High Predation Pressure by an Introduced Flatworm on Land Snails on the Oceanic Ogasawara Islands 1
High Predation Pressure by an Introduced Flatworm on Land Snails on the Oceanic Ogasawara Islands 1
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引进的扁形虫对海洋小笠原群岛陆地蜗牛的高捕食压力 1
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
Hisashi Tamada
中科院分区：
文献类型：
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作者：
Shinji Sugiura;I. Ôkochi;Hisashi Tamada
一种掠食性扁形虫的引入，被认为是热带海洋岛屿上特有的陆地蜗牛数量减少的原因之一。为了阐明马诺瓦氏螺蛳对田间蜗牛存活率的影响，我们在小笠原（小笠原）群岛的Chichijima研究了放置在没有蜗牛（即有马诺瓦氏螺蛳）的地区的蜗牛存活率。结果表明，钉螺的死亡率分别在3 d和11 d后超过50%和90%，死亡的主要原因是马诺瓦氏单胞虫的捕食。
The introduction of a predatory flatworm, Platydemus manokwari, has been considered a cause of the decline of endemic land snails on the tropical oceanic islands. To clarify the effect of P. manokwari on land snail survival in the field, we examined survival rates of snails experimentally placed in areas where snails are absent (i.e., P. manokwari is present) on Chichijima, Ogasawara (Bonin) Islands. We found that over 50 and 90 percent of the snails were dead after 3 and 11 d, respectively, and that the main cause of mortality was predation by P. manokwari.