I am writing a paper that compares smolt/adult values for Chinook salmon in Redwood Cr (Humboldt Co., CA) in two recent drought years. Our smolt/adult values decreased considerably when adults could not reach the mid/upper basin. I used two DIDSON sonars (one in upper basin, one in lower basin), and 3 smolt traps. I would like to reference others who have determined smolt/adult values in other streams.