Since 1964, the Mokelumne River Fish Hatchery in California has supplied the watershed with four to 10 million juvenile Chinook salmon each year. The hatchery began the practice as a way of countering the effects of dams that block migration and making sure that the salmon population remained viable. But recent research shows that the massive influx of hatchery-raised fish is masking the fact that wild fish populations are not holding up.
- Hatchery fish mask the decline of wild salmon populations (physorg.com)
- Snider Creek steelhead hatchery program ends next year to enhance wild steelhead zone (seattletimes.nwsource.com)
- Evolution at warp speed: Hatcheries change salmon genetics after a single generation (yubanet.com)
- Hatcheries Change Salmon Genetics After A Single Generation: Evolution At Warp Speed (spiritandanimal.wordpress.com)