When was the scientific study that found that if current trends continue all fish stocks will collapse within fifty years published ?
A further study published in the scientific journal PLoS One ( Ecolabel conveys reliable information on fish stock health to seafood consumers ’ , Gutierrez et al. , 21 August 2012 ) found , following the first comprehensive analysis of global fish stocks targeted by MSC certified fisheries , that certified stocks are healthy and maintained above levels that ensure continuing sustainability .