Effects of flooding of the River Paraná on the temporal activity of Anopheles (Nyssorhynchus) darlingi Root (Diptera: Culicidae), at the border state of Mato Grosso do Sul and São Paulo, Brazil

Revista da Sociedade Brasileira de Medicina Tropical

Almério De Castro Gomes¹  Marcia Bicudo De Paula¹  Delsio Natal¹  Sabina Léa Davidson Gotlieb¹  Luis Filipe Mucci¹ 

[1] ,University of São Paulo School of Public Health Department of EpidemiologySão Paulo SP ,Brazil

关键词: Hydroelectric power station;    Anopheles;    Diversity index;    Nycthemeral rhythm;    Hidrelétrica;    Anopheles;    Índice de diversidade;    Ritmo nictimeral;   

DOI  :  10.1590/S0037-86822010000500009

来源: SciELO

【 摘 要 】

INTRODUCTION: Study of the temporal activity of malaria vectors during the implantation of a hydroelectric power station on the River Paraná, intended to generate electrical energy. The river separates the States of São Paulo and Mato Grosso do Sul, in Brazil. The objective was to verify whether alterations occurred in the wealth and diversity indices of Anopheles, following two successive floods, extended to the temporal activity and nycthemeral rhythm followed over a five year period. METHODS: Mosquito capture was performed monthly using the Human Attraction Technique and Shannon Traps. The first, executed for 24h, provided the nycthemeral rhythm and the second, lasting 15h, permitted the tracking of Anopheles during the two floods. RESULTS: The bimodal pattern of Anopheles darlingi defined before these floods was modified throughout the environment interventions. The same effect had repercussions on the populations of An albitarsis s.l., An triannulatus and An galvaoi. Activity prior to twilight was less affected by the environment alterations. CONCLUSIONS: The dam construction provoked changes in Anopheles temporal activity patterns, permitting classification of the area as an ecologically steady and unstable situation. Differences observed in Anopheles behavior due to the capture methods revealed the influence of solo and multiple attractiveness inside the populations studied.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License