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Health of fish stocks by region

Fish stocks are measured by their biomass: the number of individuals multiplied by their mass.

Here it's measured as the biomass of a fish stock divided by the biomass at its maximum sustainable yield – the level at which we can catch the maximum amount of
fish without a decline in fish populations. A value of one maximises fish catch without decreasing fish populations.

AustraliaAustralia1970201819902000Indian Ocean tunasIndian Ocean tunas1970201819902000Pacific Ocean tunasPacific Ocean tunas1970201819902000Canada East CoastCanada East Coast1970201819902000JapanJapan1970201819902000South AmericaSouth America1970201819902000