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Marine ecosystem

I read an article about a research predicting that sharks will go extinct in a few year, and this will make the whole marine ecosystem unstable. How will this affect our lives? We may have less fish to eat, OK, but will humans be hurt by this in more ways?


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We can only fool with Mother Nature for so long without harming ourselves.  Even supposing that sharks have no redeeming value in themselves, causing their extinction can easily affect animals that do have value to us:

"When marine biologists used complex computer programmes to predict the consequences of the removal of the tiger shark from the Hawaiian Reefs they witnessed the increase in the number of reef sharks, turtles, bottom fish and seabirds.

What they didn't expect to see was the 'total and rapid crash in the abundance of tuna and jacks'.  This was explained by the proliferation of seabirds - prey to the tiger shark - but predator to the tuna and jacks."  (Bite Back -- Sharks: Frequently Asked Questions)


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Hii Mafrum

Just to add to Fiona's answer:

There are about 60 genus and 350 species of sharks, in all seas and a wide variety of depth. All the sharks , from the smallest to the largest, are predators. They eat all the sea creatures (Most of them are, even, cannibals) - :fishes,crabs,molluscs and sea-mammals.

So, - even if they would extinct (all of them ??) It Would not change very much the ecosystem, because thier "food" would have now more animals to eat themselves, they will increase in number, and make a new equilibrium in their environment. The lump sum of the fishes that the world use as food will not change much.


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