Application of geometric morphometrics for body shape analysis in Selaroides leptolepis population from Butuan Bay, Philippines (original) (raw)

2019, International Journal of Fisheries and Aquatic Studies

Genomic and environmental adaptation possibly develops to phenotypic plasticity. As expected, this results to the structural variation that affects symmetrical outlines of species. Systematized techniques such as geometric morphometrics were applied to detect the phenomenon while considering landmark points to identify the fluctuating asymmetry (FA). FA illustrates deviations from the original state of symmetry. It quantifies variations between the left and right side of bilateral structure hence the two sides are genetically alike. In this study morphological differences of Selaroides leptolepis were investigated. About 60 individuals consisting of 30 males and 30 females were collected and analyzed for fluctuating asymmetry. FA from both samples subjected to Procrustes ANOVA, Principal Component Analysis (PCA), Implied Deformation and Histogram to evaluate the asymmetrical differences using Symmetry and Asymmetry in Geometric Data (SAGE) software. The result shows highly significa...