AQA · Biology · 8461
GCSE Biology: Sustainable fisheries
Ecology · AQA GCSE Biology (8461), specification point 4.7.5.3. Cards are generated from the exam board's own specification for "Sustainable fisheries", and every card links back to the page it came from. Separate science only. Specification © AQA — used with attribution.
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What is happening to fish stocks in the world's oceans?
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They are declining.
Why must fish stocks be kept at a level where breeding continues?
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Otherwise certain species may disappear altogether in some areas.
Name one measure used to conserve fish stocks at a sustainable level.
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Controlling net size (or introducing fishing quotas).
How does controlling net (mesh) size help conserve fish stocks?
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Larger mesh lets young, small fish escape so they can grow and breed before being caught.
How do fishing quotas help conserve fish stocks?
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They limit the number or mass of fish that can be caught, so enough fish remain to breed and the stock can recover.
What does 'sustainable' mean when applied to fisheries?
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Fishing at a level where enough fish are left to breed, so stocks are maintained for the future.
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