Mechanosensory-based orientation to elevated prey by a benthic fish
Mechanosensory-based orientation to elevated prey by a benthic fish
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DOI：
10.1080/10236240009387097
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发表时间：
2000-01-01
影响因子：
1
通讯作者：
Coombs, S
中科院分区：
文献类型：
--
作者：
Abboud, JA;Coombs, S
密歇根湖斑杜父鱼 Cottus bairdi 对活体和人工（例如振动球体）猎物做出反应，无条件地向振动源移动，然后逐步接近并最终攻击振动源。除了这些经过充分研究的沿着基底水平面的全身运动之外，杜父鱼还表现出一种很少被研究的行为，其中鱼头的垂直位置可以从与基底保持安静到在基底上方几厘米之间变化。为了检验杜父鱼可以通过机械感觉线索确定源高度的假设，我们测量了当鱼接近一个小的（半径 3 毫米）、50 Hz 振动球体时，盲鱼的头部高度作为源高度和距离的函数。在与打击前位置（< 2 cm）相关的距离处，在用 CoCl2 药物阻断侧线之前，头部抬高与源抬高呈正相关，但在之后则不然。这些结果表明，杜父鱼能够仅使用机械感觉线索来确定源高度，并且在没有视觉和嗅觉线索的情况下，头部朝向源的垂直方向需要侧线系统。
Lake Michigan mottled sculpin, Cottus bairdi, respond to both live and artificial (e.g., vibrating sphere) prey with an unconditioned movement towards the source of vibration, followed by a step-by-step approach and final strike at the source. In addition to these well-studied, whole-body movements along the horizontal plane of the substrate, sculpin exhibit a little-studied behavior in which the vertical position of the fish's head can vary from being hush with the substrate to several cm's above the substrate. To test the hypothesis that sculpin can determine source elevation via mechanosensory cues, we measured head elevation of blinded fish as a function of source elevation and distance as fish approached a small (3 mm radius), 50 Hz vibrating sphere. At distances associated with pre-strike positions (< 2 cm), head elevations were positively correlated with source elevation before but not after pharmacological blocking of the lateral line with CoCl2. These results demonstrate that sculpin are able to determine source elevation using mechanosensory cues alone and that in the absence of visual and olfactory cues, vertical orientation of the head towards the source requires the lateral line system.