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首页> 外文期刊>The Royal Society Proceedings B: Biological Sciences >Re-examining safety in numbers: interactions between risk dilution and collective detection depend upon predator targeting behaviour
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Re-examining safety in numbers: interactions between risk dilution and collective detection depend upon predator targeting behaviour

机译：从数量上重新检查安全性：风险稀释与集体检测之间的相互作用取决于掠食者的针对性行为

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Many studies document that individuals visually scan for predators less frequently when in the safety of larger groups. This widely replicated effect has generally been explained in terms of distinct predator detection and risk-dilution effects. We show that a strict distinction between detection and dilution disappears when information about attacks is imperfectly shared (as it is in reality). Furthermore, dilution and detection effects change depending on when during an attack the predator targets a particular prey individual for pursuit. Realistic detection and dilution effects probably interact with each other and also with the targeting behaviour of predators. Instead of considering detection and dilution effects on vigilance, it may be more profitable to consider each prey's probability of being targeted during an attack and its probability of escaping if attacked. This perspective emphasizes that a full understanding of safety in numbers requires an understanding of predator targeting strategies. [References: 37]
机译：许多研究表明，在较大群体的安全范围内，个体肉眼观察掠食者的频率较低。通常用不同的捕食者检测和风险稀释效应来解释这种广泛复制的效应。我们表明，当不完全共享有关攻击的信息时（实际上是如此），检测和稀释之间的严格区别就会消失。此外，稀释和检测效果取决于攻击过程中捕食者何时将特定的猎物个体作为追踪目标。现实的检测和稀释效果可能相互影响，也与掠食者的瞄准行为相互作用。与其考虑检测和稀释对警惕性的影响，不如考虑每个猎物在攻击过程中被瞄准的可能性以及被攻击时逃逸的可能性，可能会更有利可图。这种观点强调，对数量安全性的全面理解需要对捕食者针对性策略的理解。 [参考：37]

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