Abstract

• The present research focused to examine landmark-based morphometric variations of Notopterus notopterus, Macrognathus zebrinus, Anabas testudineus and Trichogaster pectoralis from Thaung Pyin “In”, Thegon Township, Bago Region. A total four of 20 specimens of each species were collected from the study area. The 10 morphological landmarks were selected along the outline of the specimens. The number of landmarks based on the respective species and the truss network were also changed on morphology. In the present study 8 to 10 points in landmark and 16 to 21 trust networks were recorded. Multivariate analysis of variance (ANOVA) was carried out to test the significance of morphological differences among the study species. The principal component analysis (PCA) indicated shape variation and explained the total variance (66.03%, 79.44%, 64.78% and 69.66 %) of N. notopterus, M. zebrinus, A. testudineus and T. pectoralis respectively. Discriminant function analysis (DFA) was accounted for three morphological indices in M. zebrinus , four morphological indices in N. notopterus and A. testudineus, and six morphological indices in T. pectoralis of the within group variability. Individuals into their original group were correctly classified and the result showed 100% in N. notopterus, M. zebrinus and T. pectoralis and 95% in A. testudineus. All statistically analyses were carried out using SPSS Software Package Version 25.