Not Enough Fish in the Sea
Overfishing means catching fish faster than they can reproduce. Overfishing pushes the fish population lower and lower, until fish are so few that fishermen can't make a living any more. Many fisheries have already collapsed.
In the second half of the 20th century, ocean fishermen increased their catch 400% by doubling the number of boats and using more effective fishing gear. In 1989, the world's catch leveled off at just over 82 million metric tons of fish per year, which is all the ocean can produce.
Overfishing affects the marine ecosystems in which species are embedded. Scientists warn that this will result in profound changes in our oceans, perhaps changing them forever. (Source: Greenpeace, Monterey Bay Aquarium.)
The graphic below illustrates the current status (as of 2001) of fish stocks. For a graphic illustrating the effects of overfishing, see here. And for one showing the challenge of rebuilding depleted fish stocks, see here.
Back to The Last Days of the Ocean project index
Back to Julia Whitty's feature story, "The Fate of the Ocean"
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