Table 1 Data and summary statistics on tagged Atlantic bluefin tuna tagged in Skagerrak in 2017.

From: First tagging data on large Atlantic bluefin tuna returning to Nordic waters suggest repeated behaviour and skipped spawning

Tag ID

CFL (cm)

Origin

Tag date

Tag position (lat, long)

Detach date

Detach position (lat, long)

Detach reason

Days at large

Total track length (km)

Temperature (°C) Area 3a

Depth Area (m) 3a

Exit Area 3a

Days in Area 3a

Tagging strategy

Tag team

162993

227

MED

Sep 09

58.09, 10.80

Oct 07, 2017

59.27, 5.17

Premature

28

1252

15.8 (15.4–16.4)

18 (1–188)

Sep 17

8

In water

Sweden

162995

240

MED

Sep 15

58.04, 10.88

Oct 02, 2017

58.41, 9.10

Premature

17

925

15.2 (12.5–16.2)

11.6 (0–328)

Oct 15

30

In water

Sweden

162997

235

MED

Sep 15

58.05, 10.90

Oct 22, 2017

59.43, 4.70

Premature

37

1324

15.1 (12.7–16.6)

22.5 (0–216)

Oct 16

31

In water

Sweden

163000

225

MED

Sep 15

58.09, 10.96

Oct 26, 2017

58.41, − 7.67

Pin broke

41

1850

14.5 (12.7–15.9)

23.1 (0–320)

Oct 18

33

In water

Sweden

163001

256

MED

Sep 16

58.06, 10.82

Oct 16, 2017

60.96, 4.00

Premature

30

1808

15.1 (12.1–16.5)

16.3 (0–264)

Oct 06

20

In water

Sweden

163002

215

MED

Sep 16

58.08, 10.83

Oct 07, 2017

58.38, 1.93

Premature

21

1545

15.3 (14.8–15.8)

15 (0–68)

Sep 18

2

In water

Sweden

163004

240

MED

Sep 22

58.14, 11.02

Oct 31, 2017

58.62, 4.91

Premature

39

1819

14.2 (12.4–15.8)

28.2 (0–520)

Oct 24

32 days

In water

Sweden

163005

239

MED

Sep 22

58.03, 10.75

Oct 09, 2017

62.41, 3.75

Premature

17

1486

15.2 (13–15.9)

17.1 (0–464)

Sep 30

8 days

In water

Sweden

34840

247

MED

Sep 09

MED

Sep 03, 2018

58.43, 10.58

Pin broke

359

22,268

14.8 (12.6–16.5)

20.1 (0–172)

Oct 17

38 days

Onboard

Denmark

34859

246

MED

Sep 18

58.01, 10.78

Sep 18, 2018

57.77, 4.57

Completed

365

25,937

15 (14.6–15.5)

NA (NA–NA)

NA

NA days

Onboard

Denmark

34861

221

MED

Sep 23

58.03, 10.65

Apr 27, 2018

42.14, -51.63 MED

Pin broke

216

16,002

14.5 (12.2–15.8)

23.4 (0–216)

Oct 15

22 days

In water

Denmark

162996

230

MED

Sep 15

58.06, 10.65

Sep 18, 2017

58.05, 11.15

Premature

3

NA

NA (NA–NA)

NA (NA–NA)

NA

NA days

In water

Sweden

163003

227

MED

Sep 21

58.12, 10.96

Sep 24, 2017

58.18, 10.89

Premature

3

NA

NA (NA–NA)

NA (NA–NA)

NA

NA days

In water

Sweden

34839

251

MED

Sep 09

58.04, 10.67

Sep 12, 2017

58.04, 10.62

Premature

3

NA

NA (NA–NA)

NA (NA–NA)

NA

NA days

Onboard

Denmark

162992

225

MED

Sep 09

58.17, 11.01

NA

NA;NA

NA

NA

NA

NA (NA–NA)

NA (NA–NA)

NA

NA days

In water

Sweden

162994

185

MED

Sep 09

58.08, 10.88

NA

NA;NA

NA

NA

NA

NA (NA–NA)

NA (NA–NA)

NA

NA days

In water

Sweden

162998

230

MED

Sep 15

58.03, 10.90

NA

NA;NA

NA

NA

NA

NA (NA–NA)

NA (NA–NA)

NA

NA days

In water

Sweden

162999

245

GOM

Sep 15

58.05, 10.92

Dec 22, 2017

64.98, 10.77

Premature

98

NA

NA (NA–NA)

NA (NA–NA)

NA

NA days

In water

Sweden

  1. Origin refer to the genetic assignment to either the Mediterranean (MED) or Gulf of Mexico (GOM) populations. Premature detachment refers to tags surfacing and initiating transmission before the programmed date for unknown reasons. Pin broke refers to the release pin breaking without the release mechanism initiated (e.g. due to large stress on the pin). Completed means tag initiated release on programmed time. NA indicates data that is not available due to poor data transmission, or tags that never transmitted. Range is provided in brackets.