As salmon and steelhead swim upstream, they’re now facing one more challenge in fish ladders. It’s a non-native fish competing for space: the American shad. At Lower Granite Dam on the Lower Snake ...

Adult fall-run Chinook salmon congregate near the Nimbus Hatchery Fish Ladder on the American River in Sacramento County in this October 2012 file photo. (Photo by Carl Costas/California Department of ...

BONNEVILLE DAM — The U.S. Army Corps of Engineers is gutting and rebuilding a large section of Bonneville Dam’s fish ladder to make it easier for Pacific lamprey to pass the dam as they return from ...

A B.C. conservation group says it is concerned salmon returns will continue to decline as the federal government cuts funding ...

Add Yahoo as a preferred source to see more of our stories on Google. A chinook salmon jumps upstream in Alameda Creek in November while migrating for spawning. Some salmon have swum further up the ...

As soon as it rains, coho salmon likely will swim up a small creek to a spawning ground in the west Sonoma County hills that has been impassable to the species for decades. When they come to the ...

BONNEVILLE DAM, Columbia River, Wash. — There is a new king of the Columbia. Each spring, a chrome tide of fish native to the East Coast floods the Northwest’s mightiest river by the millions. Shad, ...

For years, Seattle City Light insisted its hydroelectric dams on the Skagit River were not harming salmon.

Courtesy of Matt Mais / Yurok Tribe Chinook salmon are spawning in streams above four former dam sites on the Klamath River in numbers that are astounding biologists. Now, a network of tribes, ...