Primeiro registro do gênero Toxorhynchites Theobald (Diptera, Culicidae) em Mata Atlântica, Viçosa, Minas Gerais

Albeny, Daniel Simões; Rosa, Cassiano Sousa; Ataíde, Lívia Maria Silva; Vilela, Evaldo F.

doi:10.1590/s0034-737x2010000200007

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…The predatory behavior in these species occurs throughout their larval development (reviewed in Steffan & Evenhuis 1981), while adults feed solely on plants (Trpis 1972, Trimble & Smith 1978, Chowanadisai et al 1984. Larvae of Toxorhynchites are found widely distributed in natural and arti icial containers and are potential natural agents for the control of other Culicidae, such as Aedes albopictus (Skuse) and Aedes aegypti (L.) (Tikasingh & Eustace 1992, Kesavaraju & Juliano 2004, Kesavaraju et al 2007, Albeny et al 2010 and other Diptera (Lounibos & Frank 1987). In spite of Toxorhynchites relevance for biocontrol of mosquito vectors, little is known in terms of their physiology and internal morphology, including the lack of information regarding changes in fat body cells used for nutrient storage during post-embryonic development.…”

Section: Introduc Onmentioning

confidence: 99%

Changes in the fat body during the post-embryonic development of the predator Toxorhynchites theobaldi (Dyar & Knab) (Diptera: Culicidae)

Pascini¹,

Albeny²,

Ramalho-Ortigão³

et al. 2011

Neotrop. entomol.

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Several studies have focused on understanding the biochemistry and morphology of the fat body of the hematophagous mosquito Aedes aegypti (L.) (Diptera: Culicidae). In contrast, few studies, if any, have focused on morphological characters of the fat body in other mosquitoes, especially non-hematophagous taxa such as the culicid Toxorhynchites. Larvae of Toxorhynchites prey upon the larvae of other mosquito species and are used in vector mosquito control. We investigated aspects of the fat body trophocytes, including the morphometric analyses of the lipid droplets, protein granules and nuclei, during Toxorhynchites theobaldi (Dyar & Knab) post-embryonic development. Following the body weight increase from larval stage L2 to L4, the size of lipid droplets within the trophocytes also increase, and are likely the result of lipogenesis. Lipid droplets decrease in size during L4 to the female pupal stage and increase once again during the period from newly-emerged to mature adult females. Protein granules are observed for the first time in female pupae, and their appearance might be related to protein storage during metamorphosis. The size of the nucleus of trophocytes also increases during larval development, followed by a decrease during metamorphosis and an additional increase as adult female ages. In conclusion, the morphology of the fat body of T. theobaldi changes according to the developmental stage. Our study provides for the first time important insights into T. theobaldi fat body development and contributes to understand this species biology.

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Section: Introduc Onmentioning

confidence: 99%

Changes in the fat body during the post-embryonic development of the predator Toxorhynchites theobaldi (Dyar & Knab) (Diptera: Culicidae)

Pascini¹,

Albeny²,

Ramalho-Ortigão³

et al. 2011

Neotrop. entomol.

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“…leucocelaenus. Species belonging to this genus exhibit predatory behavior in larval stages (Forattini, 2002;Albeny et al, 2010), and have been evaluated for their potential role as biological control agents (Collins and Blackwell, 2000). However, because we did not record Toxorhynchites larval instars during the collections, we were not able to assess any negative effects on mosquito vector populations.…”

Section: Discussionmentioning

confidence: 99%

Mosquito species occurrence in association with landscape composition in green urban areas

2017

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Aedes aegypti prefers densely populated habitats, but has been shown to explore less anthropogenic environments. We investigated composition of the abundance of mosquitoes in forested areas and assessed relationships between species occurrences and different types of land use and land cover at three spatial scales (100m, 500m and 1000m). Mosquitoes were collected from October 2012 to March 2013 using oviposition traps. We collected 4,179 mosquitoes in total including at least 10 species. Aedes albopictus and Limatus durhami were eudominant species, representing 90% of all collected individuals. We found intraspecific differences in response to land use and land cover, and species response patterns were similar at all spatial scales. Ae. albopictus relative abundance was associated with urbanized areas, while Li. durhami, Haemagogus leucocelaenus and Toxorhynchites sp., abundances were associated with native forest. Aedes aegypti were found in five of the eight areas studied, including in an Atlantic forest fragment at a considerable distance from the forest edge (370 m). Aedes aegypti occurrence was not influenced by type of land use or land cover.Keywords: Aedes aegypti, mosquito, oviposition trap, urbanization, landscape. Ocorrência de espécies de mosquitos associada à composição de paisagem em áreas verdes urbanas ResumoAedes aegypti tem como habitat preferencial áreas densamente povoadas, mas que tem se mostrado capaz de explorar ambientes menos antropizados. O objetivo desse trabalho foi investigar a abundância de mosquitos em áreas florestadas e avaliar a relação dos diferentes tipos de uso e cobertura do solo, em três escalas de paisagem (buffer de 100m, 500m e 1000m). Os mosquitos foram coletados entre outubro de 2012 a março de 2013 utilizando armadilhas de oviposição. Foram coletados 4,179 culicídeos, de pelo menos 10 espécies, destas, Aedes albopictus e Limatus durhami foram eudominantes, representando 90% do total de indivíduos coletados. As espécies de culicídeos respondem de maneira diversa aos tipos de uso e cobertura do solo, indicando que as afinidades mais evidentes se mantém nas três escalas avaliadas. A abundância relativa de Ae. albopictus se mostrou relacionada às áreas mais urbanizadas, enquanto a de Li. durhami, Haemagogus leucocelaenus e Toxorhynchites sp., à presença da mata nativa. Aedes aegypti esteve presente em cinco das oito áreas estudadas, incluindo um fragmento de Mata Atlântica a uma distância considerável da borda (370m). A ocorrência de Aedes aegypti nas áreas analisadas não demonstrou ser influenciada pelo tipo de uso e cobertura do solo.Palavras-chave: Aedes aegypti, mosquito, armadilha oviposição, urbanização, paisagem.

