Age-dependent survival of the dengue vector Aedes aegypti (Diptera: Culicidae) demonstrated by simultaneous release-recapture of different age cohorts

J Med Entomol. 2008 Mar;45(2):307-13. doi: 10.1603/0022-2585(2008)45[307:asotdv]2.0.co;2.

Abstract

The assumption that mosquito survival remains constant and that it is independent of age was tested with free-ranging Aedes aegypti (L.) (Diptera: Culicidae) by using a "synthetic cohort" mark-release-recapture method. Mosquito age cohorts (1-2, 3-4, and 19-20 d) were released simultaneously in homes in rural Thai villages during dry and rainy seasons (2002). Significant age-dependent effects were detected during the dry and rainy seasons. More young than older mosquitoes were recaptured (1-4 versus 5-20 d). The best predictive fit for recaptures was obtained using a quadratic function of age. Our results provide the first field-based evidence for age-dependent Ae. aegypti mortality in which the death rate increases with advancing age and highlight the need for research on ecological and epidemiological aspects of this process.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Aedes / physiology*
  • Age Factors
  • Animals
  • Body Size / physiology
  • Female
  • Male
  • Population Dynamics