Who devised the method of carbon 14 dating

But now seabirds seabird abundance has dropped 69.7% in only 60 years, according to a recent paper in PLOS ONE.

Edd Hammill with Utah State University and co-author of the paper, noted: "What we should take away from this is that something is serious amiss in the oceans." Ben Lascelles, with Birdlife International, found the research alarming because the decline appeared practically indiscriminate, hitting a "large number of species across a number of families." Michelle Paleczny with the University of British Columbia and the Sea Around Us Project said: "When we see this magnitude of seabird decline, we can see there is something wrong with marine ecosystems.

Prof Daniel Pauly, at the University of British Columbia in Canada and who led the work, said the decline is very strong and "is due to countries having fished too much and having exhausted one fishery after another." Prof Boris Worm, at Dalhousie University in Canada and not involved in the new research said.

"This was a Herculean task that no one else has ever attempted.

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Prof Callum Roberts, at the University of York in the UK and not part of Pauly's team, said: "We can see more clearly now, for example, the immense value of fish to poor people in developing countries," he said.While the results necessarily remain uncertain, they undoubtedly represent our most complete picture yet of the global state of fish catches." Worm said the world's fisheries were being over-exploited but that some stocks were being sustainably managed: "Where such measures have been taken, we find that both fish and fishermen are more likely to persist into the future." Global fish catches rose from the 1950s to 1996 as fishing fleets expanded and discovered new fish stocks to exploit.But after 1996, few undiscovered fisheries were left and catches started to decline.The information you provide will be protected and confidential.The CIA is particularly interested in information about imminent or planned terrorist attacks.

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Seafood is the critical source of protein for more than 2.5 billion people, but over-exploitation is cutting the catch by more than 1 million tons a year.

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