Chinook Salmon Fishing in the San Juan Islands
I just ran across this revealing study on Chinook Salmon populations in the Puget Sound and San Juan Islands. This was the best nugget of information I found in the report:
Puget Sound Chinook salmon have shown a pattern of declines in survival since the 1980s. At least half of Puget Sound Chinook populations are influenced by hatcheries, and hatchery Chinook smolt-to-adult survival has been around 1% in recent years. That means that for every 100 young salmon that leave the river, only 1 returns to spawn.
The report also has graphs showing the decline of hatchery Chinook Salmon populations from the 1970′s to the present.