Tuna Aquaculture

Question 1

What are the advantages of tuna aquaculture?

Answer 1

• High market demand

- Reduced amount of wild stock fished

Question 2

What are the disadvantages of tuna aquaculture?

Answer 2

• Typically no brood stock
• Wild juveniles are caught for aquaculture - not sustainable
• Large amount of prey species are removed from the ocean to feed captive tuna.
• Large amounts of waste food falls as pollution from nets.
• Many species of fish are killed when they enter the nets full of fast swimming tuna

Question 3

What does the removal of wild juuveniles cause?

Answer 3

prevents recruitment of wild stock

Question 4

Explain the method of tuna aquaculture

Answer 4

• Juvenile fish caught in wild using purse seine nets
• Placed in cages and towed to farms
• Juveniles raised in large farm cages for 8 months
• Fed intensively 1-3 times daily (shellfish, sardines, pilchards, herring, mackerel and squid)
• Scuba divers monitor feeding to prevent over feeding