Fishing and Aquaculture Lesson

Multiple Choice

Which of the following is a potential benefit of using technological solutions in fishing and aquaculture?

• Reducing negative impacts on natural systems

• Increasing overfishing

• Decreasing biodiversity

• Ignoring sustainability concerns

Open Ended

Why is it important to consider the impact of human activities on the environment and biodiversity when discussing fishing and aquaculture?

Multiple Choice

What is the main difference between aquaculture and capture fisheries as shown in the graph?

• Aquaculture yields have plateaued, while capture fisheries continue to grow

• Both aquaculture and capture fisheries yields have plateaued

• Capture fisheries yields plateaued, while aquaculture yields continue to grow

• Aquaculture yields are always lower than capture fisheries

Multiple Choice

Based on the graph, what happened to capture fisheries yields after the early 1980s?

• They continued to increase rapidly

• They plateaued and stopped increasing

• They decreased significantly

• They fluctuated but showed no clear trend

Multiple Choice

Which of the following factors limits the productivity of a fishery?

• Amount of sunlight

• Growth of algae and plankton

• Presence of large fish

• Water temperature

Open Ended

Explain how nutrient availability affects fishery productivity, using the information from the food web pyramid and the text.

Multiple Select

Based on the map, which regions of the world have the highest fishing yields? Select all that apply.

• Coastal areas of Europe

• Upwellings off the coast of South America

• Central Pacific Ocean

• Deserts of Africa

Multiple Choice

Why are coasts considered productive fisheries?

• Because they have high nutrient levels as sediments erode from land

• Because they are far from human activity

• Because they have deeper waters

• Because they have less sunlight

Open Ended

Explain how upwellings support productive fisheries.

Multiple Select

Which of the following factors contribute to productive fisheries, as shown in the first two images?

• High nutrient levels from eroded sediments

• Upwellings bringing sediment-rich water

• Low wind activity

• Lack of sunlight

Multiple Choice

Which fishing method uses sprayed water and bait fish to simulate a school of prey?

• Pole and line

• Trolling

• Longline fishing

• Net fishing

Multiple Choice

What is a key difference between trolling and longline fishing methods?

• Trolling uses moving ships, while longline fishing uses stationary ships

• Trolling drags baited lines behind moving ships, while longline fishing attaches many baited hooks to a single long line

• Longline fishing is only used in freshwater, while trolling is used in saltwater

• Trolling uses nets, while longline fishing uses hooks

Multiple Choice

Which lined fishing method is described as highly efficient and effective, but has high rates of bycatch?

• Longline fishing

• Purse-seining

• Drift-netting

• Bottom-trawling

Open Ended

Compare the environmental impacts of longline fishing and purse-seining based on their methods and bycatch rates.

Multiple Choice

What is the main characteristic of drift-netting as a fishing method?

• It uses a bag-shaped net pulled to the surface.

• It drags long nets in the water column not anchored to the ocean bottom.

• It drags a weighted net along the ocean floor.

• It uses individual fishing lines.

Multiple Select

Which of the following fishing methods have very high bycatch rates?

• Longlining

• Drift-netting

• Bottom-trawling

• Purse-seining

Multiple Choice

According to the diagram, which fishing method is the most ecologically destructive and has the highest bycatch rate?

• Pole and line

• Purse-seining

• Drift-netting

• Bottom-trawling

Multiple Choice

Which of the following factors contributed to the unusually high productivity of the Grand Banks fisheries?

• Mixing of cold and warm ocean currents

• Shallow continental shelf

• Nutrient-rich bottom sediments

• All of the above

Multiple Choice

What two ocean currents influence the Grand Banks, and how does their interaction contribute to the productivity of the fisheries?

• Labrador Current and Gulf Stream; their mixing stirs up nutrient-rich sediments

• Pacific Current and Gulf Stream; their mixing warms the water

• Labrador Current and Pacific Current; their mixing cools the water

• Gulf Stream and Arctic Current; their mixing reduces nutrients

Open Ended

Explain how the structure of the food chain in the Grand Banks supported a large population of cod.

Open Ended

Discuss the social and economic impacts of the 1992 ban on all cod fishing in Canada.

Multiple Choice

Based on the graph, what major policy change did Canada implement in 1977 regarding fishing in the Grand Banks?

• Banned all cod fishing

• Allowed unlimited fishing

• Banned other countries from fishing within 200 miles of its border

• Increased fishing quotas

Open Ended

Reflecting on today's lesson about fishing and aquaculture, what is one way you think technology can help reduce the negative impacts of human activities on natural systems?