Tuna

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LONDON — The number of fish and other species in the sea has been almost halved since 1970, according to a new report from the World Wildlife Fund (WWF) and the Zoological Society of London (ZSL).

Numbers dropped some 49% between 1970 and 2012, the report says, with global population sizes of the Scombridae family of food fish that includes tunas, mackerel and bonitos falling by 74%.

The study, which hasn’t been peer reviewed, tracked 5,829 populations of 1,234 species, which its authors say makes up a data set almost twice as large as previous studies. Read more…

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Number of fish in the sea has dropped by nearly half since 1970, report says