CONCLUSIONS AND RECOMMENDATIONS 



The operation of the electrical installation 

 at the Tamarack Falls site permits the follow- 

 ing conclusions and recommendations: (1) the 

 electrical fields of the electrode array were 

 effective in diverting adult squawfish into traps; 

 (Z) the work reported here was an attempt to 

 determine the problems of operation of our 

 equipment and evaluate its effectiveness under 

 field conditions. 



For future application of this technique, 

 attention should be given to the following: 



1. The velocities and volumes of water to 

 be expected at the site of operation of 

 the installation. 



2. Replacement of parts or sections of the 

 electrode array and traps. 



3. Power equipment to enable rapid removal 

 of large numbers of fish. 



4. Upstream barrier to collect large pieces 

 of debris. 



5. Disposal of squawfish and other unde- 

 sirable fish removed from traps. 



ACKNOWLEDGMENTS 



Funds for this study were provided jointly 

 by the Idaho Department of Fish and Game and 

 the Columbia River Program Office, Bureau 



of Comnnercial Fisheries. Robert H. Lander 

 helped plan and analyze the field tests. Kenneth 

 L.. Liscom, Charles C. Gillaspie, and field 

 personnel of the Idaho Department of Fish 

 and Game assisted in the field work at Cas- 

 cade Reservoir, Idaho. We also thank James E. 

 Mason for his suggestions on the installation. 



LITERATURE CITED 



JEPPSON, PAUL. 



1957. The control of squawfish by use of 

 dynamite, spot treatment, and reduc- 

 tion of lake levels. Progr. Fish-Cult. 

 19: 168-171. 

 LINDSEY, C. C. 



1956. Distribution and taxonomy of fishes 

 in the Mackenzie drainage in British 

 Columbia. J. Fish. Res. Board Can. 

 13: 759-789. 

 MAXFIELD, GALEN H., KENNETH L. LIS- 

 COM, and ROBERT H. LANDER, 

 1959. Leading adult squawfish ( Ptychoche- 

 ilus oregonensis) within an electric 

 field. U.S. Fish Wildl. Serv., Spec. 

 Sci. Rep. Fish. 298, iv + 15 pp. 

 VOLZ, CHARLES D. 



1962. Ignitron-pulsed electric fence guides 

 migrating salnaon. Electronics 35(16): 

 50-52. 



MS. # 1809 



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