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Variability in Populations of Golden Apple Snail, Pomacea canaliculata, (Lamarck, 1822) in selected locations from The Philippines

Author Affiliations

  • 1Department of Biological Sciences, College of Science and Mathematics, MSU-Iligan Institute of Technology, Iligan City, PHILIPPINES
  • 2 Consultant, Ministry of Primary Industries, Department of Agriculture, Koronivia Research Station, P.O. Box 77, Nausori, REPUBLIC OF FIJI and Concurrently Adjunct Professor, Center for Research and Development, Angeles University Foundation, 2009 Angeles City, Pampanga, PHILIPPINES
  • 3 Department of Biology, College of Science, University of the Philippines Baguio, 2600 Baguio City, PHILIPPINES

Res. J. Recent Sci., Volume 2, Issue (8), Pages 12-19, August,2 (2013)

Abstract

The Pomacea canaliculata, also known as Golden Apple Snail (GAS), is considered to be a variable species with shell shape variability despite conflicting environments. Samples of GAS were collected from different locations and ecological environments in the Philippines to describe the extent of variations in shell shapes using conventional measurements and the tools of geometric morphometrics. Using TPS software, the GAS samples collected were landmarked and processed. The output data was then analyzed to determine the differences in the shell among different populations with respect to their sexes. Results showed that among populations, the main variations in the shell shape occurred in the apex of shell aperture and operculum. It also showed that there were no high variations between the shell shape among populations of male and females. The results indicate that shell shape variations among populations can be affected geographically. Ecological factors such as substrates and water flow could have affected also the growth patterns of the shell.

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