From: How animals distribute themselves in space: variable energy landscapes
 | 2013 | 2014 | |
---|---|---|---|
South End | South End | North End | |
Individuals tagged | 16 | 8 | 8 |
Number of complete data sets obtained (first foraging trips) | 13 | 4 | 6 |
Trip length [km] | 131.1 ± 59.1 (67.0–281.7) | 92.7 ± 64.7 (24.1–169.4) | 56.9 ± 13.7 (33.8–75.5) |
 t-test between seasons | t = 1.113 | P = 0.283 |  |
 Mann-Whitney Rank Test between colonies |  | T = 24.000 | P = 0.749 |
Maximum distance from colony [km] | 69.1 ± 9.8 (51.3–87.6) | 49.6 ± 33.0 (13.8–89.3) | 33.3 ± 17.3 (15.3–60.1) |
 Mann-Whitney Rank Test between seasons | T = 26.000 | P = 0.282 |  |
 t-test between colonies |  | t = −1.038 | P = 0.330 |
Trip duration [min] | 1811.5 ± 754.4 (770.6–2965.1) | 1636.6 ± 1162.8 (320.7–3066.6) | 1183.0 ± 353.4 (798.2–1650.8) |
 t-test between seasons | t = 0.129 | P = 0.725 |  |
 Mann-Whitney Rank Test between colonies |  | T = 25.000 | P = 0.610 |
Start time of foraging (local time) | 07:14:53 ± 06:14:24 (02:12:13–19:16:23) | 15:07:12 ± 04:50:53 (08:10:50–18:38:50) | 10:22:05 ± 08:05:17 (02:47:49–20:26:48) |
 Mann-Whitney Rank Test between seasons | T = 54.000 | P = 0.048 |  |
 t-test between colonies |  | t = 1.044 | P = 0.327 |