In the Pacific Northwest, some tributaries salmon travel through to spawn are so hot that it’s threatening their migration. In some places, biologists have trucked the fish to cooler water.

This let us map their entire migration — the fact ... How could an anti-anxiety drug for humans boost salmon migration? The fish exposed to this medicine actually became faster at passing ...

However, modern salmon face a hurdle that was unknown to their ancient ancestors: pharmaceutical pollution that changes their migration behavior. Recently, researchers discovered that when a drug ...

Sockeye salmon making their way up the Columbia River to Canada begin to arrive in Washington state in late June, with the migration in full swing by the end of July. "They only have so much ...

Study reveals commonly detected environmental levels of clobazam -- a medication often prescribed for sleep disorders -- increased the river-to-sea migration success of juvenile salmon in the wild.