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BMC Research Notes

, 7:231

First Online: 11 April 2014Received: 25 January 2013Accepted: 04 April 2014DOI: 10.1186-1756-0500-7-231

Cite this article as: Gotifrid, G.M., Urasa, F.M., Katunzi, G. et al. BMC Res Notes 2014 7: 231. doi:10.1186-1756-0500-7-231


BackgroundWe investigated the hatchability rates of freshly laid Anopheles gambiae s.s. eggs in presence of third instars larvae. These experiments were conducted using 30 eggs in larval densities of 20, 60 and 100 larvae in microcosms. These experiments were designed to evaluate the eggs hatchability in habitats with late larvae instars of the same species experimental or no larvae at all control. Freshly laid eggs of An.gambiae s.s. were washed in microcosms containing larvae of third instars in different three densities 20, 60 and 100 and likewise in control microcosms without larvae. Eggs hatchability was monitored twice daily until no more first instar larvae emerged. The numbers of first instars larvae were recorded daily and lost eggs were considered preyed upon by third instars.

FindingsThe findings of this study showed that egg hatchability was significantly influenced by larval density.

ConclusionThe findings of this study suggest that presence of larvae in habitats may significantly reduce hatchability of eggs.

KeywordsAnopheles gambiae s.s Microcosms Hatchability Larvae Electronic supplementary materialThe online version of this article doi:10.1186-1756-0500-7-231 contains supplementary material, which is available to authorized users.

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Autor: Gilbert M Gotifrid - Felister M Urasa - Gerald Katunzi - Jacob G Yarro - Stephen Munga - Eliningaya J Kweka


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