Marine Trophic Index [BIP]
Marine Trophic Index [BIP]
Indicator description
Fish currently supply the greatest percentage of the world’s protein consumed by humans. However, most of the world’s fisheries are being fished at levels above their maximum sustainable yield and many regions are severely overfished. The Marine Trophic Index measures the mean trophic level for all Large Marine Ecosystems and hence indicates the extent of ‘fishing down the food webs’. This provides a measure of whether fish stocks, especially of large bodied fish, are being overexploited and fisheries are being sustainably managed.