Environmental security

Ocean fish numbers on 'brink of collapse,' WWF reports

The amount of fish in the oceans has halved since 1970, in a plunge to the "brink of collapse" caused by over-fishing and other threats, the WWF conservation group said on Wednesday.

Populations of some commercial fish stocks, such as a group including tuna, mackerel and bonito, had fallen by almost 75 per cent, according to a study by the WWF and the Zoological Society of London (ZSL).

Marco Lambertini, director general of WWF International, told Reuters mismanagement was pushing "the ocean to the brink of collapse".