The effects of temperature and shading on mortality and development rates of Aedes aegypti (Diptera: Culicidae)

Febrianne Sukiato, Ryan J. Wasserman, Su Chern Foo, Robyn F. Wilson, Ross N. Cuthbert

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Urbanization has caused an increase in favorable habitats for Aedes aegypti (Diptera: Culicidae), given their ability to reproduce in small and often non-degradable artificial water-containers. While much work has been done on Ae. aegypti biology and ecology in urban landscapes, the role of shading on immature stages as an independent factor from temperature, and any possible interactions between these factors, remains unexamined. We assessed how temperature and shading affected egg hatch-rate, larval/pupal mortality, and larval development to adult stage under different factorial temperature (28; 31; 34; 37; 40° C) and shade (0%, 3,100 lux; 40%, 1,860 lux; 75%, 775 lux; 100%, 0 lux) regimes. Hatch-rate was significantly lower at 37° C (57 %), and no eggs hatched at 40° C. There was no significant effect caused by shading on hatchability. Larval and pupal mortality at 37° C was significantly higher (35%) compared to lower temperature groups, while the effects of shading were emergent at low temperatures. Developmental times from hatching to adult emergence were significantly reduced with increasing temperatures and with greater light exposures. The eco-physiological response of Ae. aegypti larvae to temperature and light regimes suggest a photosensitivity previously unstudied in this species.
Original languageEnglish
Pages (from-to)264-270
Number of pages7
JournalJournal of Vector Ecology
Volume44
Issue number2
Early online date15 Nov 2019
DOIs
Publication statusPublished - Dec 2019

Keywords

  • Ecology
  • Ecology, Evolution, Behavior and Systematics

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