ratio, release duration, and whether females are included in releases. Even when the anti-pathogen allele has a fitness cost, R&R releases lead to greater reduction in competent vectors than female-killing releases during the release period; however, continued releases are needed to maintain low density of competent vectors long-term. We discuss the results of the model as motivation for more detailed studies of R&R strategies.

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Section: Methodsmentioning

confidence: 99%

A Reduce and Replace Strategy for Suppressing Vector-Borne Diseases: Insights from a Deterministic Model

2013

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“…Field experiments using ovitraps in temperate localities suggested that the presence of conspecific eggs and/or immatures did not affect oviposition activity (Campos & Maciá 1996, Almirón et al 1999. Recently, Maciá (2006) measured Ae. aegypti fitness components (i.e., pupal weight, total biomass, survivorship, development time and female fecundity) in relation to larval density and container type.…”

Section: Aedes Spp In Argentina: State Of Artmentioning

confidence: 99%

Aedes aegypti, Aedes albopictus, and dengue in Argentina: current knowledge and future directions

Vezzani

Carbajo

2008

Mem. Inst. Oswaldo Cruz

130

100

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“…In a review of the literature on larval density dependence Legros and others 17 found that there are a number of laboratory and semi-field studies examining density dependence, [18][19][20][21][22][23][24] but there were no field studies that examined density dependence in mixed age larval groups at the densities found in the field. Uncertainty analysis 25 on a stochastic spatial model of Ae.…”

Section: Introductionmentioning

confidence: 99%

Regulation of Aedes aegypti Population Dynamics in Field Systems: Quantifying Direct and Delayed Density Dependence

Walsh¹,

Aguilar²,

Facchinelli³

et al. 2013

The American Journal of Tropical Medicine and Hygiene

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Abstract. Transgenic strains of Aedes aegypti have been engineered to help control transmission of dengue virus. Although resources have been invested in developing the strains, we lack data on the ecology of mosquitoes that could impact the success of this approach. Although studies of intra-specific competition have been conducted using Ae. aegypti larvae, none of these studies examine mixed age cohorts at densities that occur in the field, with natural nutrient levels. Experiments were conducted in Mexico to determine the impact of direct and delayed density dependence on Ae. aegypti populations. Natural water, food, and larval densities were used to estimate the impacts of density dependence on larval survival, development, and adult body size. Direct and delayed density-dependent factors had a significant impact on larval survival, larval development, and adult body size. These results indicate that control methods attempting to reduce mosquito populations may be counteracted by density-dependent population regulation.

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Differences in performance of Aedes aegypti larvae raised at different densities in tires and ovitraps under field conditions in Argentina

Cited by 24 publications

References 2 publications

A Reduce and Replace Strategy for Suppressing Vector-Borne Diseases: Insights from a Deterministic Model

A Reduce and Replace Strategy for Suppressing Vector-Borne Diseases: Insights from a Deterministic Model

Aedes aegypti, Aedes albopictus, and dengue in Argentina: current knowledge and future directions

Regulation of Aedes aegypti Population Dynamics in Field Systems: Quantifying Direct and Delayed Density Dependence

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