In the U.S., the Atlantic salmon is Federally endangered.

在美国，大西洋鲑鱼是联邦政府列出的濒危物种。

And their results when it comes to Atlantic salmon are mixed.

并且他们对于大西洋鲑鱼的研究结果很复杂。

Atlantic salmon are anadromous, which means they can live in saltwater and fresh water.

大西洋鲑鱼是溯河产卵动物，这意味着它们可以生活在咸水和淡水中。

Some experts say they're the biggest threat to the endangered Atlantic salmon.

一些专家称，大坝是濒危大西洋鲑鱼的最大威胁。

UNIDENTIFIED MALE: Over 200 years in the United States, there have been attempts made to maintain, restore and perpetuate the Atlantic salmon.

美国200多年来一直试图维持、恢复和延续大西洋鲑鱼。

Inside its 7,000 square metre main building are tanks capable of producing 8m smolt—juvenile Atlantic salmon—every year.

其 7,000 平方米的主建筑内设有水箱，每年可生产 800 万条小鲑鱼（大西洋鲑鱼幼鱼）。

Atlantic Sapphire, another Norwegian firm, has built an Atlantic salmon farm near Miami, a thousand miles south of the fish's natural range.

另一家挪威公司 Atlantic Sapphire 在迈阿密附近建造了一个大西洋鲑鱼养殖场，该养殖场位于鱼类自然分布范围以南 1000 英里处。