Sentences with phrase «coho populations»

But their crucial contribution to stream ecosystems may benefit the health of coho populations.»

But there's another challenge to producing a healthy and sustainable coho population.

Not exact matches

In a move that is certain to provoke a bitter battle in Congress, the US National Marine Fisheries Service has proposed listing three west coast populations of coho salmon as threatened.

Another benefit of Kamchatka's isolation is protection for populations of chum, sockeye, chinook, coho and pink salmon, which return by the millions to spawn in Kamchatka's rivers.

These processes completely altered the creek's alignment, flow, and connection to the floodplain — and affected its ability to support the southernmost continually - returning natural population of the endangered coho salmon in western United States.

The goal of the project — begun in 2009 and estimated to take four years to complete — is to make the creek a functional, self - sustaining ecosystem once again by realigning the creek; restoring wetlands, an intermittent tidal lagoon, and dunes; and also creating and maintaining habitat for sustainable populations of the endangered coho salmon and threatened steelhead trout.

Threatened or Endangered: Yes Population: Whereas in the 1940's, coho salmon in California were estimated to number between 200,000 and 500,000, today's population is estimated to have fallen to 1 percent of historic levels, and the coho of the Central California Coast are considered to be at high risk for extinction.

Range: Although their range spreads up to northern Alaska, the southernmost continually - returning natural population of endangered coho is found in Redwood Creek, and is recognized as a reproductively isolated and distinct population.

Legal protection: The National Marine Fisheries Service has identified seven distinct populations of coho, called Evolutionary Significant Units (ESUs), in Washington, Oregon and California.