It doesn't take long for that sort of hunting practice to bring the populations crashing down.

这种狩猎活动很快就会使鸟类的数量剧减。

And that's going to actually lead to a very steep population crash in many ways.

这实际上会在很多方面导致非常急剧的人口崩溃。

Italy is expected to see an equally dramatic population crash from 61 million to 28 million over the same timeframe.

预计意大利将在同一时间段内看到同样戏剧性的人口从6100万暴跌至2800万。

Recently, you know, within the last 15 to 20 years, they have started to be fished for Asian tonics, and as a result of this, we've seen manta populations crashing across the globe.

最近，你知道，在过去的15到20年里，他们因为被当做亚洲人补药而被捕杀，因此，我们看到了蝠鲼数量在全球范围内的锐减。