The influence of the area of the Serra da Mesa Hydroelectric Plant, State of Goiás, on the frequency and diversity of anophelines (Diptera: Culicidae): a study on the effect of a reservoir

Abstract

Introduction: Bioecological aspects of anophelines (Diptera: Culicidae) near areas under the direct infl uence of the hydroelectric plant reservoir of Serra da Mesa in Goiás, Brazil, were analyzed. Methods: Samples were collected at the surrounding dam area during the phases before and after reservoir impoundment. The infl uence of climatic and environmental factors on the occurrence of Anopheles darlingi, Anopheles albitarsis, Anopheles triannulatus, Anopheles oswaldoi and Anopheles evansae was assessed using Pearson's correlations with indicators for richness and diversity as well as the index of species abundance (ISA) and the standardized index of species abundance (SISA). Results: The highest anopheline density occurred during the phase after fi lling the tank; however, no direct correlation with the climatic factors was observed during this stage. The reservoir formation determined the incidence of the anopheline species. An. darlingi was the predominant species (SISA = 1.00). Conclusions: The signifi cant difference (p < 0.05) observed between the species incidence during the different reservoir phases demonstrates the environmental effect of the reservoir on anophelines.

Ecological characterization of mosquitoes (Diptera: Culicidae) in areas of the Mato Grosso Pantanal, Mato Grosso State, Brazil

“…This homogeneity pattern in the distribution of the species was also found for the genera Psorophora, Uranotaenia, and Ochlerotatus, in which the abundance of one species is generally accompanied by low densities of the other species. Melandri et al (2015) observed a 37-fold increase in the total occurrence of anopheline species influenced by large floods during the formation of the Serra da Mesa Hydroelectric Power Plant's artificial reservoir compared to the period before flooding. These results are consistent with those found in this study for the Matogrosso Pantanal, in that the anopheline species analyzed occurred mainly during the rainy season, particularly An.…”

Cases and distribution of visceral leishmaniasis in western São Paulo: A neglected disease in this region of Brazil

“…In the western region, the proliferation of vectors could be aggravated by the extensive watershed flowing into the Paraná and Paranapanema Rivers, supporting hydroelectric dams, bridges and artificial lakes [22][23][24][25][26]. Porto Primavera dam in Paraná River has an artificial lake with a flooded area of 2.250 km 2 and divides the municipalities of RNHA11mesoregion and MS.…”

“…Dividing São Paulo and Paraná state, the Paranapanema River flows on the border of ten municipalities with increasing rates of VL to the VL-free areas of Paraná state. Artificial lakes modify the climate of their surrounding areas as well as the environment within which the lake interacts [22][23][24][25][26]. In Presidente Epitacio, a city bordering the lake of Primavera dam, higher yearly temperatures rates of 23.93±3.06˚C (95% CI 22.54-25.32) were found compared with 22˚C in municipalities far from the lakes [23].…”