论文部分内容阅读
蝉一生中的大部分时间都在地下度过,这些圆滚滚的褐色虫子结束休眠来到地面的间隔期是7年,13年或是17年——都是质数。智利大学的物理学家埃里克·科尔斯和德国马克斯·普朗克学院的马里奥·马库斯感到这种数字模型背后存在着某种进化逻辑。为了证明这一点,研究者们设计了一个关于蝉与其天敌之间互动关系的计算机模型。任这个模型中,天敌和猎物按照随机设定的生命周期活动。如果蝉出来的时候有许多天敌环伺在
The cicadas spend most of their life in the ground, and the bumpy brown bugs come to sleep seven, 13, or 17 years from the end of their hibernation - all prime. Eric Coles, a physicist at Chilean University, and Mario Marcus, at the Max Planck Institute in Germany, feel that there is some sort of evolutionary logic behind this digital model. To prove this, the researchers devised a computer model of the interaction between cicada and its predators. In this model, natural enemies and prey activities according to a randomly set life cycle. If the cicadas come out there are many natural enemies ring in