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Anopheles arabiensis oviposition site selection in response to habitat persistence and associated physicochemical parameters, bacteria and volatile profiles
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH).
Human Hlth Theme, Int Ctr Insect Physiol & Ecol, Thomas Odhiambo Campus, Mbita, Kenya..
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH).
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH).
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2019 (English)In: Medical and Veterinary Entomology, ISSN 0269-283X, E-ISSN 1365-2915, Vol. 33, no 1, p. 56-67Article in journal (Refereed) Published
Abstract [en]

A better understanding of the oviposition behaviour of malaria vectors might facilitate the development of new vector control tools. However, the factors that guide the aquatic habitat selection of gravid females are poorly understood. The present study explored the relative attractiveness of similar artificial ponds (0.8 m(2)) aged at varying lengths prior to opening in such a way that wild Anopheles arabiensis could choose between ponds that were freshly set up, or were aged 4 or 17 days old, to lay eggs. Physicochemical parameters, bacterial profile and volatile organic compounds emitted from ponds were investigated over three experimental rounds. Fresh ponds contained on average twice as many An. arabiensis instar larvae (mean 50, 95% confidence interval (CI) = 29-85) as the ponds that had aged 4 days (mean = 24, 95% CI = 14-42) and 17 days (mean = 20, 95% CI: 12-34). Fresh ponds were associated with a significantly higher turbidity combined with higher water temperature, higher nitrite levels and a lower pH and chlorophyll level than the older ponds. Round by round analyses suggested that bacteria communities differed between age groups and also that 4-heptanone, 2-ethylhexanal and an isomer of octenal were exclusively detected from the fresh ponds. These characteristics may be useful with respect to developing attract and kill strategies for malaria vector control.

Place, publisher, year, edition, pages
WILEY , 2019. Vol. 33, no 1, p. 56-67
Keywords [en]
Malaria, oviposition, denaturing gradient gel electrophoresis, volatile compounds, physicochemical parameter
National Category
Microbiology
Identifiers
URN: urn:nbn:se:kth:diva-244502DOI: 10.1111/mve.12336ISI: 000457739700005PubMedID: 30168151Scopus ID: 2-s2.0-85052815471OAI: oai:DiVA.org:kth-244502DiVA, id: diva2:1299722
Note

QC 20190328

Available from: 2019-03-28 Created: 2019-03-28 Last updated: 2019-03-28Bibliographically approved

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Eneh, LyndaBorg-Karlson, Anna-KarinRajarao, Gunaratna KuttuvaLindh, Jenny

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