Winkelnkemper Jan, Kranz Simon, Bleckmann Horst
Institute for Zoology, Poppelsdorfer Schloss, University of Bonn, 53115, Bonn, Germany.
J Comp Physiol A Neuroethol Sens Neural Behav Physiol. 2018 Feb;204(2):155-166. doi: 10.1007/s00359-017-1217-1. Epub 2017 Oct 26.
Fish use their mechanosensory lateral line amongst others for the detection of vortices shed by an upstream object and/or for the detection of vortices caused by the tail fin movements of another fish. Thus, vortices are one type of hydrodynamic stimuli to which fish are exposed in their natural environment. We investigated the responses of medullary lateral line units of common rudd, Scardinius erythrophthalmus, and common nase, Chondrostoma nasus (Cyprinidae), to water flow (9.5-13.3 cm) that contained vortices (a Kármán vortex street) shed by an upstream cylinder (diameter 2 cm). The distance between the cylinder and the tip of the fish's snout varied between 8 and 24 cm. 21 out of 42 units (S. erythrophthalmus), respectively, 9 out of 39 units (Chondrostoma nasus) responded to the vortices shed by the cylinder. Up to a cylinder distance of 24 cm, interburst intervals revealed the vortex shedding frequency, i.e., burst frequency was similar to or identical with the vortex shedding frequency.
鱼类利用其机械感觉侧线等器官来探测上游物体脱落的漩涡和/或另一条鱼的尾鳍运动所产生的漩涡。因此，漩涡是鱼类在自然环境中所接触到的一种水动力刺激。我们研究了赤睛鱼（Scardinius erythrophthalmus）和赤鼻棱鳀（Chondrostoma nasus，鲤科）延髓侧线单位对含有由上游圆柱体（直径2厘米）脱落的漩涡（卡门涡街）的水流（9.5 - 13.3厘米）的反应。圆柱体与鱼吻尖端之间的距离在8至24厘米之间变化。42个单位中的21个（赤睛鱼），分别地，39个单位中的9个（赤鼻棱鳀）对圆柱体脱落的漩涡有反应。在圆柱体距离达24厘米时，爆发间期显示出漩涡脱落频率，即爆发频率与漩涡脱落频率相似或相同。
