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Regulation of Aedes aegypti population dynamics in field systems: quantifying direct and delayed density dependence.


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.

SUBMITTER: Walsh RK 

PROVIDER: S-EPMC3748491 | biostudies-literature | 2013 Jul

REPOSITORIES: biostudies-literature

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Regulation of Aedes aegypti population dynamics in field systems: quantifying direct and delayed density dependence.

Walsh Rachael K RK   Aguilar Cristobal L CL   Facchinelli Luca L   Valerio Laura L   Ramsey Janine M JM   Scott Thomas W TW   Lloyd Alun L AL   Gould Fred F  

The American journal of tropical medicine and hygiene 20130513 1


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 Mex  ...[more]

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