Detection of water surface waves by nile crocodiles (Crocodylus niloticus)

尼罗河鳄鱼（Crocodylus niloticus）检测水面波浪

• 批准号: 242438159
• 负责人: Professor Dr. Horst Bleckmann
• 金额: --
• 依托单位: Abteilung für Vergleichende Sinnes- und Neurobiologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/242438159?language=en
• 关键词: Detection; water; surface; waves; nile

The 23 species of crocodiles belong to the largest living reptiles. Depending on their age, crocodiles prey on insects fallen into the water and on frogs, fish and terrestrial vertebrates. The skin of all crocodiles contains Dome Pressure Receptors (DRPs). These receptors respond to direct touch and to subsurface and surface water motions. Although studies have shown that crocodiles use their DRPs to sense water surface waves, quantitative experiments that have investigated the full behavioral capability of this sensory system are missing. In the applied research project we want to determine the behavioral thresholds of crocodiles to sinusoidal water surface waves. In addition we want to study to which precision crocodiles can discriminate water surface waves that differ in frequency, frequency content and in frequency or amplitude modulation. In further experiments we will investigate whether crocodiles can recognize a surface wave signal in the presence of a second surface wave train generated at a different location. Finally we want to find out whether and for how long crocodiles can remember a learned discrimination task.

鳄鱼有23种，属于现存最大的爬行动物。根据年龄的不同，鳄鱼捕食落入水中的昆虫、青蛙、鱼类和陆生脊椎动物。所有鳄鱼的皮肤都含有圆顶压力感受器（DRP）。这些受体对直接触摸以及地下和地表水运动做出反应。尽管研究表明鳄鱼利用 DRP 来感知水面波浪，但仍缺乏研究该感觉系统完整行为能力的定量实验。在应用研究项目中，我们想要确定鳄鱼对正弦水面波的行为阈值。此外，我们还想研究哪些精密鳄鱼可以区分频率、频率内容以及频率或幅度调制不同的水面波。在进一步的实验中，我们将研究鳄鱼是否可以在不同位置产生的第二个表面波序列存在的情况下识别表面波信号。最后，我们想知道鳄鱼是否能够记住习得的辨别任务以及能记住多久。

项目成果

Crocodylus niloticus (Crocodilia) is highly sensitive to water surface waves.

尼罗鳄（Crocodilia）对水面波浪高度敏感

• DOI: 10.1016/j.zool.2015.03.004
• 发表时间: 2015
• 期刊: Zoology
• 影响因子: 2
• 作者: Grap NJ;Monzel A;Kohl T;Bleckmann H
• 通讯作者: Bleckmann H