The long-term concern is that fishing is intended to be selective; fishermen aim to harvest the most profitable species and the most profitable sizes within species. Like all other forms of life, fish stocks change genetically when directional selection is applied.
我们长期关注的问题是捕渔应该具有选择性。渔民的目的在于收获利润最大的鱼种和该鱼种中利润最大的个体。和其他生命群一样，当我们有目的地对其进行人工选择时，鱼群生长会发生基因上的改变。过度捕捞给基因带来的后果是鱼群的增长速度减慢，个体的成熟期缩短。