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Apresentamos os resultados de observação sobre o ciclo circadiano de atividade hematofágica dos mosquitos, em Granja Calábria, Jacarepaguá, na planície litorânea do Rio de Janeiro, onde realizamos, em isca humana, ao ar livre, capturas semanais, de 8 às 10, de 13 às 15 e 18 às 20 horas, de agosto de 1981 a julho de 1982, além de três capturas horárias de 24 horas seguidas. A maioria das espécies locais revelou caráter crepuscular vespertino e noturno. Contudo Limatus durhami, Phoniomyia davisi, Wyeomyia leucostigma e Wyeomyia (Dendromyia) sp. foram essencialmente diurnas, enquanto Anopheles albitarsis, Culex chidesteri e Culex quinquefasciatus foram obtidas somente no crepúsculo vespertino e à noite. Embora Anopheles aquasalis, Culex coronator, Culex saltanensis, Culex crybda e Coquillettidia venezuelensis fossem preponderantemente noturnas e Phoniomyia deanei e Phoniomyia theobaldi principalmente diurnas, obtivemô-las algumas vezes, fora do horário preferencial, sendo que Phoniomyia deanei teve nítido incremento pré-crepuscular vespertino. Aedes scapularis, Aedes taeniorhynchus e Mansonia titillans, espécies mais ecléticas, picaram durante todo o nictêmero, mas com flagrante acentuação crepuscular vespertina. This paper presents the results of obsrvation on the circadian biting cycle of mosquitoes, at Granjas Calábria, Jacarepaguá, in the coastal lowland of Rio de Janeiro, Brazil, where we carried out weekly outdoor captures on human bait, from 8 to 10 a.m. and from 1 to 3 and 6 to 8 p.m., from August 1981 to July 1982, as well as three nyctemeral captures also on human bait. Most of the local species were more frequent at sunset and at night. Li. durhami, Ph. davisi, Wy. leucostigma and Wyeomyia (Den.) sp. were clearly diurnal, while An. albitarsis, Cx. chidesteri and Cx. quinquefasciatus were obtained only at sunset and at night. Although An. aquasalis, Cx. coronator, Cx. saltanensis, Cx. crybda and Cq. venezuelensis appeared to be night feeders and Ph. deanei and Ph. theobaldi diurnal, we have caught them soemtimes out of their preferential feeding periods; Ph. deanei presented a pre-crepuscular increase in its biting activity. Ae. scapularis, Ae. taeniorhynchus and Ma. titillans, were more ecletic, attacking in large numbers at sunset, keeping very active through the night, but biting during the remainder of the 24-hour period

memórias do instituto oswaldo cruz

Alguns aspectos da ecologia dos mosquitos (Diptera: Culicidae) de uma área de planície (Granjas Calábria), em Jacarepaguá, Rio de Janeiro: III. Preferência horária das fêmeas para o hematofagismo