Sentences with phrase «spawning grounds by»

Overfishing, pollution, and the blocking of spawning grounds by dams once devastated their populations.

Not exact matches

What is clear is that in coastal areas around the world, people have unwittingly created spawning grounds for huge numbers of jellyfish simply by building docks and other structures that quickly multiplying jellyfish polyps can attach to.

By the time Pacific salmon close in on their spawning grounds, they are senescent and naturally immunosuppressed.

Sockeye salmon that sprint to spawning grounds through fast - moving waters may be at risk, suggests new research by University of British Columbia scientists.

In 1978, through presidential proclamation, President Carter expanded Katmai National Monument by 1.3 million acres to protect «a viable gene pool population of the Alaska brown bear... headwaters of the drainages which provide the spawning grounds for red salmon... and the unique subsistence culture of the local residents.

Jimmy Carter In 1978, through presidential proclamation, President Carter expanded Katmai National Monument by 1.3 million acres to protect «a viable gene pool population of the Alaska brown bear... headwaters of the drainages which provide the spawning grounds for red salmon... and the unique subsistence culture of the local residents.