Discovery Channel

Sharks in danger

Overfishing

Blue shark (DCI, NHPA )
Overfishing

Like hundreds of other fish species, sharks are under increasing pressure from the global fishing industry. As stocks of edible fish decline all over the world, many fishing fleets are turning to sharks as an alternative food source, with potentially catastrophic effects, not just on shark populations, but on the marine ecosystem too.

Shark populations take a long time to recover from overfishing. They grow very slowly and take a long time to reach sexual maturity – 20 years or more in some species. When they do reproduce, they produce very few offspring compared to other food fish species. These factors have already endangered several species of shark, particularly in coastal areas with large populations to feed, such as the North Atlantic coast of America.

The decline in the number of sharks has serious consequences for the ecosystems in which they live. Sharks are a vital part of the food chain, and their predatory nature helps to keep populations of their prey species in check. Without sharks to help maintain a healthy balance, marine environments are at great risk of permanent damage.

Photo: DCL
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