A chemical found in nearly all tires is responsible for mass die-offs of salmon along the U.S. West Coast, according to a study published in the journal Science.

As Elliot Johnson of Alaska Department of Fish and Game explains in the video, the Childs Glacier monitoring station is responsible for counting the returning salmon as they complete their ocean migration back to their native spawning...

Bill Webber and Bill Bailey are two longtime residents of Cordova, Alaska, whose livelihoods, and way of life revolve around the fishing industry. As we see in the video, both Webber, a third generation Alaskan fisherman, and Bailey, one...

MS PAN Coho salmon spawning in Horsefly river / Horsefly, British Columbia, Canada

CU ZO Two Coho salmon swimming in Horsefly river / Horsefly, British Columbia, Canada

CU ZI PAN Coho salmons spawning in Horsefly river / Horsefly, British Columbia, Canada

WS TD School of Coho salmon spawning in Horsefly river / Horsefly, British Columbia, Canada

WS TU Coho salmons spawning in Horsefly river / Horsefly, British Columbia, Canada

MS ZI PAN Coho salmons spawning in Horsefly river / Horsefly, British Columbia, Canada

MS ZO Two Coho salmon swimming in Horsefly river / Horsefly, British Columbia, Canada

CU Coho salmon swimming in Horsefly river / Horsefly, British Columbia, Canada

CU Coho salmon spawning in Horsefly river / Horsefly, British Columbia, Canada

MS ZI School of Coho salmon spawning in Horsefly river / Horsefly, British Columbia, Canada

A Coho Salmon struggles upstream to spawn. During the first winter rains, the spawning fish swim 33 miles from the open ocean to lay their eggs and die.

Salmon swimming upstream for spawning.

MS PAN ZI School of Coho salmon spawning in Horsefly river / Horsefly, British Columbia, Canada