Air versus water temperature of aquatic habitats in Delhi: Implications for transmission dynamics of Aedes aegypti

Kumar, Gaurav; Pande, Veena; Pasi, Shweta; Ojha, Vijay Prakash; Dhiman, R. C.

doi:10.4081/gh.2018.707

Cited by 11 publications

(6 citation statements)

References 20 publications

(24 reference statements)

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“…For instance, it has been shown that the average diurnal water temperature in plastic containers can reach up to 35.6 ºC, exceeding the thermal optima range of 15–35 ºC for the development of Ae. aegypti immatures [ 56 , 57 ]. This suggests that plastic containers may become unsuitable larval sites depending on their daily amount of sunlight exposure.…”

Section: Discussionmentioning

confidence: 99%

Risk factors for occurrence and abundance of Aedes aegypti and Aedes bromeliae at hotel compounds in Zanzibar

et al. 2021

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Background A field survey was performed to investigate local environmental factors promoting occurrence and abundance of Aedes aegypti and Ae. bromeliae mosquitoes at hotel compounds in the south-east coastal region of Zanzibar Island. Methods The potential risk factors were determined using generalized linear mixed models. Aedes (Stegomyia) spp. indices such as container index (CI) and pupae per container (PPC) index were also estimated. Results Aedes aegypti and Ae. bromeliae were the most abundant vector species, accounting for 70.8% of all Aedes mosquitoes collected. The highest CI was observed for plastic containers irrespective of the season, whereas the highest PPC was observed for coconut shells and aluminium containers in the rainy and dry seasons, respectively. The risk of Aedes mosquito occurrence and abundance were significantly associated with presence of plastic containers, coconut shells, used tyres and steel containers. These were discarded in shaded places, in the open and gardens, or found in plant nurseries. Conclusion This study shows that Aedes species of global health significance occur at hotel compounds on this part of Zanzibar Island. The occurrence and abundance are sustained by the presence of abundant and poorly managed solid wastes and containers used for gardening tasks. This highlights an urgent need for the adoption of area-wide environmentally sustainable Aedes mosquito management interventions that also integrate solid waste management and ornamental plant production practices for reducing the risk of arboviral disease epidemics. Graphical Abstract

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Section: Discussionmentioning

confidence: 99%

Risk factors for occurrence and abundance of Aedes aegypti and Aedes bromeliae at hotel compounds in Zanzibar

et al. 2021

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“…The range of temperatures represented the full range at which each species can persist when reared individually, including temperatures at which both species are found in the field (Brady et al 2014, Sinka et al 2020). For example, in Delhi, where both species are found, temperatures of mosquito larval habitat range from 14.3° to 36.1°C, depending on the habitat type (Kumar et al 2018). The strain of Ae.…”

Section: Methodsmentioning

confidence: 99%

Assessing temperature‐dependent competition between two invasive mosquito species

Evans

Drake

Jones

et al. 2021

Ecological Applications

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Invasive mosquitoes are expanding their ranges into new geographic areas and interacting with resident mosquito species. Understanding how novel interactions can affect mosquito population dynamics is necessary to predict transmission risk at invasion fronts. Mosquito life‐history traits are extremely sensitive to temperature, and this can lead to temperature‐dependent competition between competing invasive mosquito species. We explored temperature‐dependent competition between Aedes aegypti and Anopheles stephensi, two invasive mosquito species whose distributions overlap in India, the Middle East, and North Africa, where An. stephensi is currently expanding into the endemic range of Ae. aegypti. We followed mosquito cohorts raised at different intraspecific and interspecific densities across five temperatures (16–32°C) to measure traits relevant for population growth and to estimate species’ per capita growth rates. We then used these growth rates to derive each species’ competitive ability at each temperature. We find strong evidence for asymmetric competition at all temperatures, with Ae. aegypti emerging as the dominant competitor. This was primarily because of differences in larval survival and development times across all temperatures that resulted in a higher estimated intrinsic growth rate and competitive tolerance estimate for Ae. aegypti compared to An. stephensi. The spread of An. stephensi into the African continent could lead to urban transmission of malaria, an otherwise rural disease, increasing the human population at risk and complicating malaria elimination efforts. Competition has resulted in habitat segregation of other invasive mosquito species, and our results suggest that it may play a role in determining the distribution of An. stephensi across its invasive range.

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“…As the species breeds in small containers (Stefopoulou et al, 2018), the water temperature can quickly reach high values, even if the air temperature is lower (Kumar et al, 2018). During spring, the temperature conditions often allow a complete development from egg to adult in 2-3 weeks; however, clear field information on the mean duration of a generation time is still missing.…”

Section: Articlementioning

confidence: 99%

Seasonality and timing of peak abundance of <em>Aedes albopictus</em> in Europe: Implications to public and animal health

et al. 2021

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Aedes albopictus is a known vector of dengue and chikungunya. Understanding the population dynamics characteristics of vector species is of pivotal importance to optimise surveillance and control activities, to estimate risk for pathogen-transmission, and thus to enhance support of public health decisions. In this paper we used a seasonal activity model to simulate the start (spring hatching) and end (autumn diapause) of the vector season. In parallel, the peak abundance of the species was assessed using both VectorNet field survey data complemented with field studies obtained from literature across the Mediterranean Basin. Our results suggest that spring hatching of eggs in the current distribution area can start at the beginning of March in southern Europe and in April in western Europe. In northern Europe, where the species is not (yet) present, spring hatching would occur from late April to late May. Aedes albopictus can remain active up to 41 weeks in southern Europe whilst the climatic conditions in northern Europe are limiting its potential activity to a maximum of 23 weeks. The peak of egg density is found during summer months from end of July until end of September. During these two months the climatic conditions for species development are optimal, which implies a higher risk for arbovirus transmission by Ae. albopictus and occurrence of epidemics.

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Air versus water temperature of aquatic habitats in Delhi: Implications for transmission dynamics of Aedes aegypti

Cited by 11 publications

References 20 publications

Risk factors for occurrence and abundance of Aedes aegypti and Aedes bromeliae at hotel compounds in Zanzibar

Risk factors for occurrence and abundance of Aedes aegypti and Aedes bromeliae at hotel compounds in Zanzibar

Assessing temperature‐dependent competition between two invasive mosquito species

Seasonality and timing of peak abundance of <em>Aedes albopictus</em> in Europe: Implications to public and animal health

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