Journal of Chemical Ecology

, Volume 34, Issue 11, pp 1430–1436

Regulation of Oviposition in Anopheles gambiae s.s.: Role of Inter- and Intra-Specific Signals

Authors

  • Leunita A. Sumba
    • International Centre of Insect Physiology and Ecology (ICIPE)
    • Kenya Water Institute (KEWI)
  • C. Brandon Ogbunugafor
    • International Centre of Insect Physiology and Ecology (ICIPE)
    • Yale University School of Medicine
  • Arop L. Deng
    • Department of Biological SciencesEgerton University
    • International Centre of Insect Physiology and Ecology (ICIPE)
Article

DOI: 10.1007/s10886-008-9549-5

Cite this article as:
Sumba, L.A., Ogbunugafor, C.B., Deng, A.L. et al. J Chem Ecol (2008) 34: 1430. doi:10.1007/s10886-008-9549-5

Abstract

Females of Anopheles gambiae Giles normally oviposit in a large number of fresh, small, sunlit, and spatially spread temporary pools. Such pools are associated with lower levels of predation compared to large, longer-lasting habitats. We compared oviposition levels on preferred (water collected from natural anopheline larval habitats) and non-preferred (distilled water) aqueous substrates by gravid females that contained different densities of conspecific eggs or early and late instar larvae. The presence of conspecific larvae, but not eggs, had a positive or negative effect on the ovipositional responses of gravid An. gambiae females, depending on the quality (preferred or non-preferred by the mosquito) of the oviposition water and the density of larvae. Presence of larvae, at all densities, in distilled water deterred oviposition. However, in natural anopheline pool water, a low density of larvae increased oviposition, whereas a higher density inhibited oviposition. Our results suggest that two signals produced by this mosquito may be involved in regulating oviposition: a volatile pheromone emitted by conspecific larvae, which augments the effect of a volatile signal emitted by preferred habitats, and a non-olfactory cue associated with high densities of larvae that deters oviposition.

Keywords

Anopheles gambiae GilesOvipositionIntra-specific signalsLarval pheromone

Copyright information

© Springer Science+Business Media, LLC 2008