Atlantic Bluefin Tuna: Superfish of the oceans Dr Lucy Hawkes Frank - PowerPoint PPT Presentation

Atlantic Bluefin Tuna: ‘Superfish’ of the oceans Dr Lucy Hawkes

Frank Buckland

Museum of Economic Fish Culture, 1865

Vinegar

275 kg 243 kg 286 kg 270 kg 301 kg 287 kg Scarborough

Sir Francis Russell Aboard the St George

Superfish

Belly Fat content (%) Dorsal Anal

Even in freezing water: 20-24 ° C Norway

Gills

Gills

Brown trout Rainbow trout 593 cm 2 1,767 cm 2 (24 x 24 cm) (42 x 42 cm) 80 cm 75 cm Common carp Bluefin tuna 2,177 cm 2 287 m 2 (47 x 47 cm) (17 x 17 m) 80 cm 2.4 m (80 cm = 95 m 2 )

2500 mg O 2 .kg -1 .hr -1

300 250 Fork length (cm) 200 150 100 50 0 5 10 15 20 25 30 35 Age (year)

* * *

* * *

4 to 9 years old

Purse seining

Tuna “ranching”

Reduction of >50% in 3 generations

Less well off than…

Country Quota (tonnes) Albania 156 Algeria 1,446 China 90 Egypt 266 60,000 - 180,000 EU 17,623 fish Iceland 147 Japan 2,544 Korea 184 Libya 2,060 Morocco 2,948 Norway 239 Syria 73 Tunisia 2,400 Turkey 1,880 Taipei 84 TOTAL 32,240

Lands End, Charles Hood

“What objection can be reasonably argued against the employment of revenue cruisers for the accommodation of naturalists, appointed by government… in order that they make a thoroughly practical examination of the dark and mysterious habits of food fishes.” - Frank Buckland

Western Eastern

Isle of Harris, Scotland

Thank you!