Fig. 1: Scatter diagram based on PCA of significant meristic variables among populations of O. carnaticus (Perungalathur- Blue squares; Pulicat- Violet Circles; Sriperumbudur- Blue Stars; Component 1- 32.47%; Component 2- 21.82%).

Fig. 2: Scatter diagram based on PCA of significant morphometric variables among populations of O. carnaticus (Perungalathur- Blue squares; Pulicat- Violet Circles; Sriperumbudur- Blue Stars; Component 1- 30.04%; Component 2- 19.32%).