Marine Productivity and Aquaculture Quiz

Which of the following best explains why continental shelves generate ~50% of marine productivity?

• They are located near the poles

• Upwellings bring nutrients to shallow waters where light can penetrate

• They are located in the deep ocean where biodiversity is high

• Most countries ban fishing near continental shelves

What percentage of primary productivity in the oceans is produced by phytoplankton?

• 70%

• 80%

• 90%

• 99%

Define the term ‘aquaculture’.

Give two negative environmental impacts of aquaculture.

What is the term for the phenomenon where shared resources are overused and depleted because individuals act in their own interest?

• The Tragedy of the Commons

• The Law of the Sea

• Common Resource Distribution

• Ecological Collapse

Name two unsustainable commercial fishing practices and explain briefly why they are harmful.

Why is aquaculture considered essential for meeting future seafood demands?

What is one ethical issue surrounding fisheries mentioned in the document?

State one strategy that can help prevent overfishing.

What is a major concern with net-cage aquaculture used for salmon farming in the Pacific?