RECIFE, Brazil (Reuters) - Fishing nations agreed on Sunday to cut by about a third the quota for Atlantic bluefin tuna, a giant fish prized by sushi lovers, numbers of which have been decimated by commercial catches.
The move was denounced as inadequate by environmental groups who had called on the International Commission for the Conservation of Atlantic Tunas (ICCAT) to agree to a zero quota and list the fish as an endangered species.
ICCAT, an intergovernmental body of 48 nations that environmentalists say has consistently failed to protect bluefin, said the annual quota for bluefin next year would be 13,500 tonnes, down from 19,950 tonnes.
"I think it's quite an achievement and in full conformity with the scientific advice," ICCAT chairman Fabio Hazin told Reuters after a week-long meeting in Recife, northeastern Brazil.
He said the cut and further measures agreed upon on Sunday -- including a cut in the tuna-fishing season to one month and a recovery plan -- gave a 60 percent probability that the bluefin stock would recover in 15 years.
ICCAT's scientists said last month bluefin catches must drop to below 15,000 tonnes a year to stabilize their numbers and start a recovery that would one day allow sustainable catches of around 50,000 tonnes a year.
Environmental groups said a quota of 8,000 tonnes was needed to give a 50 percent chance of a revival in stocks.
"It's too little, too late," said Susan Lieberman, director of international policy for the Washington-based Pew Environment Group. "It is a decrease and that's nice, but it's not going to recover the species."
Fishing nations in the European Union including Spain, Italy, France, Cyprus, Greece and Malta have consistently opposed sharper quota cuts.
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ICCAT also agreed to ban fisherman from taking big-eye thresher sharks, one of several shark species endangered by overfishing. Fisherman had previously been allowed to take the sharks if they came up dead in nets, but under the new rule will not be able to use them at all, said Matt Rand, head of the Pew Environment Group's shark conservation campaign.