“This image shows the biomass of popularly-eaten fish in the North Atlantic Ocean in 1900 and in 2000. Popularly eaten fish include: bluefin tuna, cod, haddock, hake, halibut, herring, mackerel, pollock, salmon, sea trout, striped bass, sturgeon, turbot. Many of which are now vulnerable or endangered. Dr. Villy Christensen and his colleagues at the University of British Columbia used ecosystem models, underwater terrain maps, fish catch records, and statistical analysis to render the biomass of Atlantic fish at various points this century.”
From The DataBlog, UK Guardian, Design by David McCandless, Map Render: Gregor Aisch http://www.guardian.co.uk/news/datablog/2011/jun/03/fish-stocks-information-beautiful#zoomed-picture
Source and Data: “Hundred year decline of North Atlantic predatory fishes,” V Christensen, et al, 2003. This paper has some good maps on the interstitial years between 1900 and 2000, as well: http://www2.fisheries.com/archive/members/dpauly/journalarticles/2003/hundredyeardeclinenorthatlanticfishes.pdf