Aggressive fishing has decimated jack mackerel stocks in the southern Pacific in the past two decades – from 30 million metric tons to less than 3 million.
Total stock biomass: The total weight of the fish in a stock, both juveniles and adults.
Spawning biomass: The total weight of the fish in a stock that are old enough to reproduce.
Source: South Pacific Regional Fisheries Management Organization
Graphic by Ajani Winston/iWatch News