Figure 5.

Δfood-discovery time (food-discovery time in the first run minus that in the third run) (a) and Δworker arrivals (the number of workers arriving at the food reward in the third run minus that in the first run) (b) when conditions deteriorated (pits are deployed only in the third run), when they improved (pits were deployed only in the first and second run), vs. the control (no pits, taken from the first experiment). Lines and × signs in the box centers stand for the median and mean. Boxes and error bars stand for the quartiles and the range.