Effect of temperature on life history traits during immature development of Aedes aegypti and Culex quinquefasciatus (Diptera: Culicidae) from Córdoba city, Argentina

Grech, Marta G.; Sartor, Paolo; Almirón, Walter Ricardo; Ludueña-Almeida, Francisco

doi:10.1016/j.actatropica.2015.02.010

Cited by 47 publications

(47 citation statements)

References 23 publications

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“…The pattern ( i ) is consistent with the fact that the southern limit of distribution of the A. aegypti in South America, is given in literature by the line joining the city of Tacna in Southern Peru (17°36′ S, 70°12′ W) to the city of Bahía Blanca in Argentina (38°43′ S, 62°16′ W), with a winter isotherm of 10°C [29, 30]. The impact of lower temperatures on species is a slow down of development, generating smaller individuals, decreasing the capacity of attack, and consequently, its efficiency as a vector [29, 30, 33]. Considering that the number of new cases of dengue is related to the density of vectors or their efficiency, our results are within the geographic limits.…”

Section: Discussionmentioning

confidence: 99%

“…The limits of geographical distribution of the Aedes species seem to be related to temperature [27, 30], which is closely connected with latitude. Temperature is a major extrinsic factor affecting many population parameters of insects [33]. Some studies focus on the effect of temperature on the A. aegypti such as its population dynamics [30], life history [33], development of mosquitoes [34] and larval development [35].…”

Section: Introductionmentioning

confidence: 99%

“…Temperature is a major extrinsic factor affecting many population parameters of insects [33]. Some studies focus on the effect of temperature on the A. aegypti such as its population dynamics [30], life history [33], development of mosquitoes [34] and larval development [35]. In general, the temperature is not related with longitude, which could imply that the dengue incidence does not depend on the longitude if the population were homogeneous.…”

Section: Introductionmentioning

confidence: 99%

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Spatial patterns of dengue cases in Brazil

et al. 2017

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Dengue infection plays a central role in our society, since it is the most prevalent vector-borne viral disease affecting humans. We statistically investigated patterns concerning the spatial spreading of dengue epidemics in Brazil, as well as their temporal evolution in all Brazilian municipalities for a period of 12 years. We showed that the distributions of cases in municipalities follow power laws persistent in time and that the infection scales linearly with the population of the municipalities. We also found that the average number of dengue cases does not have a clear dependence on the longitudinal position of municipalities. On the other hand, we found that the average distribution of cases varies with the latitudinal position of municipalities, displaying an almost constant growth from high latitudes until reaching the Tropic of Capricorn leveling to a plateau closer to the Equator. We also characterized the spatial correlation of the number of dengue cases between pairs of municipalities, where our results showed that the spatial correlation function decays with the increase of distance between municipalities, following a power-law with an exponential cut-off. This regime leads to a typical dengue traveling distance. Finally, we considered modeling this last behaviour within the framework of a Edwards-Wilkinson equation with a fractional derivative on space.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spatial patterns of dengue cases in Brazil

et al. 2017

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“…(); c, Grech et al. (); d, Hawley (); e, Johnson (); f, Faraj et al. (); g, Verdonschot and Besse‐Lototskaya ().…”

Section: Model Structure and Demographic Parametersmentioning

confidence: 99%

Modelling the effects of spatial heterogeneity and temporal variation in extinction probability on mosquito populations

Alcalay

Tsurim

Ovadia

2017

Ecological Applications

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Spatial synchrony plays an important role in dictating the dynamics of spatial and stage-structured populations. Here we argue that, unlike the Moran effect where spatial synchrony is driven by exogenous factors, spatial correlation in intrinsic/local-scale processes can affect the level of spatial synchrony among distinct sub-populations, and therefore the persistence of the entire population. To explore this mechanism, we modelled the consequences of spatial heterogeneity in aquatic habitat quality, and that of temporal variation in local extinction probability, on the persistence of stage-structured mosquito populations. As a model system, we used two widely distributed mosquito species, Aedes albopictus and Culex pipiens, both key vectors of a range of infectious diseases. Spatial heterogeneity in aquatic habitat quality led to increased population persistence, and this pattern was more pronounced at intermediate dispersal rates, and in the long-dispersing species (C. pipiens). The highest regional persistence was obtained at high dispersal rates. This is probably because dispersal, in our model, did not carry any additional costs. Population persistence of both species was negatively correlated with increased temporal variation in local extinction probability. These differences were stronger in the short-dispersing species (A. albopictus), especially at intermediate dispersal rates. The dispersal of A. albopictus adults in each time step was limited to the nearest habitat patches, weakening the positive effect of spatial heterogeneity in aquatic habitat quality on population persistence. In contrast, C. pipiens adults could disperse into more remote sub-populations, resulting in much higher recolonization rates. Hence, the negative effect of temporal variation in local extinction probability on patch occupancy disappeared at intermediate dispersal rates. We suggest that effectively controlling these two mosquito species requires making few spatially synchronized control efforts (i.e., generating high temporal variation in local extinction probability), rather than many asynchronized local control efforts. Finally, our model can be easily fitted to other organisms characterized by complex life cycles, and it can be also used to examine alternative scenarios, including the effect of spatial configuration of local habitat patches and dispersal kernel shape on population persistence.

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“…The responses of the larval stage to varying conditions could therefore play an important role in population size regulation, and understanding these responses will contribute significantly to effective control measures. Mosquito life history traits such as larval survival, adult fecundity, longevity, susceptibility to viruses and size as well as biting behaviour have been shown to be affected by temperature, nutrition and population density during the larval stage in both field and laboratory populations 14–19 . At the centre of how the larva-environment-adult complex plays out is the role of body size in determining observed phenotypes.…”

Section: Introductionmentioning

confidence: 99%

Insecticide susceptibility of Anopheles mosquitoes changes in response to variations in the larval environment

Owusu

Chitnis

Müller

2017

Sci Rep

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Insecticide resistance threatens the success achieved through vector control in reducing the burden of malaria. An understanding of insecticide resistance mechanisms would help to develop novel tools and strategies to restore the efficacy of insecticides. Although we have substantially improved our understanding of the genetic basis of insecticide resistance over the last decade, we still know little of how environmental variations influence the mosquito phenotype. Here, we measured how variations in larval rearing conditions change the insecticide susceptibility phenotype of adult Anopheles mosquitoes. Anopheles gambiae and A. stephensi larvae were bred under different combinations of temperature, population density and nutrition, and the emerging adults were exposed to permethrin. Mosquitoes bred under different conditions showed considerable changes in mortality rates and body weight, with nutrition being the major factor. Weight is a strong predictor of insecticide susceptibility and bigger mosquitoes are more likely to survive insecticide treatment. The changes can be substantial, such that the same mosquito colony may be considered fully susceptible or highly resistant when judged by World Health Organization discriminatory concentrations. The results shown here emphasise the importance of the environmental background in developing insecticide resistance phenotypes, and caution for the interpretation of data generated by insecticide susceptibility assays.

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Effect of temperature on life history traits during immature development of Aedes aegypti and Culex quinquefasciatus (Diptera: Culicidae) from Córdoba city, Argentina

Cited by 47 publications

References 23 publications

Spatial patterns of dengue cases in Brazil

Spatial patterns of dengue cases in Brazil

Modelling the effects of spatial heterogeneity and temporal variation in extinction probability on mosquito populations

Insecticide susceptibility of Anopheles mosquitoes changes in response to variations in the larval environment

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