Figure 4. Distances walked (l) and speeds (v) measured in the different carriers involved in pellet transport as a function of time (t).

Black dots and solid regression lines represent excavators, grey dots and dashed regression lines short-distance carriers, and white dots and dotted regression lines long-distance carriers. (A) Distances covered (in cm) during one transport event by excavators (first day: l = 0.53·t+7.7, NS; second day: l = −0.07·t+11.4, NS), short-distance carriers (first day: l = 0.71·t+14.0, NS; second day: l = −0.58·t+32.8, NS) and long-distance carriers (first day: l = 1.98·t+142.0, NS; second day: l = 2.13·t+108.8, NS; for 1.6% confidence intervals see Table 1). (B) Walking speed in each transport event for excavators (first day: v = 0.18·t+7.9, r ² = 0.02, N = 60, NS; second day: v = −0.003·t+9.2, r ² = 0.0005, N = 73, NS), short-distance carriers (first day: v = 0.17·t+4.4, r ² = 0.01, N = 168, NS; second day: v = 0.11·t+2.3, r ² = 0.008, N = 113, NS) and long-distance carriers (first day: v = 0.04·t+9.9, r ² = 0.0008, N = 60, NS; second day: v = −0.008·t+11.9, r ² = 0.007, N = 73, NS). (C) Proportion of long-distance carriers among individuals that picked up pellets. The number of observed pick-up events is shown in parentheses for each time interval.