Since they have no time to reproduce. 因为他们没有时间繁殖

15. Three-quarters of fishing grounds are exhausted,
    四分之三的捕捞海域枯竭
16. Depleted or in danger of being so.
    已经枯竭或将要枯竭
17. Most large fish have been fished out of existence,
    大多数大鱼已经被捞光
18. Since they have no time to reproduce.
    因为他们没有时间繁殖
19. We are destroying the cycle of a life that was given to us.
    我们正在摧毁赐予我们的生命轮回
20. On the coastlines, signs of the exhaustion of stocks abound.
    海岸线边 充斥种群灭绝的迹象
21. Colonies of sea mammals are getting smaller.
    海洋哺乳动物栖息地正在变小

来自《家园 第二部分 Home Part2》第 18 行