2012 Fiscal Year Final Research Report

Original country, breeding strategy and effect to ecosystem of Japanese population of an invasive land snail Rumina decollata

Research Project

Project/Area Number	22510032
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Environmental impact assessment/Environmental policy
Research Institution	Kyushu University
Principal Investigator	MATSUKUMA Akihiko 九州大学, 総合研究博物館, 専門研究員 (90108647)
Co-Investigator(Kenkyū-buntansha)	MISHIMA Misako 九州大学, 総合研究博物館, 准教授 (30346770)
Project Period (FY)	2010 – 2012
Keywords	生態系影響評価 / 外来種 / 自家受精
Research Abstract	Japanese populations of Rumina decollata are represented by only one haplotype, which is also known from Portugal, Spain and China. It may be anthropochorously introduced one time and unintentionally dispersed to other places in Japan. Self-fertilization is more favorable to alien species and it may bring great prosperity or rapid extinction. A limited distribution of the snail in Ainoshima Islet suggests that it was introduced recently, so continuous observation is necessary to evaluate an effect of the invasion of the snail against native molluscan ecosystem.