Overfishing is threatening more than 90 species in Europe with extinction. While fish farms were once tipped to help offset the effect of plummeting stocks, it turned out they can actually make matters worse.

Aquaculture, or fish farms, will soon surpass wild fisheries as the main source of seafood. In theory, they could help relieve the pressure on wild stocks, except that the food given to fish in farms, called aquafeed, is often dependent on smaller wild species, like anchovies and sardines, which, when overfished, sends shockwaves up the food chain.

Sustainability will be balanced between increasing demand and limited resources,' said Prof. Ivar Rønnestad.

Read the full article by Steve Gillman about sustainable fishing from the University of Cambridge