Table 2 Dive parameters used for the calculations of energy landscapes corresponding to Gentoo Penguin Pygoscelis papua. The study was conducted on penguins breeding at New Island (Falkland/Malvinas Is.), during chick guard (December) in 2013 and 2014. Only the first foraging trip of each individual was included in the calculations in order to avoid individuals with more than one trip having more weight in the analyses. For sample sizes see Table 1. For means, ranges are given in brackets, while for medians 75 and 25% quartiles are given
From: How animals distribute themselves in space: variable energy landscapes
| Â | 2013 | 2014 | |
|---|---|---|---|
South End | South End | North End | |
Maximum dive depth [m] | 188.3 | 178.2 | 156.3 |
Mean number of dives per foraging trip (MND) | 298 (176–674) | 265 (81–648) | 280 (192–343) |
 Mann-Whitney Rank Test between seasons | T = 50.000 | P = 0.405 |  |
 Mann-Whitney Rank Test between colonies |  | T = 36.000 | P = 0.445 |
Mean dive duration (DD), benthic dives [s] | 166 (112–215) | 175 (145–244) | 180 (125–213) |
 Mann-Whitney Rank Test between seasons | T = 96 | P = 0.002 |  |
 Mann-Whitney Rank Test between colonies |  | t = 0.367 | P = 0.721 |
Mean dive duration (DD), pelagic dives [s] | 109 (87–158) | 118 (112–140) | 123 (108–146) |
 Mann-Whitney Rank Test between seasons | t = −1.610 | P = 0.126 |  |
 Mann-Whitney Rank Test between colonies |  | t = −0.409 | P = 0.690 |
Median dive event maximum depth [m] | 21.9 (8.0–97.1) | 45.1 (14.2–93.2) | 45.2 (16.0–91.2) |
 Mann-Whitney Rank Test between seasons | T = 54,929,247.5 | P < 0.001 |  |
 Mann-Whitney Rank Test between colonies |  | T = 34,821,241.0 | P = 0.985 |
Median dive depth of pelagic dives [m] | 15.8 (6.3–77.0) | 12.7 (5.8–41.2) | 21.1 (9.2–48.9) |
 Mann-Whitney Rank Test between seasons | T = 1,203,123.5 | P < 0.001 |  |
 Mann-Whitney Rank Test between colonies |  | T = 834,201.5 | P < 0.001 |
Mean proportion of benthic dives (pBD) [%] | 24 (10–40) | 54 (22–72) | 48 (30–76) |
Mean proportion of pelagic dives (pPD) [%] | 76 (61–90) | 46 (27–78) | 52 (24–70) |
 t-test between seasons | t = −3.828 | P = 0.002 |  |
 t-test between colonies |  | t = −0.426 | P = 0.678 |
Minimum benthic bottom time (mBBT) [s] | 2 | 3 | 2 |