Fishing Practices and Environmental Impact

The video explores aquatic food production systems, focusing on fisheries and aquaculture. It discusses marine ecosystems, the role of phytoplankton, and the impact of upwelling on productivity. The effects of El Nino on fisheries are examined, highlighting the challenges faced by the fishing industry. Various fishing methods are analyzed for sustainability, including dredging and gill nets. The video also covers aquaculture, its benefits, and drawbacks, such as pollution and genetic issues. Finally, it addresses international conflicts over fishing rights, emphasizing the need for sustainable practices.

What is the main cause of high productivity in shallow seas?

• Low predator presence

• Warm water temperatures

• Nutrient upwelling

• Abundant sunlight

How does El Niño affect the fishing industry?

• Increases fish population

• Enhances nutrient upwelling

• Causes fish to migrate to colder waters

• Suppresses upwelling, reducing fish availability

What are the primary producers in marine food webs?

• Zooplankton

• Phytoplankton

• Coral reefs

• Seaweed

Which fishing method involves dragging metal baskets across the sea floor?

• Dredging

• Gill netting

• Long lining

• Trawling

What is a major disadvantage of using gill nets?

• Low catch efficiency

• Bycatch of unintended species

• Requires deep water

• High cost

What is the term for the highest amount of fish that can be caught without depleting the stock?

• Sustainable catch limit

• Fishing quota

• Carrying capacity

• Maximum sustainable yield

What percentage of the world market for fish does aquaculture currently account for?

• 50%

• 90%

• 30%

• 70%

What is a significant environmental concern associated with aquaculture?

• Increased biodiversity

• Habitat destruction

• Reduced water pollution

• Overfishing

Which country produces the majority of farmed fish worldwide?

• United States

• India

• China

• Brazil

What was the main issue in the Cod Wars between Britain and Iceland?

• Fish species conservation

• Environmental regulations

• Trade tariffs

• Fishing rights