At their best, they can only replace 6% of their population each year, while shallow-water fish like cod, mackerel, and herring replace half of their entire population in the same time — assuming we don't fish them.
它们最多每年可以更替自身数量的百分之六,然而浅水鱼,如鳕鱼、马鲛鱼和青鱼,它们用相同的时间可以替换自身将近
半的数量——假设我们没捕鱼。