highly significantp < 0.001
The time of measurement and the treatment × time interaction were highly significant (monthly measurement: F 16,160 = 6.78, p < 0.001, treatment × time: F 16,160 = 3.36, p < 0.001), indicating that all populations were growing, and that there were time-dependent differences in growth rates in the inbred and outbred founded populations (see Figure 3 ).