Thursday December 4, 2025
Active NorCal —
Thousands of fall run Chinook salmon pushed beneath the Golden Gate Bridge and into the Sacramento River system this fall, and a small group of them carried tiny tracking tags that allowed scientists to follow their journey in real time.
The project, led by NOAA Fisheries and UC Santa Cruz, tagged about 100 adult salmon to better understand how the fish navigate the Sacramento San Joaquin Delta and how many ultimately reach their spawning grounds more than 200 miles upriver. The tags pinged monitoring stations as the salmon moved, giving researchers a clearer picture of migration timing, survival, and the challenges the fish face.