The lateral line can mediate rheotaxis in fish
The lateral line can mediate rheotaxis in fish
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DOI：
10.1038/40135
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发表时间：
1997-10-30
期刊：
影响因子：
64.8
通讯作者：
Carton, AG
中科院分区：
文献类型：
--
作者：
Montgomery, JC;Baker, CF;Carton, AG
流变性是对水流的一种行为取向(1)。生理学上已经证明，某些侧线受体特别适合提供水流信息(2)，但它们对血流变异性的贡献在很大程度上被忽视了。公认的观点是，血液流变是由视觉和触觉线索调节的，而在血液流变定向中，侧线只起到很小的作用(3)。在这里，我们提供了一个直接的证据，即血液流变性可以通过侧线，甚至是通过这个系统的一个特定的受体类别来调节。在三种不同的鱼类中，整个侧线系统的药物阻断大大增加了血液流变行为的速度阈值。当只消融浅层神经肥大时，观察到同样的效果，而阻断另一类感受器，管道神经肥大，则没有这样的效果。因此，我们的结果表明，浅表神经肥大对鱼类的流变性行为有重要贡献。
Rheotaxis is a behavioural orientation to water currents(1). It has been demonstrated physiologically that some lateral-line receptors are particularly well suited to provide information on water currents(2), but their contribution to rheotaxis has been largely overlooked. The accepted view is that rheotaxis is mediated by visual and tactile cues', and that in rheotactic orientation ''the lateral lines play only a minor role''(3). Here we provide a direct demonstration that rheotaxis can be mediated by the lateral line, and indeed by one specific receptor class of this system. In three diverse fish species, pharmacological block of the entire lateral-line system substantially increases the velocity threshold for rheotactic behaviour. The same effect is observed when only superficial neuromasts are ablated, whereas blockade of the other receptor class, canal neuromasts, has no such effect. Our results therefore demonstrate that superficial neuromasts make an important contribution to rheotactic behaviour in fish.