期刊名称：Advances in Environmental Sciences - International Journal of the Bioflux Society
印刷版ISSN：2066-7620
电子版ISSN：2065-7647
出版年度：2015
卷号：7
期号：3
页码：432-441
出版社：Bioflux
摘要：Evolutionary biology uses most preferably molluscan model such as Pomacea canali culata (Lamarck) to demonstrate evolutionary adaptations to different ecolo gical conditions. Peculiar adaptations of P . can ali culata , a dioecious golden apple snail have recently been recognized as important, albeit neglected, models for evolutionary ecology studies. Several studies have shown different interpretations about shel l shape variation and sexual dimorphism on P . canaliculata however, this study sought to evaluate and determi ne the existence of phenotypic variation in the shells of g olden apple snails using geometric morphometric techniques on geographically isolated ri ce field's populations from three different geographical zones in Mindanao , Philippines . Three views of the shell shape were studied, which includes the ventral/aperture, dorsal and the top/whorl portion of the shell . Results show extremely significant phen otypic variations on the different shell part views (aperture, dorsal and whorl) in both male and female P. canali culata collected from three different ricefields. Since phenotypic traits are assumed to correlate with similarity in habitat use, t his phenot ypic variation could possibly be a case of agroecotype, a phenomenon which needs to be further explored in this most proliferative rice pest P. canali culata since this term is applied to a crop or organism being adapted to its environment . This population studies could provide significant biological information for further management strategies against this invasive pest
关键词：sexual dimorphism; geometric morphometrics; population studies; invasive ; species
