Survey of piscivorous birds of the Nechako and Stuart Rivers, B.C. / by T.G. Brown, L. Rzen, and E. White. : Fs97-4/2285E-PDF

"Counts and observations of birds within the Nechako and Stuart rivers were made as part of the Department of Fisheries and Oceans commitment to examine the potential impacts of reduced flows and altered temperatures on predation of juvenile chinook salmon (Oncorhynchus tshawytscha) prior to water diversion. Birds were observed and counted from a drifting boat on 4 surveys of 241 km of river. These 4 surveys were completed between May and October 1991, prior to completion of Kemano II, a water diversion project. A simple feeding model that incorporated information from the relevant literature, actual field counts and observations of birds, and fish prey distribution from earlier studies was developed to rank the potential impact of each bird species on juvenile chinook salmon. …"--Abstract, page v.

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