Relative Warp Analysis on Shell Shapes of Faunus ater in Guihing River Hagonoy, Davao del Sur

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Research Paper 01/03/2016
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Relative Warp Analysis on Shell Shapes of Faunus ater in Guihing River Hagonoy, Davao del Sur

Darlene Deanne C. Mallari, Bianca T. Rabang, Renante V. Mesias, Von Jezzrel A. Jumao-as, Mark Anthony J. Torres, Elani A. Requieron
J. Biodiv. & Environ. Sci. 8(3), 55-63, March 2016.
Copyright Statement: Copyright 2016; The Author(s).
License: CC BY-NC 4.0

Abstract

This study aims to characterize the relative warp analysis on shell shapes of the Faunus ater. A total of 60 individuals were analyzed based on their shell shape and was deliberated using a landmark-based methodology. The following are the total landmarks stated and used: ventral/aperture=27, dorsal=17 and top of the whorl=147. Procrustes ANOVA showed the significant level of symmetry of F. ater on its ventral/aperture=0.0392123; dorsal=0.1069 and top of the whorl=1.20366 portion. To further sustain the analysis, the upper five percent (5%) value of PCA was performed to visualized shape variation landmarked subject together with the histogram, and also used to investigate patterns of variation in the positions of landmarks: ventral/aperture=100.00%; dorsal=16.67% and top of the whorl=96.702%. The designated relative warps by its overall shape variation and percentage variance of F. ater confirms (a)16.66671667%; (b)16.6666%; (c)20.0001% for (a)ventral/aperture, (b)dorsal and (c)top of the whorl courtesy of relative warp box plot and histograms. The results of this study suggest that Relative Warp Analysis (RWA), Principal Component Analysis (PCA) of F. ater species mostly differ in the latter part and their body depth. The study of morphological differences in sizes and pattern using the ventral/aperture, dorsal, and top of the whorl characteristics of the shell clearly indicates its shell shape variation. In this manner, F. ater was quantitatively defined.

Gomez M, Strong E, Glaubrecht M. 2014. A West Indian Enigmatic Native: Redescription and Anatomy of the Ovoviviparous Freshwater Gastropod Hemisinus lineotatus Wood, 1828 (Cerithioidea, Thiaridae) Endemic to Jamaica. Zoological Journal of the Linnean Society.

Kohler F, Rintelen TV, Meyer A, Glaubrecht M. 2004. Multiple Origin of Viviparity in Southeast Asian Gastropods (Cerithiodea: Pachychilidae) and its Evolutionary Implications. Institute of Systematic Zoology, 2215-2226.

Lok A, Ang WF, Ng PX, BN, KTS. 2011. Status and Distribution of Faunus ater (Linnaeus, 1758) (Mollusca: Cerithioidea) in Sinagpore. Nature in Singapore, 115-121.

Manzo K, Estandarte MH, Dalipe R, Ulangutan J. 2014. Survey and Diversity of Intertidal Mollusks in Alabel and Maasim. ACCL Journal of the Bioflux Society, 449-457.

Moneva CS, Torres MA, Demayo C. 2012. Relative Warp and Correlation Analysis based on Distances of the Morphological Shell Shape Patterns among Freshwater Gastropods (Thiaridae: Cerithimorpha). ACCL Journal of the Bioflux Society, 507-516.

Sobrepena JM, Demayo C. 2014. Outline-based Geometric Morphometric Analysis of Shell Shapes in Geographically Isolated Populations of Achatina fulica from the Philippines. Journal of Entomology and Zoology Studies, 237-243.

Tan SK, Low MY. 2013. Singapore Mollusca: The Family Angariidae (Gastropoda: Vetigastropoda: Angarioidea). Nature of Singapore, 239-246.

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