Fruit-Catching Fish Tune Their Fast Starts to Compensate for Drift
Fruit-Catching Fish Tune Their Fast Starts to Compensate for Drift
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DOI：
10.1016/j.cub.2008.10.066
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发表时间：
2008-12-23
期刊：
影响因子：
9.2
通讯作者：
Schuster, Stefan
中科院分区：
文献类型：
--
作者：
Krupczynski, Philipp;Schuster, Stefan
许多动物航海家不仅要受风和洋流的摆布，还要克服漂流来达到目标[1-7]。在这里，我们报告了一条哥斯达黎加的水果捕捞鱼是如何结合空中运动分析和一种补偿漂移的新方法来优化其捕捞成功率的。在田野里，成群的河流鱼从不等到一个失败的果实落在小溪里。相反，这些鱼会对视觉运动做出反应，并早早到达食物会降落的地方。为了成功地提前开始，鱼必须应对由此产生的强烈的相对漂移，因为鱼，而不是它们的空中目标，在通往水果着陆点的途中经历了强烈的流动。令人惊讶的是，鱼类在一开始就解决了这个问题——通过快速转向并确定一个已经最佳适应主流漂移的初始目标，从而将它们直接引向食物。因此，捕捉水果的鱼类提供了一个惊人的例子，说明动物在日常生活中可以多么迅速地产生漂移补偿轨迹。
Numerous animal navigators are not simply at the mercy of winds and currents but cope with drift to reach their goals [1-7]. Here, we report how a fruit-catching Costa Rican fish combines an analysis of aerial motion with a novel way of compensating for drift to optimize its catching success. In the field, schools of this riverine fish never waited until a failing fruit actually landed in the stream. Rather, the fish responded to visual motion and started early to arrive on time at the spot where their food would land. To be successful with their early starts, the fish must cope with the strong relative drift that arises, because the fish, but not their airborne target, experience strong flow on their way toward the fruit's landing point. Surprisingly, the fish solve this problem right at the beginning-by turning rapidly and taking an initial aim that is already optimally adapted to the prevailing drift, so as to lead them straight to their food. Fruit-catching fish thus provide a stunning case of how rapidly animals can generate drift-compensating trajectories in their everyday local lives.