Abstract

Mosquito population and some of the ecological aspects of the environment were studied in an observation conducted in seven villages around the Grata dam project area from April 1956 through March 1987. One of the aims of this study was to evaluate the impact of the dam project toward the mosquito population, as a part of environmental impact analysis, and also to observe development of other impacts that could be anticipated from the dam construction. Both human bait and light trap methods were used for mosquito collections. Statistical method of Index of Diversity of Shanon - Wiener, Summed Dominance Ratio, and chi-square test were utilized for data analysis. Eighteen mosquito species were found and twelve of them are known as vectors for some viral diseases: Culex vishnui, Cx. tritaeniorhynchus, and Cx. quinquefasciatus.