The Last Mitigation? During fall of 1992, a convoy of trucks swept into the University of California's Bodega Marine Station on the Sonoma County coast. Marked by a sign reading Shuttle for Survival;' the precious cargo consisted of 740 recently hatched Sacramento River winter-run chinook salmon (Oncorhynchus tshawytscha).1 The salmon were carefully groomed refugees, the offspring of twenty spawning chinook salmon, taken near Redding on the Sacramento River.2 This costly exercise, the brainchild of Nat Bing-