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Figure 2 | BMC Evolutionary Biology

Figure 2

From: The evolution of activity breaks in the nest cycle of annual eusocial bees: a model of delayed exponential growth

Figure 2

Relative fitness of single break strategies (compared to the case without a break) as a function of the time steps at the beginning (B1) and the end of a break (B2). Gray areas indicate beginning and end of fitness increasing breaks (shading of areas gives relative fitness of colonies following a respective break strategy). The different figures correspond to scenarios differing in within-break survival Q. Increasing within-break survival results in the emergence of two additional areas that represent fitness increasing breaks and which increase in size (b, c, d) with increasing protection during the breaks. For referring to the three prominent areas of fitness increasing breaks in the text we labelled them type I, II and III (c). Model parameters: worker efficiency c = 0.5, off-break survival q = 0.95, development time T = 20, season length L = 100.

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