Ecology, Environment and Conservation Paper

Vol 25, Issue 4 2019; Page No.(1626-1631)

GEOMETRIC MORPHOMETRIC SEXUAL DIMORPHISM IN ANOPHELES BARBIROSTRISS L., AN. EPIROTICUS AND AN. SUBPICTUSS L.

Tanawat Chaiphongpachara

Abstract

Female Anopheles mosquitoes are a vector of the Plasmodium protozoan, which causes malarial disease. The sexual dimorphism of Anopheles vectors can be determined by examining external morphological factors, such as antennae. However, mosquito specimens trapped in the field are often damaged, leading to sexual dimorphism errors. This study conducted an evaluation of the effectiveness of sexual dimorphism in An. barbirostriss L., An. epiroticus, and An. subpictuss L. in Thailand using a landmark-based geometric morphometric (GM) approach. The research revealed the high efficiency of this GM approach in the separation of sexes in three species of Anopheles mosquitoes. In both sexes, An. barbirostriss L. had the largest wing centroid size (CS), followed by An.epiroticus and An. subpictuss L., respectively. The wing CS and shape were significantly different between females and males in each Anopheles species (p <0.05). Therefore, this technique offers a highly applicable approach for determining sexual dimorphism of Anopheles mosquitoes.

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