We found 4 species of mosquitoes bearing eggs of the human botfly, Dermatobia hominis, in the Reserva Municipal de Trabiju, Pindamonhangaba, São Paulo, Brazil. The mosquitoes were simultaneously collected in landing-biting catches by 2 collectors. From a total of 6,902 specimens collected from January through April 2010, the 15 females carrying D. hominis eggs belonged to Aedes scapularis, Limatus durhamii, Onirion personatum, and Wyeomyia confusa. The first 3 species are new reports of phoresy among mosquitoes and the human botfly.
Foram coletadas espécies de mosquitos antropofílicas em duas áreas de Mata Atlântica onde será implantada uma Unidade de Conservação no município de Itapema-SC. O objetivo desse estudo foi analisar o nível de preservação de duas áreas da Mata Atlântica através da composição da fauna de Culicidae. A diversidade de espécies mostrou-se semelhante nos dois locais de amostragem (Dm=4,02 na Praia Grossa e Dm = 4,04 em São Paulinho). O índice de similaridade entre as duas áreas foi: CCs = 0,57 e CMH = 0,07. O índice de dominância de Simpson foi de 0,63 para a Praia Grossa e 0,31 para São Paulinho. A maior abundância de Anopheles cruzii Dyar & Knabe Culex (Microculex) (táxons relacionados a áreas preservadas) em São Paulinho e de Ochlerotatus scapularis (Rondani) e Psorophora ferox (Humboldt) (táxons relacionados a áreas degradadas) na Praia Grossa sugere que a primeira área é mais preservada do que a segunda.
Mosquitoes (Diptera: Culicidae) of a Future Conservation Unit in the Area of Atlantic Forest in Southern Brazil.
Abstract. Anthropophilic mosquitoes were collected in two areas of the Atlantic Forest wich will constitute a Conservation Unit in the municipality of Itapema-SC. The aim of this study was to analyze the level of preservation of two areas of Atlantic Forest trough the composition of the Culicidae fauna. Species diversity was similar in both sampling sites (Dm = 4.02 in Praia Grossa and Dm = 4.04 in São Paulinho). Indices of similarity between the two areas were: CCs = 0.57 and CMH = 0.07. The Simpson’s dominance index was 0.63 in Praia Grossa and 0.31 in São Paulinho. The higher abundance of Anopheles cruzii Dyar & Knaband Culex (Microculex) (taxa related to preserved area) in São Paulinho and Ochlerotatus scapularis (Rondani) and Psorophora ferox (Humboldt) (taxa related to degraded area) in Praia Grossa suggests that the first area is more preserved than the last.
Marchi, M. J. Standardization of technique for mass production of Culex quinquefasciatus (Diptera: Culicidae) [Master Dissertation]. São Paulo (BR): Faculdade de Saúde Pública da USP; 2014. Objective-To establish a method for mass rearing of Culex (Culex) quinquefasciatus mosquitoes in laboratory, in order to provide subsidy to the population control of this species through the release of sterile males. Methods-A colony of Cx. quinquefasciatus was founded from immature collected in January 2013 in the Pinheiros River, São Paulo/SP, Brazil. Adult mosquitoes had their dry weights measured and the development was evaluated as the time to reach pupae and adult phase. In the first experiment it was tested four different diets (fish food, dog food, a mix of 50% fish and 50% dog food or a mix of 33.33% fish 33.33% dog food and 33.33% milk powder) and three temperatures (27 ± 2°C, 23 ± 2°C and 20 ± 2°C). In the second experiment it was tested several conditions of food amounts (mg/day), larvae densities (ml of water/larva) and water column height that would generate high development rate, low immature mortality and high adult dry weight. Results-In the first experiment there was no statistically significant difference in the time for the development to pupae stage or in the total dry weight of adults among the four experimental diets. However, fish food provided less immature mortality. The highest temperature (27 ± 2°C) decreased the time of the immature life cycle, but generated adults with lower dry weights. In the second experiment, the condition 0.5 mg/larva, 5 ml/larva in 2.1 cm of water column and 27 ± 2°C offered good mass rearing and generated higher development rate, lower immature mortality and higher adult dry weights. Conclusion-No ideal diet was defined for mass rearing in the parameters analyzed. The less expensive diet was the dog food, but this should be milled by hand or machine, which makes the fish food more practical in the production trays. This study suggested that the best condition for mass rearing of Cx. quinquefasciatus mosquitoes was 0.5 mg of daily fish food/larva, 5 ml/larva in 2.1 cm of water column and 27 ± 2°C. The study suggests that this technique can assist in population control of this species.
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