Fitness reached by networks as a function of genome size and environmental challenge. Boxplot of fitness reached at the end of adaptation. Network size, 19, 14, 9, 6, 4, is presented with a gray level, lighter gray representing larger network sizes. Larger Network size facilitates adaptation to higher fitness. To uncover the difference between highly adapted networks, the scale used is -log(1-Fitness).
Le Nagard et al. BMC Evolutionary Biology 2011 11:326 doi:10.1186/1471-2148-11-326