1940年至1959年间，过度捕捞导致鲑鱼数量锐减，以致于1953年阿拉斯加被指定为联邦灾区。
Between 1940 and 1959, overfishing led to crashes in salmon populations so severe that in 1953 Alaska was declared a federal disaster area.
像对鳕鱼和黑线鳕那样，法律没有限制对安康鱼的捕捞，这种情况导致了过度捕捞，从而导致了它们的枯竭。
There are no legal limits, as there are for cod and haddock, on the size of monkfish that can be caught, a circumstance that contributes to their depletion through overfishing.
例如，世界渔业的衰退便是由于过度的捕捞，因为主要食物来源的减少，也导致海鸟数量的急剧下降。
The collapse of the world's fisheries due to overfishing, for example, has devastated seabird populations that have lost their main food source.
另一个问题，尽管同样缺乏数据支持，却不容忽视，即过度捕捞和全球气候变暖导致海水温度和洋流改变，进而影响鲨鱼的行为。
Another question — but again, lacking sufficient data to answer it — is the impact on shark behavior from overfishing and from global warming, which affects ocean temperatures and currents.
三文鱼曾在这里大量繁殖，但由于多年的围坝、过度捕捞和生态环境的破坏，导致其数量减少。
Salmon once thrived here, but over the years DAMS, overfishing and habitat destruction have diminished their number.
栖息地环境恶化、水坝、水位下降、污染和过度捕捞等等多种组合威胁，已经导致了许多种鲶鱼的数量下降。
Multiple and combined threats from habitat degradation, DAMS, water withdrawals, pollution, and overexploitation have led to the decline of many catfish populations.
航空旅行、过度捕捞和全球持续变暖，这些都被看做是导致鲨鱼袭人事件不断增多的人为因素。
Air travel, overfishing and global warming are all seen as contributing to the uptick in shark attacks.
也有许多过度捕捞的例子已经导致原栖息地变成另一个类型。
There are also a number of examples of overfishing which have led to sudden changes where one habitat shifts to a different type.
也有许多过度捕捞的例子已经导致原栖息地变成另一个类型。
There are also a number of examples of overfishing which have led to sudden changes where one habitat shifts to a different type.
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