Absolute versus per unit body length speed of prey as an estimator of vulnerability to predation
Absolute versus per unit body length speed of prey as an estimator of vulnerability to predation
复制标题
猎物的绝对速度与单位体长速度作为捕食脆弱性的估计
DOI：
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发表时间：
1999
期刊：
影响因子：
2.5
通讯作者：
Tom J. M. Van Dooren
中科院分区：
文献类型：
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作者：
R. Damme;Tom J. M. Van Dooren
为了研究是否应该使用绝对（m/s）或相对（体长/s）速度来比较不同大小动物的脆弱性，我们开发了一个简单的计算机模拟。人类“捕食者”被要求“捕捉”（鼠标点击）不同大小的猎物，以不同的速度在电脑屏幕上移动。通过模拟，猎物逃脱捕食的机会取决于它的速度（速度快的猎物比身体大小相同的速度慢的猎物更难捕获），但也取决于它的大小（在相同的速度下，较大的猎物比较小的猎物更容易捕获）。捕捉时间，也就是捕捉猎物所需要的时间，也取决于猎物的速度和猎物的大小。相对猎物速度（体长/秒或体表/秒）是一个更好的预测捕捉时间比绝对猎物速度（米/秒）。我们的实验表明，与早期的断言相反，猎物每单位体长的速度可能比绝对速度更“具有生态相关性”。1999年，动物行为研究协会（Association for the Study of Animal Behaviour）
To study whether absolute (m/s) or relative (body lengths/s) speed should be used to compare the vulnerability of differently sized animals, we developed a simple computer simulation. Human ‘predators’ were asked to ‘catch’ (mouse-click) prey of different sizes, moving at different speeds across a computer screen. Using the simulation, a prey’s chances of escaping predation depended on its speed (faster prey were more difficult to catch than slower prey of the same body size), but also on its size (larger prey were easier to catch than smaller prey at the same speed). Catching time, the time needed to catch a prey, also depended on both prey speed and prey size. Relative prey speed (body lengths/s or body surface/s) was a better predictor of catching time than was absolute prey speed (m/s). Our experiment demonstrates that, in contrast to earlier assertions, per unit body length speed of prey may be more ‘ecologically relevant’ than absolute speed. © 1999 The Association for the Study of Animal Behaviour