If you had to design a way to guarantee the decimation of a breeding population, this would be it: catch the fish before they are old enough to breed and keep them penned up until they are killed.

• 如果要设计一种保证可以摧毁繁殖族群的方法，就是把还没成熟到可以繁殖的鱼捉起来，养在围栏中，直到可以宰杀为止。