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Title Sexual dimorphism in the shell shape of the golden apple snail, Pomacea canaliculata (Lamarck) using Geometric Morphometric Analysis
Posted by Carlo Stephen Moneva
Authors Carlo Stephen Moneva, Mark Anthony J. Torres, Cesar G. Demayo
Publication date 2012/4/20
Journal Egyptian Academic Journal of Biological Sciences
Volume 4
Issue 1
Pages 39-46
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.