Evolutionary Perspectives for Analyzing Shell Shape Changes in Golden Apple Snail (Pomacea canaliculata) using Landmark-Based Geometric Morphometrics

Geometric morphometric (GM)analysiswas used to carry out variations of the shell shape of Pomacea canaliculata. Freshwater golden apple snails were investigated to find out whether males and females vary in their dorsal and ventral shell orientation considering the fact that they adapt differently to their environment. Relative warps (RW) analysis was done using tpsRelw which […]

Geometric morphometric analysis in determining phenotypic variability of Bugwan,(Hypseleotris agilis, Herre) in Lake Mainit, Philippines

The environment and genetic composition highly attribute to the phenotypes of an organism. This study was carried out to assess the phenotypic variability in the body shapes of Hypseleotris agilis or locally known as Bugwan from Lake Mainit, Philippines using Geometric Morphometric Analysis. Sixty samples consisting of 30 males, and 30 females were randomly collected […]

Intraspecific evaluation in the morphology of Glossogobius guiris using geometric morphometric analysis from lake Mainit, Agusan del Norte, Philippines

Morphological variations among organism have been baseline information to which species may vary from one and another. This study has been conducted to determine the intraspecific evaluation in the morphology of Glossogobius guiris using geometric morphometric analysis from Lake Mainit, Agusan del Norte, Phils. About 60 individuals (30 males and 30 females) were collected and […]

Landmark-based geometric morphometric analysis of forewing sexual dimorphism in mycalesisita

This study presents the phenotypic variation in sexual dimorphism on wing shape of Mycalesisita. Butterfly wings hold highly diverse phenotypes as a result of interactions between adaptive processes, phylogenetic history and developmental constraints. The results of this study revealed that there is no considerable difference in wing morphology within sexes in both sites, though sexual […]

Wing shape variations in Calopteryx splendens along a latitudinal gradient using geometric morphometric analysis

Fluctuating asymmetry (FA) quantifies the degree of variations from a perfect symmetry and therefore expected to reflect the state of genomic and ecological stress undergone by the single species and or populations throughout its development. It identifies the extent of differences from the symmetry of left and right sides of the organisms, as both sides […]

Detection of cyanide in freshwater fishes relative to sex dimorphism using landmark-based geometric morphometrics in Agusan del Sur, Philippines

This study was done for public health and environmental concerns and aimed to determine the presence of cyanide in three fishes such as Channa striata, Oreochromis niloticus and Clarias batrachus, and described the allometry and sex dimorphism of Chevron Snakehead. The physico-chemical parameters, levels of Cyanide, Copper, Lead, Zinc and Iron in nine (9) stream […]

Describing body shape variation of bugwan fish (Hypseleotris agilis) species using land mark-based geometric morphometric in Lake Mainit, Surigao del Norte, Philippines

The study primarily aimed to determine the body shape variation of Hypseleotris agilis using Fluctuating Asymmetry (FA) in relation to their existing population in Lake Mainit, Surigao del Norte, Philippines. The research used Procrustes ANOVA and Principal Component Analysis (PCA) by means of Symmetry and Asymmetry in Geometric Data (SAGE) software to analyze the data. […]

Skull shape variation in the Armored Sailfin catfish, Pterygoplichthys disjunctivus (Siluriformes: Loricariidae), described using geometric morphometrics

The two-dimensional shapes of the skulls of male and female Armored Sailfin Catfish, Pterygoplichthys disjunctivus, were reconstructed in this study using Thin-Plate Spline (TPS) grids. The rationale for doing this is to draw out hypotheses regarding the life history and population dynamics of the Armored Sailfin Fish, which is becoming a nuisance in some freshwater […]

Geometric morphometric and heavy metals analysis of flathead grey mullet (Mugil cephalus), from Agusan River, Butuan city, Philippines

Geometric Morphometric used as a tool in quantifying phenotypic variations among species of the same population. The analysis of heavy metals in the fishes created to determine the extent of harmful elements found since it serves as a human food source. This study aims to determine the fluctuating asymmetry (FA) in the body shapes of […]

Morphological variations of green mussel (Perna viridis) in bula, general santos city using geometric morphometric analysis

The Philippines, being a tropical country in the Pacific, has long been culturing mussels for business and food consumption. However, they cannot determine at a glance what gender is which. This study is conducted to determine the difference of the male P. viridis and the female P. viridis through landmark based Geometric-Morphometric method. The population […]