Describing chonchological variation in shape of shell of selected golden apple snail populations from the Philippines and Japan

Issue Date

10-2012

Abstract

The Golden Apple Snail (GAS), Pomacea canaliculata Lamarck is considered as one of the serious rice pests in Asia. It is being argued that the rapid invasion of this species in many variable habitats suggests genetic variability and differentiation which could be expressed both as phenotype and genotype. It is therefore the major objective of the study to explore possible phenotypic differentiation in the organisms especially in the shape of the shell using geometric morphometric analysis. Specifically, this study aimed to determine chonchological variation in populations of GAS in the Philippines and Japan. Three aspects of the shell shape were studied, namely, the ventral/aperture, dorsal and the top/whorl portion of the shell using correlation analysis based on distances (CORIANDIS). CORIANDIS was used to visualize congruence of multivariate traits among P. canaliculata populations. The results showed that P. canaliculata shells vary in shape, and geographic distance is a factor that contributes in shaping the structure of the populations. This variability may signify distinctive genotypes and that this geographic variation may have an important effect on expanding the golden apple snail population.

Source or Periodical Title

Philippine Entomologist

ISSN

0048-3753

Volume

26

Issue

2

Page

186

Document Type

Article

Frequency

biannually

Language

English

En – AGROVOC descriptors

POMACEA CANALICULATA; POMECEA; PLANT PESTS; PEST INSECTS; PHENOTYPIC VARIATION; GEOGRAPHICAL DISTRIBUTION; PHILIPPINES; JAPAN

This document is currently not available here.

Share

COinS