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Table 1 Data on instrumented bowhead whales in Disko Bay

From: Winter and spring diving behavior of bowhead whales relative to prey

  U-dives
WHALE Date of deployment Sex Days of deployment Mean depth at whale locations (m) Horizontal speed (m -s) Number of dives Number of dives U/V Maximum depth of dives U/V (m) Average number of dives pr. day U/V Mean distance from bottom U/V (m) Mean duration of bottom phase (s) Mean bottom speed (m/s) Mean depth <60 m (± SD) Mean depth >60 m (± SD) Proportion of time spent at the bottom % Descent rate ms -1 As-cent rate ms -1
BW1 28/4 F 33 210 0.26 3810 1884/195 186/256 116/57 76/293 481 0.6 29 (9) 75 (101) 32.67 1.36 -0.73
BW2 12/5 F 1 147 0.75 84 51/15 112/138 84/15 114/118 488 1.5 40 (9) 115 (51) 45.06 0.42 -0.48
BW3 5/5 M 2 124 0.59 294 147/49 195/270 147/25 74/60 702 1.5 40 (10) 88 (32) 31.99 0.61 -0.57
BW4 2/5 F 1 110 0.33 40 19/15 129/182 40/15 89/74 780 0.3 48 (10) 75 (5) 37.26 0.65 -0.78
BW5 31/3 F 25 214 0.22 1311 787/395 331/379 53/16 107/59 1070 0.4 30 (9) 171 (57) 31.24 0.62 -0.67
BW6 7/3 na 5 140 0.54 202 92/91 236/266 41/53 66/134 1497 0.9 28 (8) 181 (30) 32.13 0.88 -0.90
BW7 19/4 M 4 208 0.68 366 213/132 212/261 69/65 170/84 655 na* 30 (5) 120 (49) 42.01 0.35 -0.45
BW8 14/3 na 7 277 0.66 644 177/217 312/389 56/31 134/207 951 1.3 46 (10) 77 (155) 27.61 0.66 -0.69
BW9 23/3 na 27 194 0.72 856 608/127 427/582 32/5 145/82 1322 0.7 29 (9) 129 (84) 49.26 0.76 -0.75
    12 180 0.53    238 [0.14]/ 71 [0.18]/ 108 [0.11]/ 883 0.9 36 115 37 0.66 -0.70
Mean across whales     845 422/137           
    [0.36] [0.10] [0.13]    303 [0.15] 31 [0.23] 123 [0.21] [0.13] [0.18] [0.07] [0.12] [0.07] [0.31] [0.16]
  1. Only dives lasting longer than 5 min and targeting depths below 20 m are included. BW1 to BW4 were assumed to represent spring samples and the rest assumed to be winter samples. Standard deviations in parenthesis and coefficients of variation in square brackets. *No positions matched the surface periods.