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Table 6 Habitat parameters of Blue Petrels, Thin-billed prions and Antarctic Prions from Kerguelen Islands

From: Niche switching and leapfrog foraging: movement ecology of sympatric petrels during the early breeding season

  Blue petrel Thin-billed prion Antarctic Prion
Pre-laying exodus Incubation Pre-laying exodus Incubation Pre-laying exodus Incubation
Bathymetry (m) 3484 ± 434 a 3723 ± 453 a,b 4271 ± 290 b 4205 ± 509 b 3529 ± 548 a 3251 ± 515 a
Sea surface temperature (°C) 5.3 ± 2.0 b 3.5 ± 1.6 a,b 3.0 ± 2.5 a 1.6 ± 1.4 a 3.7 ± 1.7 a,b 2.4 ± 0.6 a
Chlorophyll a (mg/m3) 0.20 ± 0.02 a 0.22 ± 0.03 a 0.25 ± 0.10 a 0.29 ± 0.20 a 0.45 ± 0.09 b 0.30 ± 0.09 a
Wind speed (m/s) 11.4 ± 0.6 b 10.4 ± 1.6 b,c 10.2 ± 1.0 c 10.7 ± 1.3 b,c 9.8 ± 0.9 c 8.5 ± 0.6 a
WindU (west – to east, m/s) 8.9 ± 1.3 b 5.3 ± 2.5 c 7.0 ± 1.5 b,c 7.3 ± 2.4 b,c 4.8 ± 2.6 a,c 2.0 ± 2.7 a
WindV (south to north, m/s) -1.1 ± 1.1 a 0.1 ± 2.2 a,b 1.3 ± 0.9 b −2.0 ± 1.6 a −2.0 ± 0.9 a −2.0 ± 2.2 a,b
  1. Bathymetry from ECMWF ETOPO1 Elevation, Daytime SST and Chlorophyll a from MODIS Ocean Aqua OceanColor (4 km, 8 day mean), wind from ECMWF Interim Full Daily SFC Wind (10 m above Ground), wind speed was calculated from the square root of the sums of squares of the V and U component. Kruskal-Wallis ANOVAs were carried out for each parameter, to test for differences among the groups. All parameters differed (χ2 > 17.9, df = 5, p < 0.003), and similar superscript letters denote homogenous subsets