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Shark Conservation. Why are We Worried? By 2017 it is anticipated that 20 species of shark could be extinct.

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Presentation on theme: "Shark Conservation. Why are We Worried? By 2017 it is anticipated that 20 species of shark could be extinct."— Presentation transcript:

1 Shark Conservation

2 Why are We Worried? By 2017 it is anticipated that 20 species of shark could be extinct

3 Why Are We Worried 100 million sharks are taken from the seas each year –due to hunting and by-catch

4 Why Are We Worried Sharks are long-lived (some live to 70), take a long time to reproduce, long gestation times Sharks are removed from the ocean before they can be replaced

5 Threats to Sharks Fishing for sharks- intentional and bycatch Finning- fins are cut off shark and the carcass is thrown into the water Medicinal use of shark cartilage to treat some cancers or reduce tumor growth Habitat degradation- pollution –Shark nurseries are nearshore, estuaries, mangrove forests, and rivers

6 Why Protect Sharks? Keeping ocean ecosystems in balance –top predators play a critical role in ocean ecosystems –hunt older, weaker or sick prey, keeps the prey population in good condition

7 For example, removal of tiger sharks from a tropical ecosystem resulted in a decline in tuna the tuna declined because the tiger sharks had been keeping other tuna predators in check.

8 back.com/sharks/endangeredsharks.html


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