The effect of color and environment on mosquito oviposition and biodiversity under semi-field conditions

Moazzeni, Parisa; Tangsiri, Mona; Soltan-Alinejad, Parisa; Shahriari-Namdadi, Marzie; Daghighi, Elaheh; Soltani, Aboozar

doi:10.1007/s42690-023-01023-5

Cited by 2 publications

(2 citation statements)

References 28 publications

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“…The blue colour was chosen because it was previously shown to positively affect egg laying in Cx. quinquefasciatus (Moazzeni et al, 2023). Besides being dark in colour, blue is the second-most preferred colour demonstrated to positively affect oviposition in mosquitoes Moazzeni et al, 2023).…”

Section: Analysing Oviposition Site Selectionmentioning

confidence: 99%

“…quinquefasciatus (Moazzeni et al, 2023). Besides being dark in colour, blue is the second-most preferred colour demonstrated to positively affect oviposition in mosquitoes Moazzeni et al, 2023). A second transparent cup (120 ml; ÖoB, Lund, Sweden), with six 2.5 mm diameter perforations in the bottom, was placed within the blue plastic cup to greatly reduce inputs from sensory modalities other than olfaction (Fig.…”

Section: Analysing Oviposition Site Selectionmentioning

confidence: 99%

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Oviposition site selection in mosquitoes : the role of conspecific larvae, heterospecific larvae and microbes

Khan

2024

Acta Universitatis Agriculturae Sueciae

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In mosquitoes, the evaluation and selection of oviposition sites is critical for the growth, development and survival of the offspring. Gravid mosquitoes rely primarily on olfactory cues emanating from breeding water containing, e.g., intra- and interspecific aquatic stages, as well as bacteria for this purpose. In this thesis, I investigated the odour-mediated mechanisms regulating the oviposition preferences of Aedes aegypti and Culex quinquefasciatus to intra- and interspecific aquatic stages and the commensal Klebsiella sp., bacterium. Using multi- and dual-choice oviposition assays, in combination with chemical and electrophysiological assays, volatile organic compounds (VOCs) associated with intraspecific aquatic stages of Ae. aegypti were identified and shown to regulate oviposition site choice and egg laying in a stage- and dose-dependent manner (Paper II). Using a similar approach, oviposition site selection by Ae. aegypti and Cx. quinquefasciatus were shown to be regulated by hydrocarbons emitted by interspecific 4th instar larvae, emphasising that these VOCs are able to regulate niche separation and competitive exclusion between these species (Paper III). The bacteria, Klebsiella sp., constitutes a major food resource for Ae. aegypti larvae, and gravid mosquitoes are attracted to this resource and the VOCs emitted by the bacteria (Paper IV), which strengthens their commensal interaction. This thesis identified the odour-mediated mechanisms by which mosquitoes detect intra- and interspecific aquatic stages, as well as mosquitoassociated bacteria. Furthermore, results of this study provide functional evidence that hydrocarbons, which previously have not been shown to regulate odourmediated behaviours in mosquitoes, play an important role in regulating oviposition. Besides, adding to our understanding of factors regulating oviposition preference in mosquitoes, this thesis has identified VOCs that may be evaluated under field conditions for their assessment as complementary vector control tools.

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Section: Analysing Oviposition Site Selectionmentioning

confidence: 99%

Section: Analysing Oviposition Site Selectionmentioning

confidence: 99%

Oviposition site selection in mosquitoes : the role of conspecific larvae, heterospecific larvae and microbes

Khan

2024

Acta Universitatis Agriculturae Sueciae

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Behavioural variation in background colour matching and the effect of social environment in rock-pool mosquitoes

Cordeschi,

Porretta,

Canestrelli

2024

Preprint

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Several animal species conceal themselves from potential predators by actively choosing environmental patches that best match body colouration and chromatic patterns. Growing evidence shows that a variety of contexts and conditions can affect this background choice behaviour, yet the extent of this variety remains largely underexplored. Here, we explore the effect of disturbance and social environment on background colour choice behaviour in the rock-pool mosquito Aedes mariae. We exposed single individuals and groups of individuals to experimental arenas made of dark and bright patches, and recorded individuals' colour preferences when alone and within groups, as well as before and after a disruptive event. We found a marked prevalence of individuals favouring a dark background and an among-individual variation in choice over replicated trials. Moreover, we observed a non-significant effect of disturbance but a significant role of the social environment. In fact, being caged in groups significantly increased the proportion of mosquitoes choosing the dark background. Our results provide strong evidence of a background colour choice in Ae. mariae, a density-dependence of this choice, and a non-negligible inter-individual variation in this behaviour. Overall, these findings offer intriguing insights into the background choice behavioural variation and flexibility in mosquitoes.

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The effect of color and environment on mosquito oviposition and biodiversity under semi-field conditions

Cited by 2 publications

References 28 publications

Oviposition site selection in mosquitoes : the role of conspecific larvae, heterospecific larvae and microbes

Oviposition site selection in mosquitoes : the role of conspecific larvae, heterospecific larvae and microbes

Behavioural variation in background colour matching and the effect of social environment in rock-pool mosquitoes

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