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Table 3 Summary statistics (mean ± standard deviation) of change-point analysis using Mann–Whitney U tests before and after the habitat shift illustrated in Fig. 3

From: Behavior of satellite-tracked Antarctic minke whales (Balaenoptera bonaerensis) in relation to environmental factors around the western Antarctic Peninsula

  Date Before After
N Mean ± SD N Mean ± SD
Whale 1
SIE (km) 12 March 110 −0.42 ± 25.21 286 −239.26 ± 75.51
SIC (%) 11 March 106 2.20 ± 4.28 290 73.77 ± 9.09
Bath. (km) 12 March 110 −0.33 ± 0.23 286 −3.66 ± 0.77
SST (C) 6 March 91 1.04 ± 1.26 305 −1.61 ± 0.17
Whale 2
SIE (km) 9 March 106 30.95 ± 49.15 191 −64.08 ± 43.90
SIC (%) 24 March 169 0.85 ± 2.41 128 24.08 ± 15.80
Bath. (km) 18 March 145 −0.50 ± 0.22 152 −3.77 ± 0.58
SST (C) 25 February 62 2.04 ± 0.76 235 −1.25 ± 0.42
Whale 3
SIE (km) 8 March 97 14.40 ± 28.18 332 −4.55 ± 7.47
SIC (%) 1 June 403 1.90 ± 3.47 26 30.25 ± 8.46
Bath. (km)
SST (C) 22 February 46 2.13 ± 0.87 383 −0.21 ± 0.57
  1. All U tests listed are significant with p < 2.2e−16. SIE specifically refers to the whales’ distance to the sea ice extent, with negative values indicating the whale is within the pack ice