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From the Summary:
The problem of predation of anadromous fish in the Sacramento River has been appraised as a part of the Central Valley Fish and Wildlife Management Study. Particular attention in this study was devoted to chinook salmon (Oncorhynchus tshawytscha) in the Upper Sacramento River from Keswick Dam to its confluence with the Feather River.
The study disclosed that...
Black and white slide ; 35 mm. Notes: Donor: Dorothy Hill Collection. Map with portion of the Sacramento River, base of the Sierra Nevadas, and Butte Creek shown. Slide Notes: "Capt. Warner's exploring party, August-October, 1849. Bancroft Library." Photograph Source: University of California, Berkeley-Bancroft Library Collection. :70