Ochlerotatus albifasciatus in rain pools of Buenos Aires: seasonal dynamics and relation to environmental variables

Fischer, Sylvia; Marinone, María Cristina; Schweigmann, Nicolás

doi:10.1590/s0074-02762002000600002

Cited by 27 publications

(35 citation statements)

References 13 publications

(10 reference statements)

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“…The low abundance of immature stages of O. albifasciatus in Buenos Aires city during the summer has been observed in previous studies, and possible explanations are excessively high temperatures in the shallow urban pools, and a low survival of eggs from the previous seasons. The presence of this species in autumn and winter poses the possibility of yearly fall recolonization, either by the remaining egg-bank or the dispersion of adults from adjacent areas (Fischer et al, 2002). The present article contributes to evidence of the latter option.…”

Section: Discussionmentioning

confidence: 69%

“…of O. albifasciatus (Fischer et al, 2002), while in the summer a minimum of 25-30 mm is necessary to allow O. albifasciatus to complete their immature development (Fontanarrosa et al, 2000). Once the eggs have hatched, the development time of immature stages ranges from 6 days at 24°C to 32 days at 13°C (Ludueña Almeida and Gorla, 1995;Fontanarrosa et al, 2000;Fava et al, 2001;Campos and Sy, 2003).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Probable trajectories associated with the transport of Ochlerotatus albifasciatus during a strong wind event in Buenos Aires city (Argentina)

Bejarán¹,

Fischer²,

Garin³

et al. 2008

Meteorological Applications

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Because of its capacity to infect human beings and domestic animals with a number of different viruses, the study of the mosquito Ochlerotatus albifasciatus (Macquart, 1938, (Diptera: Culicidae)) assumes great importance from the point of view of sanitation. It is a well-known fact that the abundance of this species peaks after drought periods in the provinces of Buenos Aires and Cordoba. This article aims at explaining the presence of the high abundance of adult O. albifasciatus in Buenos Aires city in February 2005. As no breeding immatures were recorded during the previous weeks, the most likely hypothesis was that mosquitoes entered the city from breeding sites located in the outskirts. Wind observations, the existing knowledge on this species biology, atmospheric dynamic models, and meteorological data were used to support this hypothesis and identify the sources.Mass transport of these individuals was apparently the consequence of a convective process. It was demonstrated that the occurrence of a convective process transported air masses from the periphery towards the City of Buenos Aires. Air-parcel trajectories, Ezeiza radar images, and the flood zones observed in satellite images indicated that the source was located in the lowlands of Ezeiza in the Rio Matanza basin, some 50 km to the southwest of the City. The evidence suggests that O. albifasciatus is transported by wind, and the trajectory models are a very useful tool to locate the sources of proliferation of these insects.

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Section: Discussionmentioning

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Probable trajectories associated with the transport of Ochlerotatus albifasciatus during a strong wind event in Buenos Aires city (Argentina)

Bejarán¹,

Fischer²,

Garin³

et al. 2008

Meteorological Applications

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“…The influence of climatic parameters on culicid larval abundance has been reported previously, presenting different results in many cases. For instance, the abundance of C. (C.) quinquefasciatus in the city of Córdoba (Argentina) was not correlated with variables such as temperature and rainfall (ALMIRÓN; BREWER, 1996), while in Buenos Aires, the larval plethora of Culex (Culex) pipiens was positively associated with the mean weekly temperature (FISCHER et al, 2000;SCHWEIGMANN, 2004).…”

Section: Discussionmentioning

confidence: 99%

Occurrence of immature forms of culicids (Insecta: Diptera) in the northeastern region of Brazil

Silva

Sérvio

Ramos

et al. 2014

Rev. Bras. Parasitol. Vet.

