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Title: Diversity and spatio-Temporal variation of Anopheles (Diptera: Culicidae) before and after the construction of the Jirau hydroelectric plant, state of Rondônia, Brazil
Authors: Ferreira, Francisco Augusto da Silva
Costa, Fábio Medeiros da
Lima, Gervilane Ribeiro de
Roque, Rosemary Aparecida
Costa Ferreira, Vania da
Santos Neto, Veríssimo Alves Dos
Benchimol, Thais Melo
Scarpassa, Vera Margarete
Tadei, Wanderli Pedro
Issue Date: 2021
metadata.dc.publisher.journal: Revista Brasileira de Entomologia
metadata.dc.relation.ispartof: Volume 65, Número, 2
Abstract: The objective of this study was to evaluate the effect of the construction of the Jirau hydroelectric plant on the anopheline species, in Porto Velho, Rondônia, Brazil. For this, sampling was carried out in 23 locations in the pre (2004) and 23 after construction (2018) phases in the hydroelectric dam's coverage area, performed by human landing catch between 6:00 pm and 10:00 pm. We found 14 anopheline species. In the pre-construction phase, An. darlingi (73%) was the most abundant and after construction An. braziliensis (31.5%) was the most abundant. The T test indicated that there were no differences in the indexes-diversity (H '), richness (Sjack 1), equitability (J') and dominance (d) of anophelines species-evaluated between the phases (p 0.05). The spatio-Temporal distribution of An. darlingi proved to be wide, with the highest density values observed in March (x w = 27.1) in the pre-construction phase and in the months of May (x w = 4) and July (xw = 3.1), post-construction. Differences in hematophagic activity peaks were observed between species and between phases. According to the data obtained in this study, the construction of the hydroelectric plant had little influence on the composition of anopheline species, however changes were observed in the spatio-Temporal distribution of the An. darlingi and in the pattern of hematophagic activity of the species, which directly influenced the dynamics of malaria in the region. © 2021 Sociedade Brasileira De Entomologia. All rights reserved.
metadata.dc.identifier.doi: 10.1590/1806-9665-RBENT-2020-0105
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