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Ecology and larval population dynamics of the primary malaria vector Nyssorhynchus darlingi in a high transmission setting dominated by fish farming in western Amazonian Brazil

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dc.contributor.author Rufalco-Moutinho, Paulo
dc.contributor.author Moura Kadri, Samir
dc.contributor.author Peres Alonso, Diego
dc.contributor.author Moreno, Marta
dc.contributor.author Carrasco Escobar, Gabriel
dc.contributor.author Prussing, Catharine
dc.contributor.author Gamboa Vilela, Dionicia Baziliza
dc.contributor.author Vinetz, Joseph Michael
dc.contributor.author Mureb Sallum, Maria Anice
dc.contributor.author Conn, Jan E.
dc.contributor.author Martins Ribolla, Paulo Eduardo
dc.date.accessioned 2021-05-18T21:44:15Z
dc.date.available 2021-05-18T21:44:15Z
dc.date.issued 2021
dc.identifier.uri https://hdl.handle.net/20.500.12866/9364
dc.description.abstract Vale do Rio Jurua in western Acre, Brazil, is a persistent malaria transmission hotspot partly due to fish farming development that was encouraged to improve local standards of living. Fish ponds can be productive breeding sites for Amazonian malaria vector species, including Nyssorhynchus darlingi, which, combined with high human density and mobility, add to the local malaria burden.This study reports entomological profile of immature and adult Ny. darlingi at three sites in Mancio Lima, Acre, during the rainy and dry season (February to September, 2017). From 63 fishponds, 10,859 larvae were collected, including 5,512 first-instar Anophelinae larvae and 4,927 second, third and fourth-instars, of which 8.5% (n = 420) were Ny. darlingi. This species was most abundant in not-abandoned fishponds and in the presence of emerging aquatic vegetation. Seasonal analysis of immatures in urban landscapes found no significant difference in the numbers of Ny. darlingi, corresponding to equivalent population density during the rainy to dry transition period. However, in the rural landscape, significantly higher numbers of Ny. darlingi larvae were collected in August (IRR = 5.80, p = 0.037) and September (IRR = 6.62, p = 0.023) (dry season), compared to February (rainy season), suggesting important role of fishponds for vector population maintenance during the seasonal transition in this landscape type. Adult sampling detected mainly Ny. darlingi (~93%), with similar outdoor feeding behavior, but different abundance according to landscape profile: urban site 1 showed higher peaks of human biting rate in May (46 bites/person/hour), than February (4) and September (15), while rural site 3 shows similar HBR during the same sampling period (22, 24 and 21, respectively). This study contributes to a better understanding of the larvae biology of the main malaria vector in the Vale do Rio Jurua region and, ultimately will support vector control efforts en_US
dc.language.iso eng
dc.publisher Public Library of Science
dc.relation.ispartofseries PLoS ONE
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject Larvae en_US
dc.subject Malaria en_US
dc.subject Fish farming en_US
dc.subject Fish en_US
dc.subject Plasmodium en_US
dc.subject Mosquitoes en_US
dc.subject Multivariate analysis en_US
dc.subject Amphibians en_US
dc.title Ecology and larval population dynamics of the primary malaria vector Nyssorhynchus darlingi in a high transmission setting dominated by fish farming in western Amazonian Brazil en_US
dc.type info:eu-repo/semantics/article
dc.identifier.doi https://doi.org/10.1371/journal.pone.0246215
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#3.03.06
dc.relation.issn 1932-6203


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