美国政府宣布蛇河的红大马哈鱼有濒临灭绝的危险。这意味着该品种将受到联邦法律的保护。成千上万红大马哈鱼过去每年从太平洋上溯哥伦比亚河至蛇河,然后进入红鱼湖爱达荷州的小溪产卵。近几年,上溯蛇河的红大马哈鱼的数量日益减少。到1990年,鱼都不见了。1991年,发现有四条鱼上溯,一雌、三雄。科学家说,蛇河红大马哈鱼的将来系于这条雌鱼。他们计划靠她来繁殖后代。该鱼 The U.S. government has declared the Redfish of the Snake River dangerously endangered. This means that the breed will be protected by federal law. Thousands of red salmon past each year from the Pacific up the Columbia River to the Snake River, and then enter the red fish Lake Idaho spawning. In recent years, the number of red salmon on the Snake River has been declining. By 1990, the fish are gone. In 1991, four fish were found upstream, one female and three male. Scientists say the future of the Snake Red salmon lies on the female. They plan to breed offspring with her. The fish