Us scientists found steelhead trout reared in hatcheries were much less good at reproducing than wild fish 美国科学家发现在孵卵所的虹鳟其繁殖能力远不如野生种野生鱼类
3.
A steelhead is a rainbow trout which migrates into the seas and then they come back up the streams and they re caught in the streams 钢头就是移居到海洋的虹鳟。当它们回到河溪就在那儿被捉了。
4.
And i bought it hook , line and sinker . but then i also caught the fish hook , line and sinker . a beautiful 10 pound , steelhead rainbow trout 线铅锤，然后我用这些工具，钓到一条美丽的十磅重的钢头虹鳟。
5.
Steelhead populations in rivers along the us west coast are listed as threatened or endangered by the us fish and wildlife service 美国西海岸河流的虹鳟族群被美国渔业局和野生生命部门列为受到威胁和遭到危险的族群。
6.
The oregon state team had previously shown that first - generation captive - reared steelhead were just as successful reproductively as their wild - reared relatives , producing just as many young 奥勒冈州的团队先前证明了第一代人工养殖的虹鳟与野生虹鳟一般，产下后代的数量相当。
