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’.

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Give two negative environmental impacts of aquaculture.

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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.

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Why is aquaculture considered essential for meeting future seafood demands?

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

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State one strategy that can help prevent overfishing.

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

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