7.5.3 Sustainable Fisheries
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Why is the number of fish in the oceans decreasing?
Because humans are fishing at a faster rate than fish populations can regenerate.
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Why must fish populations stay above a certain level?
So breeding can continue and species do not disappear from some areas.
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What are two restrictions used to maintain sustainable fisheries?
Net size limits and fishing quotas.
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How do net size limits help sustainability?
They stop smaller fish being caught so they can reach breeding age and produce more fish.
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How do fishing quotas help sustainability?
They limit the number of a species of fish that can be caught in an area and time period to prevent overfishing.
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