EVIDENCE FOR THE DILUTION EFFECT IN THE SELFISH HERD FROM FISH PREDATION ON A MARINE INSECT
EVIDENCE FOR THE DILUTION EFFECT IN THE SELFISH HERD FROM FISH PREDATION ON A MARINE INSECT
复制标题
鱼类捕食海洋昆虫的自私群稀释效应证据
DOI：
10.1038/293466a0
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发表时间：
1981-01-01
期刊：
影响因子：
64.8
通讯作者：
TREHERNE, JE
中科院分区：
文献类型：
--
作者：
FOSTER, WA;TREHERNE, JE
有人提出，群居行为进化背后的一个主要因素是被捕食者攻击的风险降低。个体通过加入群体获得保护免受捕食者侵害的一种方式是通过简单的“稀释”效应——对于任何一次捕食者的攻击，被捕食动物群体越大，任何特定个体成为受害者的机会就越小。我们在这里提出了对海洋昆虫捕食的实地观察，这是第一次有可能量化稀释效应的大小，并将其与群体生活的其他好处区分开来。
It has been proposed that a major factor underlying the evolution of gregarious behaviour is a reduction in the risk of being attacked by predators1-3. One way in which individuals may gain protection from predators by joining a group is through a simple'dilution'effect-for any one predator attack, the larger the group of prey animals, the smaller is the chance that any particular individual will be the victim. We present here field observations of predation on a marine insect, in which it is possible, for the first time, to quantify the magnitude of the dilution effect and distinguish it from other benefits of group living.