Assessment of mosquito vector diversity across habitats in the ponnani municipal area, kerala, india.

Authors:U. Sajith*, M.C. Rathy, C. C. Harilal.
Int J Biol Med Res. 2015; 6(2): 4879-4882  |  PDF File

Abstract

The spatial and temporal changes in climatic attributes will affect the biology and ecology of vectors and consequently the risk of disease transmission. Therefore periodic analysis of the changes in climatic conditions with respect to the changes in frequency, diversity and distribution of vectors on a regional basis is a prerequisite for ensuring public health and sanitation. In this perspective, the present study has been attempted to assess the diversity, distribution and abundance of mosquito vectors from Ponnani municipal area of Malappuram district with respect to two seasons. The study gains significance as this area is noted to have repeated outbreaks of filariasis in recent years. Sampling of both larvae and adult mosquitoes were carried out from heterogeneous habitats of Ponnani municipal area to determine the species composition, relative abundance and habitat characteristics. Mosquito larvae collected from temporary and permanent breeding sites such as canals, ponds, drains, rice fields etc. were reared to adults in the laboratory for species level identification. Similarly adult mosquitoes, collected from heterogeneous locations during morning and evening times were also subjected to species level identification following standard manuals. Diversity studies on the adult mosquitoes showed higher species diversity during post monsoon season (6 species belonging to 2 genera) than pre monsoon season (4 species belonging to 2 genera). However a reversal in species diversity has been noticed with mosquito larvae, with higher species diversity during Premonsoon season (9 species belonging to 4 genera) than Post monsoon season (7 species belonging to 4 genera). Dissection and subsequent microscopic observation on adult female Culex quinquefaciatus noted the absence of filarial parasites in both the seasons.