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The Culicidae family is represented by approximately 3,610 species, among which many are involved in transmission of pathogens and parasites, thus presenting great medical-veterinary importance. In Brazil, the state of Pernambuco is considered an endemic area for many diseases vectored by mosquitoes, such as human and canine filariasis, caused by Wuchereria bancrofti and Dirofilaria immitis, respectively. The aim of this study was to evaluate the occurrence of immature forms of culicids, over an one-year period, in a specific area of northeastern region of Brazil. Culicids larvae were collected from traps located on the ground and in treetops, between october 2012 and september 2013. Ten different species of culicids were identified. The greatest number of larvae were collected in september 2013 and the lowest number in december 2012. Stegomyia (Stegomyia) albopicta (46.45%; 5,908/12,718), Culex (Culex) maxi (35.56%; 4,523/12,718) and Limatus durhamii (12.58%; 1,600/12,718) were the most frequent species. The human and animal populations living in the study area are exposed to culicids and transmission agents throughout the year, especially after the rains. Therefore, control and prevention measures against culicids must be adopted in the study area.Keywords: Mosquitoes, seasonal, abundance, vectors, Culicidae. ResumoA família Culicidae é representada por aproximadamente 3.610 espécies, dentre as quais muitas estão envolvidas na transmissão de patógenos e parasitos, apresentando assim grande importância médico-veterinária. No Brasil, o Estado de Pernambuco é considerado área endêmica para diversas doenças transmitidas por mosquitos como, por exemplo, as filarioses humana e canina causadas pela Wuchereria bancrofti e Dirofilaria immitis, respectivamente. O objetivo deste estudo foi avaliar a ocorrência de formas imaturas de culicídeos durante um ano em uma área do Nordeste do Brasil. Larvas de culicídeos foram coletadas em armadilhas localizadas no solo e copa de árvores, no período de outubro de 2012 a setembro de 2013. Dez diferentes espécies de culicídeos foram identificadas, sendo o maior número de larvas coletadas em setembro de 2013 e o menor número em dezembro de 2012. Stegomyia (Stegomyia) albopicta (46,45%; 5.908/12.718), Culex (Culex) maxi (35,56%; 4.523/12.718) e Limatus durhamii (12,58%; 1.600/12.718) foram as espécies mais frequentes. A população humana e animal residente na área de estudo é exposta aos culicídeos e aos agentes por eles veiculados durante todo o ano, sobretudo após o período de chuvas. Portanto, medidas de controle e prevenção dos culicídeos devem ser adotadas na área estudada.

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“…affect the structure of the mosquito assemblages (Mohrig 1969;Paradise 2000;Becker et al 2003;Schäfer 2004). The vegetation affects directly the organization of mosquito assemblages by the water surface cover of the floating plant species (Fischer & Schweigmann 2004). The cover of the floating vegetation above 50-60% obstructs expiration of larvae taking on the water surface.…”

Section: Introductionmentioning

confidence: 99%

“…The cover of the floating vegetation above 50-60% obstructs expiration of larvae taking on the water surface. However, the structure of floating 878 N. Bauer et al plant species operates as a hiding-place of the larvae at lower percentual cover (in water bodies which enable the colonization of predators) (Fischer & Schweigmann 2004). Sattler et al (2005) stated that larval assemblages are not related to a single habitat category (e.g., plant association).…”

Section: Introductionmentioning

confidence: 99%

Connections between the habitat pattern and the pattern of the mosquito larval assemblages

Bauer

Kenyeres²,

Tóth³

et al. 2011

Biologia

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Aim of the study was to find relations between the habitat pattern and the pattern of mosquito assemblages. Microhabitats of shallow lakes, riversides, forests and humid grasslands were studied. 1,239 samples (mosquito assemblages and potential habitat variables) were taken in different habitats in Hungary. Cluster analysis, Pearson correlation, MDS and PCA were used. Results showed that the mosquito larval assemblages are related to characteristic vegetation types: (a) reed beds and sedge-marshes with temporary character; (b) reed beds and/or sedge-marshes with permanent character; (c) the fresh grasslands characterized by temporary water supply; (d) the marginal zone of the open permanent waters (e.g., lakes); (e) the closed forest vegetation types of temporary water supply. Presence of mosquito species and their larval assemblages is dependent on characteristic habitat-mosaics. Mapping of this background pattern covers the mapping of mosquito assemblages.

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Ochlerotatus albifasciatus in rain pools of Buenos Aires: seasonal dynamics and relation to environmental variables

Cited by 27 publications

References 13 publications

Probable trajectories associated with the transport of Ochlerotatus albifasciatus during a strong wind event in Buenos Aires city (Argentina)

Probable trajectories associated with the transport of Ochlerotatus albifasciatus during a strong wind event in Buenos Aires city (Argentina)

Occurrence of immature forms of culicids (Insecta: Diptera) in the northeastern region of Brazil

Connections between the habitat pattern and the pattern of the mosquito larval assemblages

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