Revealing hungry salmon with sound waves

Testing of the SICA-system outside Norway. In contrast to the traditional method of underwater video cameras, this system was found to detect unusual behavior of salmon more effectively during the feeding process by identifying low feed intake earlier. Credit: Magnus Oshaug Pedersen In recent years, Norwegian aquaculture has put a lot of effort into aiming […]

Scientists solve mystery of mass coho salmon deaths. The killer? A chemical from car tires

Coho salmon, Tillamook State Forest, Oregon. Credit: Oregon Department of Forestry When officials in Seattle spent millions of dollars restoring the creeks along Puget Sound—tending to the vegetation, making the stream beds less muddy, building better homes for fish—they were thrilled to see coho salmon reappear. But when it rained, more than half, sometimes all, […]

Salmon are dying off and your car tires might be to blame

Scientists found that a number of coho salmon died while swimming through urban waterways in the Pacific Northwest. (CREDIT: John R. McMillan, NOAA Fisheries/NWFSC/) Every fall, coho salmon undertake an epic journey from the ocean back to the freshwater streams and creeks where they were born so they can reproduce and then die shortly after. […]

North America’s biggest salmon run may no longer be in danger

Sockeye salmon migrating up a riffle. (Jonny Armstrong /) This story originally featured on Outdoor Life. Last Wednesday the U.S. Army Corps of Engineers announced its rejection of the Pebble Limited Partnership’s permit application to develop a copper-molybdenum-gold mine in southwest Alaska. The proposed project would have been located 200 miles southwest of Anchorage, near […]

Early-arriving endangered Chinook salmon take the brunt of sea lion predation

A sea lion devours a salmon. Credit: LE Baskow The Columbia River is home to one of the West Coast’s most important Chinook salmon runs. Through late spring and early summer, mature fish return from the sea and begin their arduous journey upriver to spawn. In recent years, these fish have faced an additional challenge: […]

Early-arriving endangered Chinook salmon take the brunt of sea lion predation

IMAGE: A sea lion devours a salmon. view more  Credit: LE Baskow The Columbia River is home to one of the West Coast’s most important Chinook salmon runs. Through late spring and early summer, mature fish return from the sea and begin their arduous journey upriver to spawn. In recent years, these fish have faced an […]