Ocean's fiercest predators now vulnerable to extinction

The numbers of many large shark species have declined by more than half due to increased demand for shark fins and meat, recreational shark fisheries, as well as tuna and swordfish fisheries, where millions of sharks are taken as bycatch each year. Now, the global status of large sharks has been assessed by the World Conservation Union, widely recognized as the most comprehensive, scientific-based information source on the threat status of plants and animals.

Sharks are disappearing from the world’s oceans. The numbers of many large shark species have declined by more than half due to increased demand for shark fins and meat, recreational shark fisheries, as well as tuna and swordfish fisheries, where millions of sharks are taken as bycatch each year.

Now, the global status of large sharks has been assessed by the World Conservation Union (IUCN), which is widely recognized as the most comprehensive, scientific-based information source on the threat status of plants and animals.

“As a result of high and mostly unrestricted fishing pressure, many sharks are now considered to be at risk of extinction,” explained Julia Baum, a member of the IUCN’s Shark Specialist Group who will be speaking at the American Association for the Advancement of Science (AAAS) Annual Conference in Boston, which runs from February 14 to 18. She will outline management measures required to conserve sharks at an afternoon press conference on February 17.

“Of particular concern is the scalloped hammerhead shark, an iconic coastal species, which will be listed on the 2008 IUCN Red List as globally ‘endangered’ due to overfishing and high demand for its valuable fins in the shark fin trade,” added Baum, who is an NSERC Postdoctoral Fellow at Scripps Institution of Oceanography.

Baum pointed out that fishing for sharks in international waters is unrestricted, and she supports a recently adopted United Nations resolution calling for immediate shark catch limits as well as a meaningful ban on shark finning (the practice of removing only a shark’s fins and dumping the still live but now helpless shark into the ocean to die).

Research at Dalhousie University over the past five years, conducted by Baum and the late Ransom Myers, demonstrated the magnitude of shark declines in the northwest Atlantic Ocean. All species the team looked at had declined by over 50 per cent since the early 1970s. For many large coastal shark species, the declines were much greater: tiger, scalloped hammerhead, bull and dusky shark populations have all plummeted by more than 95 per cent.

Source: Natural Sciences and Engineering Research Council


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Citation: Ocean's fiercest predators now vulnerable to extinction (2008, February 17) retrieved 23 July 2019 from https://phys.org/news/2008-02-ocean-fiercest-predators-vulnerable-extinction.html
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Feb 18, 2008
Maybe we can get rid of the other 50% of the dangerous ones
in the next 20 years. I believe in feeding people not predators.
These people have too much time on their hands. Go spend some
of it watching a mother watch her child die of starvation and then
tell me they are doing something worthwhile with their lives.

Mar 30, 2009
Your right bigwheel, saving an animal from extinction is such a stupid thing to do!! Get a clue will you! Wish everyone could hear about all the wonderful things you are doing to save these starving people? With the moronic comment I just read, my guess is NOTHING! These people deserve to be commended, they are making a difference in the world, whether you agree or not. You on the other hand are just a condesending idiot, he points fingers behind the obscurity of his computer. Get a grip buddy.

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