Download - Movements and diving behaviour of mako shark in North Atlantic

Movements and diving

behaviour of mako shark in

North Atlantic Gonzalo Mucientes, Nuno Queiroz, Nicholas Humphries & David Sims

Next amazing minutes…

• Aim

• Intro

• Methods: – Transmitters

– Tagging

• Results: – Tracks

– Diving behaviour

Aim

• The aim of this study is to elucidate for

the first time the movements and

behaviour of shortfin mako sharks from

satellite-linked electronic tagging

Intro • Short fin mako shark (Isurus oxyrinchus)

is a pelagic shark

• Lamnidae family

• Circumglobal distribution

• Highly migratory

• Ovoviviparity with oophagy

• Target by longliners (meat and fins)

Methods: Tagging

• 15 makos tagged (2009-2011)

• PATs (Mk10): 30, 60, 90, 120, 180 days (time set)

Tagging

• MAKO 86400

• Sex: Male

• FL: 125 cm

• Tagging: 24/April/2009

• Time: 30 days

• Pop-up: 24/May/2009

• Distance traveled: 1408.5 km

• 46.9 km/day

• MAKO 86399

• Sex: Male

• FL: 140 cm

• Tagging: 25/June/2010

• Time: 60 days

• Pop-up: 24/August/2010

• Distance traveled: 3118 km

• 51.1 km/day

• MAKO 86401

• Sex: Male

• FL: 220 cm


• Time: 90 days

• Pop-up: 28/September/2010


• 57.9 km/day

• MAKO 86407

• Sex: Male

• FL: 130 cm

• Tagging: 03/July/2010

• Time: 90 days

• Pop-up: 01/October/2010


• 41 km/day

• MAKO 96030

• Sex: Female

• FL: 130 cm


• Time: 120 days

• Pop-up: 01/November/2010


• 50.2 km/day

• MAKO 96031

• Sex: Female

• FL: 165 cm


• Time: 120 days



• 39.4 km/day

• MAKO 86402

• Sex: Female

• FL: 170 cm

• Tagging: 24/April/2009

• Time: 60 days

• Pop-up: 23/June/2009


• 86.1 km/day

• MAKO 86408

• Sex: Male

• FL: 180 cm


• Time: 120 days



• 47.5 km/day

• MAKO 107089

• Sex: Female

• FL: 220 cm

• Tagging: 21/August/2011

• Time: 120 days

• Pop-up: 19/December/2011


• 43 km/day

• MAKO 107092

• Sex: Male

• FL: 170 cm

• Tagging: 03/September/2011

• Time: 120 days

• Pop-up: 01/January/2012


• 20.1 km/day

• MAKO 107091 (I. paucus)

• Sex: Female

• FL: 245 cm


• Time: 120 days



• 25.9 km/day

• MAKO 107090

• Sex: Male

• FL: 255 cm


• Time: 120 days



• 49.4 km/day

Results

125 130 130 140

165 170 170 170 170 180

220 220

240 245 255

0

50

100

150

200

250

300

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

7 8

Male Female

1

2 2

7

3

0

1

2

3

4

5

6

7

30 60 90 120 180

6 6

Sex Days

Length

Horizontal movements • Two main behaviours (selected tracks)

Feeding area Migration

Mako 86407

• Sex: Male

• FL: 180 cm


• Time: 120 days



• Ratio 47.5 km/day

Mako 86408

• Sex: Male

• FL: 130 cm


• Time: 90 days



• Ratio 41.1 km/day

Mako 86402

• Sex: Female • FL: 170 cm • Tagging: 24/abril/2009 • Time: 60 days

• Pop-up: 23/junio/2009 • Distance: 5168.5 km • Ratio: 86.2 km/day

• Sex: Female

• FL: 220 cm


• Time: 120 days



• 43 km/day

Mako 107089

Mako 96030 • Sex: Female

• FL: 130 cm


• Time: 120 days



• Ratio: 50.2 km/day

All tracks

Kernel density

Diving behaviour

• Depth

• Temperature (Thermocline)

• Time

Mako 86407

•Sex: Male •Tagging: 03/July/2010 •Time: 90 days

•Pop-up: 01/October/2010 •FL: 130 cm •Distance: 3700 km •Ratio: 41.11 km/day

Mako 86408

• Sex: Male

• FL: 180 cm


• Time: 120 days



• 47.5 km/day

0

10

20

30

0 200 400 600

MinTemp1

MaxTemp1

Mako 107090

• Sex: Male

• FL: 255 cm


• Time: 120 days



• 49.4 km/day

Mako 107089

• Sex: Female

• FL: 220 cm


• Time: 120 days



• 43 km/day

Diving behaviour - Length

• MAKO 107090

• Sex: Male

• FL: 255 cm • Tagging: 22/August/2011

• Time: 120 days



• 49.4 km/day

• MAKO 107092

• Sex: Male

• FL: 170 cm • Tagging: 03/September/2011

• Time: 120 days

• Pop-up: 01/January/2012


• 20.1 km/day

In general…

Temperature

Preys distribution

Thermocline

Diving behavoiur of

sharks

Conclusions

• Mako sharks displayed different movement and

residency patterns, including a trans-Atlantic migration

into western Iberia waters.

• Sharks also displayed deep diving behaviour into cold

water, with maximum recorded depths of 1744 m (I.

paucus) and 1480 (I. oxyrinchus), although most do not

exceed 600 m

• Temperature preferences ranging from 5.8 and 27ºC.

• Different behaviour between adult and juvenile makos.

Thanks

for your

attention!!

Contact:

[email protected]

[email protected]

This work was supported by FCT

(Fundação para a Ciência e a Tecnologia) and the Save our Seas

Foundation

mailto:[email protected]

mailto:[email protected]