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Table 1 Telemetry data summary

From: Divergent migration routes reveal contrasting energy-minimization strategies to deal with differing resource predictability

 

PTT id

Start (Departure)

Days

Sex

Length (m)

Mean distance (km day−1)

Total distance (km)

Sum steps (km)

Track SI

Offshore

98_20162*

10/5/1998

57

M

4.75

58.1

37.2

619.0

0.060

99_20168*

9/17/1999

40

M

4.44

57.5

159.2

345.6

0.461

17_172067*

9/20/2017

35

M

4.88

65.3

311.6

767.2

0.406

17_172065*

10/6/2017

56

M

4.58

67.4

219.4

795.2

0.276

17_172068*

9/23/2017

34

F

3.75

40.4

348.7

567.4

0.615

17_172253*

10/7/2017

27

F

3.90

55.6

390.2

787.4

0.496

Nearshore

97_6335*

9/28/1997

41

M

4.40

25.6

394.1

560.8

0.703

98_3961*

9/19/1998

46

M

5.00

51.0

68.5

766.6

0.089

98_20696

10/4/1998

10

F

3.80

44.2

416.4

597.5

0.697

99_3964*

9/26/1999

66

M

4.10

27.6

465.4

601.1

0.774

99_20687

10/1/1999

20

F

3.90

30.0

382.9

587.7

0.652

99_20689*

10/3/1999

28

F

4.05

17.4

159.2

319.5

0.498

17_172062*

10/9/2017

53

M

4.66

52.4

491.7

797.8

0.616

17_172066*

9/23/2017

29

M

4.32

65.5

322.5

443.2

0.728

17_172070*

10/7/2017

48

F

4.25

36.7

501.3

654.4

0.766

17_148687

10/14/2017

17

F

3.70

17.7

389.0

581.6

0.669

17_148688

10/6/2017

24

M

3.60

32.3

405.7

624.1

0.650

17_148690

10/23/2017

8

F

3.70

74.1

237.2

466.1

0.509

17_148696

10/18/2017

13

F

3.80

51.9

534.3

708.5

0.754

17_148694

10/17/2017

15

F

4.08

49.8

474.6

882.1

0.577

18_174728*

9/27/2018

37

F

3.57

62.9

586.07

901.0

0.650

  1. Individual narwhal with at least one location per day which selected either a nearshore or offshore migration route, including their corresponding platform terminal transmitter ID (PTT ID), the start dates of locations used in the analyses and the number of days the tag remained transmitting after, body length (m), and sex. Track straightness index (Track SI) was assessed by calculating the total distance travelled, divided by the summed step-lengths (sum steps) during the same period, where values closer to 1 indicate straighter paths and values closer to 0 indicate more tortuous movement. Individuals with a ‘*’ had sufficient data (> 150 locations at 4-h intervals) spanning the migration period to include in the move-persistence model to evaluate movements tied with environmental conditions and stop-over behaviours
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Movement Ecology

ISSN: 2051-3933