Geotaxis and Phototaxis in Elphidium Crispum (Protozoa: Foraminiferida)
Geotaxis and Phototaxis in Elphidium Crispum (Protozoa: Foraminiferida)
复制标题
Elphidium Crispum 的趋地性和趋光性（原生动物：有孔虫）
DOI：
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发表时间：
1997
影响因子：
1.2
通讯作者：
Steve Shaw
中科院分区：
文献类型：
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作者：
C. Manley;Steve Shaw
通过研究地地趋向性、趋光性、时间影响和个体发育反应，对 Elphidium Critum 进行了实验室实验，以确定该物种保持表层动物的机制。分别在四个月和五个月内测试了不同尺寸类别的标本的趋光性和地趋性。测试的最小尺寸级别的样本（250–355 μm）具有显着的趋光性和趋地性。除一项测试外，所有测试均显示出显着的正向趋光性，尺寸等级为 500-1000 μm 的样本在 1994 年 6 月和 7 月的结果尤其显着。在 13 项测试中，有 3 次样本具有显着的趋光性：负向趋光性和正向趋光性均得到证实。
Laboratory experiments were carried out upon Elphidium crispum to determine the mechanism by which this species remains epifaunal, by investigating geotaxism, phototaxism, temporal influence and responses through ontogeny. Different size-classes of specimens were tested for phototaxism and geotaxism, over four and five months respectively. Specimens of the smallest size-class tested (250–355 μm) were significantly phototaxic and geotaxic. Significant positive phototaxism was demonstrated in all tests except one, with specimens in the size-class 500–1000 μm giving particularly significant results for the months of June and July 1994. Specimens were significantly geotactic for three of thirteen tests: both negative and positive geotaxism were demonstrated.