Dating the emergence of pandemic influenza viruses

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With so little of the ocean closed to fisheries - less than 1% - it's hardly shocking that many seabirds are suffering from overfishing.Hammill said the "most pressing issue" is plastic pollution.The decline since 1996 has largely been in fish caught by industrial fleets and to a lesser extent a cut in the number of unwanted fish discarded at sea.

Seabirds continually mistake plastic for fish eggs, devouring large amounts."Because if we rebuild stocks, we can rebuild to more than we thought before." There has been success in some places where fishing has been restricted for a few years, for example in the Norwegian herring and cod fisheries. Pauly said: "I don't see African countries, for example, rebuilding their stocks, or being allowed to by the foreign fleets that are working there, because the pressure to continue to fish is very strong.We know how to fix this problem but whether we do it or not depends on conditions that are difficult." A 2015 study showed nearly 500 Chinese fishing vessels operating off west Africa, with scores of cases of illegal fishing, according to Greenpeace.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.Official catch data from FAO rarely includes small-scale, sport or illegal fishing and does not count fish discarded at sea.

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