Lesson 4.7.5.3

4.7.5.3 Sustainable fisheries Quiz: AQA Biology, Unit 7

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 4.7.5.3, Sustainable fisheries: 20 multiple choice questions for the AQA GCSE Biology (8461), Unit 7: Ecology, written with Revision Ninja.

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The 20 questions

  1. What is currently happening to global fish stocks in the oceans?

    • Increasing
    • Staying constant
    • Fluctuating wildly
    • Declining

  2. At what minimum level must wild fish stocks be maintained?

    • Below adult survival
    • At maximum capacity
    • At zero population
    • Where breeding continues

  3. Besides controlling net size, which measure is used to conserve fish stocks?

    • Fishing quotas
    • Culling predators
    • Fish farming
    • Artificial reefs

  4. What is the definition of a fishing quota?

    • Price floor
    • Mesh size limit
    • Vessel length limit
    • Catch limit

  5. What can happen to a fish species in an area if it is overfished?

    • Increase breeding
    • Multiply rapidly
    • Disappear completely
    • Evolve faster

  6. Why is controlling net mesh size important in fisheries conservation?

    • Allows juvenile escape
    • Reduces ocean pollution
    • Traps smaller predators
    • Increases total catch

  7. What is the main biological goal of using sustainable fishing techniques?

    • Stock recovery
    • Eliminating predators
    • Maximising yield
    • Faster harvesting

  8. Which term describes fishing at a rate that keeps stocks able to recover?

    • Unrestricted trawling
    • Intensive fishing
    • Sustainable fishing
    • Commercial overfishing

  9. Setting a fishing quota below current catch limits directly supports what?

    • Higher fish mortality
    • Local extinction
    • Increased pollution
    • Breeding and recovery

  10. Which change to a fishing net allows young fish to escape?

    • Longer net length
    • Thicker net cords
    • Smaller mesh size
    • Larger mesh size

  11. How does protecting breeding adult fish help restore fish stocks?

    • Reduces egg counts
    • Causes sudden collapse
    • Maintains reproduction
    • Increases competition

  12. Banning fishing in a specific breeding area is an example of what?

    • Genetic modification
    • Conservation measure
    • Commercial farming
    • Selective culling

  13. Which measure best helps a declining wild fish population to recover?

    • Strict catch quotas
    • Unrestricted fishing
    • Increased boat numbers
    • Smaller net meshes

  14. If a fish population drops to dangerously low levels, what action is needed?

    • Increase boat numbers
    • Reduce catch quotas
    • Reduce mesh size
    • Ban natural predators

  15. Fishing quotas are primarily used to protect which type of fish population?

    • Aquarium stocks
    • Wild stocks
    • Hatchery stocks
    • Farmed stocks

  16. Which two key conservation methods are used for sustainable fisheries?

    • Quotas and net size
    • Desalination and warming
    • Trawling and dredging
    • Feed ban and antibiotics

  17. Which measure directly limits the mass of fish that boats are allowed to catch?

    • Fishing quotas
    • Net mesh size
    • Fertiliser limits
    • Selective breeding

  18. Why is it essential to maintain fish stocks above a minimum level?

    • To clear waste
    • To increase size
    • So breeding continues
    • To reduce pollution

  19. How does increasing the mesh size of fishing nets help conserve fish stocks?

    • More fish caught
    • Breeding stops completely
    • Young fish escape
    • Nets grow stronger

  20. A stock of 4,000 fish must recover to 10,000. If it grows by 500 fish a year with no fishing, how many years are needed?

    • 20 years
    • 12 years
    • 8 years
    • 10 years

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