Figure 3
Temporal position of first (a) and second break (b) as a function of development time and worker efficiency. Since break duration differs when worker efficiency c and development time T are changed, optimal break timing was estimated for each parameter combination, when within-break Q was just high enough to ensure the emergence of a (very short) fitness increasing break. Model parameters: off-break survival q = 0.95, season length L = 100. Within-break survival (Q) was chosen sufficiently high to ensure the emergence of breaks of minimum duration.