suggested electrical conditions. The following 

 physical conditions at the entrance to Drano 

 Lake, or other field site, should be surveyed 

 and taken into account: (1) range in water tem- 

 perature; (2) range in water resistivity; (3) fluc- 

 tuations in water depth; (4) water flow; (5) width 

 of channel; (6) bottom contour; and (7) depth at 

 which an electrical barrier would not interfere 

 with water traffic into Drano Lake from the 

 Columbia River. 



ACKNOWLEDGMENTS 



Paul D. Zimmer, Fishery Biologist (Manage- 

 ment), BCF Program Office, Portland, Oreg., 

 and hatchery personnel at the Bureau of Sport 

 Fisheries and Wildlife Little White Salmon 

 National Fishery Hatchery trapped the squaw- 

 fish used in the tests. Lauren R. Donaldson, 

 College of Fisheries, University of Washington, 

 made available to us three outdoor concrete 

 rearing ponds for holding the squawfish. 



LITERATURE CITED 



APPLEGATE, VERNON C„ PAUL T. MACY, 



and VIRGIL E. HARRIS. 



1954. Selected bibliography on applications 



of electricity in fishery science. U.S. 



Fish Wildl. Serv., Spec. Sci. Rep. Fish. 



127, 55 pp. 



CARL, G. CLIFFORD, and W. A. CLEMENS. 

 1948. The fresh- water fishes of British 

 Columbia. Brit. Columbia Prov. Mus., 

 Victoria, B. C, Handb. 5, 132 pp. 



FOERSTER, R. E. 



1937. Increasing the survival rate of young 

 sockeye salmon by removing predatory 

 fishes. Biol. Bd. Can., Progr. Rep. Pac. 

 Biol. Sta. 32: 21-22. 



1938. Predator control in relation to sock- 

 eye salmon conservation. Fish. Res. 

 Bd. Can., Progr. Rep. Pac. Biol. Sta. 

 36: 20-22. 



FOERSTER, R. E., and W. E. RICKER. 



1941. The effect of reduction of predaceous 

 fish on survival of young sockeye salmon 

 at Cultus Lake. J. Fish. Res. Bd. Can. 

 5: 315-336. 

 RICKER, W. E. 



1941. The consumption of young 

 salmon by predaceous fish. 

 Res. Bd. Can. 5: 293-313. 

 SNEDECOR, GEORGE W. 



1950. Statistical methods. Iowa State Col- 

 lege Press, Ames, Iowa, 4th ed., 485pp. 

 THOMPSON, RICHARD B. 



1959. Food of the squawfish Ptychocheilus 

 oregonensis (Richardson) of the lower 

 Columbia River. U.S. Fish Wildl. Serv., 

 Fish. Bull. 60: 43-58. 



M S. #2040 



sockeye 

 J. Fish. 



GPO B92.37I 



