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VERTICAL DISTRIBUTION OF OVIPOSITION AND TEMPORAL SEGREGATION OF ARBOVIRUS VECTOR MOSQUITOES (DIPTERA: CULICIDAE) IN A FRAGMENT OF THE ATLANTIC FOREST, STATE OF RIO DE JANEIRO, BRAZIL
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Affilliation
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Diptera. Rio de Janeiro, RJ, Brasil / Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Programa de Pós-graduação em Medicina Tropical. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Diptera. Rio de Janeiro, RJ, Brasil.
Instituto Nacional da Mata Atlântica—INMA. Santa Teresa. Espírito Santo, Brasil.
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires C1063 CABA, Argentina / Centro Nacional de Diagnóstico e Investigación en Endemo-Epidemias (CeNDIE), Administración Nacional de Laboratorios e Institutos de Salud “Dr. Carlos Malbrán” (ANLIS), Av. Paseo Colón 568, Buenos Aires C1063 CABA, Argentina.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Diptera. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Diptera. Rio de Janeiro, RJ, Brasil.
Instituto Nacional da Mata Atlântica—INMA. Santa Teresa. Espírito Santo, Brasil.
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires C1063 CABA, Argentina / Centro Nacional de Diagnóstico e Investigación en Endemo-Epidemias (CeNDIE), Administración Nacional de Laboratorios e Institutos de Salud “Dr. Carlos Malbrán” (ANLIS), Av. Paseo Colón 568, Buenos Aires C1063 CABA, Argentina.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Diptera. Rio de Janeiro, RJ, Brasil.
Abstract
Culicid species, which include potential vectors of yellow fever, are diverse and abundant,
with species commonly co-occurring in certain sites. Studying these species can provide important
insights into their vector potential and, consequently, epizootic cycles of arboviruses carried about by
these vectors. Here, we evaluated the vertical distribution and temporal segregation of mosquito
oviposition with emphasis on arbovirus vectors in a fragment of the Atlantic Forest in Casimiro de
Abreu, Rio de Janeiro, Brazil. Two sampling points were selected: Fazenda Três Montes and the
Reserva Natural de Propriedade Privada Morro Grande. Collections were carried out at two sites
using 10 ovitraps installed on the vegetation cover at different heights (0, 2, 4, 6, and 8 m above
ground level) and monitored monthly from July 2018 to December 2020. The hypotheses of temporal
and vertical stratification were tested through a PERMANOVA, and the relationship of each species
with the vertical distribution was evaluated individually through a correlation analysis. We collected
a total of 3075 eggs, including four species of medical importance: Haemagogus leucocelaenus (n = 1513),
Haemagogus janthinomys (n = 16), Aedes albopictus (n = 1097), and Aedes terrens (n = 449). We found that
Hg. leucocelaenus had a positive relationship with height, exhibiting behavior that appears to benefit
from higher heights. The abundance of Ae. terrens seemed to follow Hg. leucocelaenus, although
we did not find a relationship with height for the former species. On the other hand, Ae. albopictus
exhibited a negative relationship with height, becoming absent or outnumbered at higher strata.
Our study site has already presented evidence of recent transmission of the wild yellow fever virus,
supporting the need to carefully monitor the emergence of febrile diseases among residents in the
surrounding areas and the local population.
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