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Category – Fish and wildlife

Fish And Warm Water Don't Mix

June 20, 2016
John Harrison

None

Fish managers and dam operators in the Columbia River Basin are ready to respond if water temperatures rise to lethal levels, as they did in the summer of 2015.

Culling Cormorants May Not Help Fish Survival

May 20, 2016
John Harrison

None

A preliminary analysis by a U.S. Department of Fish and Wildlife scientist suggests no effect on the survival of Snake River steelhead.

Sea Lions Feast on Salmon and Steelhead at Bonneville Dam

May 19, 2016
John Harrison

None

Fish kills peak in the first week of May, then decline. More than 50 of the most aggressive hunters have been permanently removed.

Cold-Water Hangouts in a Hot River

May 11, 2016
John Harrison

None

Water scientists are searching the Columbia River Basin for the cold-water places where salmon can rest when the water temperature goes lethal.

Hatcheries and Wild Salmon: Results From Nearly 30 Years of Study

May 10, 2016
John Harrison

None

Researchers in Idaho find hatcheries can help stabilize a declining salmon population, but not permanently.

Chinook run increases, and so do sea lions

May 03, 2016
John Harrison

None

The U.S. Army Corps of Engineers reports that so far this year sea lions are killing more spring salmon than the 10-year average.

Hot River, Dead Salmon, Lessons Learned

April 15, 2016
John Harrison

None

The summer of 2015 turned brutally hot for salmon in the Columbia River. Dam and fish managers report on how last year's experience will help them prepare for future temperature emergencies.

The Mystery of Swan Lake

April 13, 2016
John Harrison

None

Chemical sleuthing aims to find out where unwanted walleye came from.

A boost for northern pike removal

April 13, 2016
John Harrison

None

Like a bad guy from the old West, northern pike are wanted: Dead

Wild fish: Some frustration, some optimism

April 06, 2016
John Harrison

None

Northwest state fish managers are both frustrated and optimistic about wild fish returns to the Columbia River. It depends on the species.

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