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2014 (Vol. 3, Issue: 2)
Article Information:

Comparing Compartmentalization in the Shell of Two Populations of Golden Apple Snails, Pomacea canaliculata Lamarck (Gastropoda: Ampullariidae)

Jhun Joules M. Mahilum and Cesar G. Demayo
Corresponding Author:  Jhun Joules M. Mahilum 

Key words:  Integration, lake dapao, lake lanao, modularity, modules, ,
Vol. 3 , (2): 26-31
Submitted Accepted Published
February 22, 2014 March 29, 2014 May 20, 2014

This study was conducted to describe compartmentalization in the shell of P. canaliculata using geometric morphometric approach. Modularity and Integration Tool (MINT) was used in the analysis of geometric morphometric data. A total of 150 points were used to outline the margins around the contour of the shell. Several models were hypothesized to determine the best fitted model. Result show the shell is divided into contours based on its shells boundaries. These compartments also referred to as modules are (1) the spire, (2) body whorl and (3) the whole space occupying the whole apertural area. There was consistency in the best-fit model generated in both sexes and populations indicating the same morphological pattern followed. The resulting fair consistency of the observed patterns of hypothesized developmental modules implies that shell of P. canaliculata is highly conserved and that these three parts of the organismís shell are coordinated in their sizes and shapes to make up a functional whole. It can be argued from this study that the spire, body and aperture parts of the GAS shell are integrated with each other because they develop, function and evolve jointly.
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  Cite this Reference:
Jhun Joules M. Mahilum and Cesar G. Demayo, 2014. Comparing Compartmentalization in the Shell of Two Populations of Golden Apple Snails, Pomacea canaliculata Lamarck (Gastropoda: Ampullariidae).  International Journal of Fisheries and Aquatic Sciences, 3(2): 26-31.
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ISSN (Online):  2049-842X
ISSN (Print):   2049-8411
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