Sexual Dimorphism in the Shell Shape of the Golden Apple Snail, Pomacea canaliculata (Lamarck) Using Geometric Morphometric Analysis | ||||
| Egyptian Academic Journal of Biological Sciences, B. Zoology | ||||
| Article 5, Volume 4, Issue 1, December 2012, Page 39-46 PDF (457.31 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/eajbsz.2012.13537 | ||||
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| Authors | ||||
| Carlo Stephen Moneva; Mark Anthony J. Torres; Cesar G. Demayo | ||||
| Department of Biological Sciences, College of Science and mathematics, MSU-Iligan Institute of Technology, Iligan City, Philippines | ||||
| Abstract | ||||
| It has been accounted that the extent of sexual dimorphism in Pomacea canaliculata, a serious rice pest in Asia, has caused considerable taxonomic confusion. This study was conducted to explore possible sexual shell dimorphism in P. canaliculata by the aid of geometric morphometric measurements, since traditional measurements have problems in terms of accuracy. Relative Warp Analysis and Discriminant Function Analysis have been used in the study to determine patterns of sexual shell dimorphism in the golden apple snail. Results demonstrated sexual differences in size, spire height, and shell opening. These morphological differences could be attributed to ecological responses of the gastropod. The results clearly indicate that geometric morphometric methods are useful in detecting subtle differences between sexes. | ||||
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