I am interested in knowing how much emptier (ideally in either number of fish or kg of biomass) the ocean is due to direct and intentional human activity such as fishing or artificially controlling ocean animals populations. Are there currently any data regarding this? Soft estimates are fine.
The Census of Marine Life concluded in 2010 that 90 percent of the large fish are gone, primarily because of overfishing. This includes many of the fish we love to eat, like Atlantic salmon, tuna, halibut, swordfish, Atlantic cod. If we don’t allow for proper recovery, these fish risk total extinction.
Novogratz, A. and Velings, M. (2014). The end of fish. In the Washington Post. Retrieved on Dec 5, 2017.
The index for all utilized fish species indicates a 50 per cent reduction in population numbers globally between 1970 and 2010.
WWF International. (2015). Living Blue Planet Report. Retrieved Dec 6, 2017.
Most of Canada’s commercial fish stocks are depleted. Since 1970, an estimated 52 per cent* of their biomass has disappeared.
Oceana Canada. (2017). Oceana Fishery Audit 2017. Retrieved on December 5, 2017.