DOC《Fishes' Lateral Lines Sense Pressure and Predators》

Fishes' Lateral Lines Sense Pressure and Predators 鱼的侧线能感知压力和捕食者 A lot of fishermen will tell you that fish have kind of a sixth sense.

They avoid obstacles, effortlessly slalom between vortices or whirlpools, and hide from predators―even when they can't see. But how do they do it? 许多渔民都会说鱼似乎有第六感.它们能避开障碍物,毫不费力地在涡流或漩涡间游走,并可躲避捕食者――即使是在他们看不到的情况下.但它们是如何做到的呢? Researchers from the University of Florida and New York University think they've found the answer. Nearly all fish, they say, have a similar network of sensors along their bodies that are exquisitely sensitive to changes in water pressure. The report is in the journal Physical Review Letters. 来自佛罗里达大学和纽约大学的研究人员认为他们已经找到了答案.他们表示,几乎所有鱼的身体上都有一个类似的感知网,能够敏锐地感知到水中压力的变化.该研究报告发表于《物理评论快报》杂志. For the study, the researchers made a plastic rainbow trout with an accurate configuration of flow sensors on its body. Known as the "lateral line," these sensors apparently act like a hydrodynamic antenna, picking up signals about the flow of water around them. 在这项研究中,研究人员制作了一个塑料虹鳟鱼,并在其身体上安装了一个非常精确的水流量传感器配置.这些传感器即俗称的"体侧线",它们的作用就像水动力天线,接收来自它们周围的水流量信号. They put the fake fish in water, and simulated important real-life situations―for example, a bigger fish swimming nearby that might want to turn the trout into sushi. The researchers noted that the natural setup of the fish's sensors includes a higher density of them on the parts of the body subject to the greatest pressure changes. So the sensory awareness of its environment is highly resolved―showing that the notion that fish have a sixth sense isn't fishy at all. 他们把假鱼放入水中,并模拟将其置身于现实中的重要情境――例如,一条较大的鱼逼近想把它当寿司吃掉.研究人员发现当经受最强大的压力变化时,鱼天然的传感器会在鱼身上含有较高密度的感应.因此传感器能感应周围环境已是不争的事实――这就表明认为鱼有第六感的想法一点也不可疑. A lot of fishermen will tell you that fish have kind of a sixth sense. They avoid obstacles, effortlessly slalom between vortices or whirlpools, and hide from predators―even when they can't see. But how do they do it? Researchers from the University of Florida and New York University think they've found the answer. Nearly all fish, they say, have a similar network of sensors along their bodies that are exquisitely sensitive to changes in water pressure. The report is in the journalPhysical Review Letters. [Leif Ristroph, James C. Liao and Jun Zhang, Lateral Line Layout Correlates with the Differential Hydrodynamic Pressure on Swimming Fish] For the study, the researchers made a plastic rainbow trout with an accurate configuration of flow sensors on its body. Known as the "lateral line," these sensors apparently act like a hydrodynamic antenna, picking up signals about the flow of water around them. They put the fake fish in water, and simulated important real-life situations―for example, a bigger fish swimming nearby that might want to turn the trout into sushi. The researchers noted that the natural setup of the fish's sensors includes a higher density of them on the parts of the body subject to the greatest pressure changes. So the sensory awareness of its environment is highly resolved―showing that the notion that fish have a sixth sense isn't fishy at all.