Skip to main content

Advertisement

Table 1 Inter-annual comparison of mean (± SD) short foraging trip parameters in short-tailed shearwaters rearing chicks at two breeding colonies

From: Breeding short-tailed shearwaters buffer local environmental variability in south-eastern Australia by foraging in Antarctic waters

Colony Years 2012 2013 2014 F df P-value
Gabo Island Birds tracked 9 8 4    
Trip duration (h) 16.2 ± 1.1 16.2 ± 1.4 17.2 ± 3.2 1.29 2, 18 0.30
Total distance travelled (km) 188.8 ± 58.6 182.1 ± 72.5 159.5 ± 51.7 2.27 2, 18 0.13
Maximum distance (km) 41.2 ± 8.6 41.9 ± 18.0 26.0 ± 9.1 0.15 2, 18 0.86
Bearing (°) 138.5 ± 109.9 91.5 ± 102.3 202.3 ± 38.7 2.21 2, 18 0.14
Home range (km2) 663.3 ± 217.8 827.1 ± 379.2 561.9 ± 214.3 1.28 2, 18 0.30
Foraging area (km2) 124.0 ± 33.2 179.0 ± 86.0 118.1 ± 69.3 1.93 2, 18 0.17
Griffith Island Birds tracked 9 1a 10    
Trip duration (h) 18.9 ± 7.1 18.2 25.3 ± 11.4 2.06 1, 17 0.17
Total distance travelled (km) 269.2 ± 143.1 276.0 581.3 ± 222.4 8.93 1, 17 0.008
Maximum distance (km) 78.3 ± 35.0 107.2 156.6 ± 54.4 10.34 1, 17 0.005
Bearing (°) 148.6 ± 54.4 115.9 158.9 ± 63.2 0.11 1, 17 0.74
Home range (km2) 1301.7 ± 687.7 1180.9 3271.1 ± 1406.1 14.48 1, 17 0.001
Foraging area (km2) 193.6 ± 124.6 182.3 606.2 ± 288.9 15.66 1, 17 0.001
  1. Significant results are indicated in bold (P > 0.05)
  2. aResults for Griffith Island in 2013 were not included in the analysis