The assessment that an introduced species coming up out of the non-marine mollusks influence islands ecosystem by gene pollution

在鹿儿岛北部的琉球群岛（大隅岛、托卡拉岛、奄美岛）和鹿儿岛大陆，我研究了外来和特有的非海洋软体动物物种。(1)调查了某岛特有地螺的分布情况及栖息现状。特别调查了一个引进物种的影响情况。本研究选取了原鳃亚纲地螺、肉水螺、半咸水螺、肺门螺蛳科、某淡水产品双壳门特有种。对某特有种的生境现状调查和某引进种的影响情况进行了研究。(2)阐明了部分引进种地螺对特有种的影响，并对其生态系统的影响进行了评价。在北琉球群岛，从国内引进许多外来物种的事情比从外国引进的物种更容易被阐明。(3)采用RAPD方法分析了4种特有种和1种引种的DNA。其中一部分成果为专利申请。专利名称为“一种利用体液/黏液提取软体动物的活生殖细胞的核酸和分解方法”。(4)在一些特有种中，阐明了外来引进种在本国的生命周期。在日本的一种特有物种中，几种淡水蜗牛威胁着外来物种或当地特有的生态系统。因此，在日本原产地的一个栖息地，阐明了这些蜗牛物种的基本习性。

In the Ryukyu chain of islands northern part of Kagoshima (Osumi-shoto Islands, Tokara islands, Amami-shoto Islands) and the Kagoshima mainland, I studied introduced and endemic species of non-marine mollusks.(1)I investigated the distribution situation of a peculiar land snail of an island and the habitation present situation. In particular it was investigated the influence situation of an introduced species. In this study, a land snail of Subclass Prosobranchia, flesh water snail, brakishwataer snail, Bradibaenidae of Pulmonata, an endemic species of Bivalvia of a fresh water product were selected. Habitation present situation investigation of an endemic species and the influence situation of an introduced species were studied.(2)The influence that land snail of some introduced species gave endemic species was elucidated, and it was evaluated the influences of ecosystem. In north Ryukyu islands, a thing with many introduced specieses introduced from the country was elucidated than an introduced species introduced from a foreign territory.(3)Four kinds of endemic specieses, DNA of one kind of introduced species were analyzed by RAPD method. One part of result did patent application. The patent name is "a nucleic acid and a resolution method of a live germ cell to use bodily fluids / viscous liquid extraction thing of a mollusk".(4)In some endemic species, the life cycle in the country of the kind that became an introduced species in a foreign territory was elucidated. In a Japanese endemic species, several kinds brakishuwater snail threatens an introduced species or local peculiar ecosystem in a foreign territory. On this account, in a habitat of the Japanese place of origin, the basics habits of these snail species were elucidated.