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“…No Brasil, o agente patogênico causador da dengue é transmitido pelo Aedes aegypti (L.) (Funasa, 2002). Esta espécie encontra no meio urbano, condições favoráveis para uma rápida expansão, viabilizadas pela intensa oviposição em recipientes artificiais e naturais (Funasa, 2002;Focks, 2007 (Lounibos & Frank, 1987), dentre elas, as larvas do gênero Toxorhynchites (Albeny et al, 2010). Para a remoção do líquido presente nas plantas foi utilizado um sugador, na forma de um recipiente plástico com 10 cm de comprimento e 5 cm de raio com volume igual a 500 ml com uma tampa com dois orifícios de 2 cm. )…”

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Variação da Predação de Larvas de Aedes aegypti por Larvas de Toxorhynchites violaceus (Diptera: Culicidae) de Acordo com Dimensões do Hábitat

et al. 2012

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Variation of Aedes aegypti Larvae Predation by Toxorhynchites violaceus Larvae (Diptera: Culicidae) According to Habitats Dimensions ABSTRACT -Non-biodegradable containers that accumulate water are commonly found in urban environment, and make ease the larval development of Aedes aegypti mosquito, which can make chemical control very difficult and less effective. Biological control is an alternative method, and the predators larvae of the genre Toxorhynchites (Diptera: Culicidae) are a model widely used. In this article we check the effect of habitat heterogeneity on Ae. aegypti larvae predation by larvae of Toxorhynchites violaceus. The predation model defines that the habitat heterogeneity has a significant effect on predation level. Larvae suffers a higher predation in containers with 1.8 centimeters in high of the water column than in containers with 4 and 13.4 centimeters high. In large containers, the predation of Ae. aegypti larvae by Tx. violaceus larvae may not be efficient. However, in containers that accumulate small water volume, as in the majority of the non-biodegradable containers, the model may be efficient.KEY WORDS -Toxorhynchites, containers, heterogeneity, Ae. aegypti.RESUMO -Recipientes não biodegradáveis que acumulam água espalham-se pelo ambiente urbano e favorece o desenvolvimento larval do mosquito Aedes aegypti, o que aliado a outras questões torna o controle químico larval difícil e/ou pouco efetivo. O controle biológico é um método alternativo e um modelo já utilizado são larvas predadoras do gênero Toxorhynchites (Diptera: Culicidae). O efeito da altura da coluna d'água e área da superfície utilizada para respiração sobre a predação de larvas de Ae. aegypti por larvas de Tx. violaceus foi avaliado. O modelo de predação obtido determina que a variação da altura da coluna d'água e área da superfície de respiração afeta significativamente a predação. Larvas de Ae. aegypti são mais predadas em recipientes com coluna de água de 1,8cm, do que em recipientes com colunas de 13,4 cm e 4,0 cm, a medida que se aumenta a superfície utilizada para respiração. Segundo o modelo obtido, em grandes recipientes, aqueles com grandes medidas para altura de coluna d'água e superfície de respiração, a predação de larvas de Ae. aegypti por larvas de Tx. violaceus pode não ser eficiente. Já em recipientes que acumulam pequeno volume de água como a maioria dos recipientes não biodegradáveis, o modelo sugere que a predação possa ser eficiente.

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Primeiro registro do gênero Toxorhynchites Theobald (Diptera, Culicidae) em Mata Atlântica, Viçosa, Minas Gerais

Abstract: First record of genus Toxorhynchites Theobald (Diptera, Culicidae) in Mata Atlântica,

Cited by 4 publications

References 13 publications

Changes in the fat body during the post-embryonic development of the predator Toxorhynchites theobaldi (Dyar & Knab) (Diptera: Culicidae)

Changes in the fat body during the post-embryonic development of the predator Toxorhynchites theobaldi (Dyar & Knab) (Diptera: Culicidae)

Mosquito species occurrence in association with landscape composition in green urban areas

Variação da Predação de Larvas de Aedes aegypti por Larvas de Toxorhynchites violaceus (Diptera: Culicidae) de Acordo com Dimensões do Hábitat

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