CONTENTS 



Paee 



Abstract ii 



Introduction 1 



Fishway capacity 6 



Fishway slope and fishway length 8 



Fish swimming abilities 10 



Attraction of fish 11 



Fishway hydraulics 11 



Effect of light on fish movement 12 



General observations 14 



Current research 15 



Appendix 16 



ABSTRACT 



Results of 4 years of research on fishway problems, data on rates of movement of 

 salmonids ascending fishways, and of spatial requirements of fish are given and experi- 

 ments to measure fishway capacity are described. The effect of fishway slope and 

 fishway length on fish performance and biochemical state were measured in "endless" 

 fishways. No evidence of fatigue was found when proper hydraulic conditions were 

 obtained. One salmon ascended over 6,600 feet vertically. Experiments to measure 

 swimming abilities of salmon indicated that the critical velocity was between 8 and 13 

 feet per second. Maximum observed swimming speed was 26.7 feet per second. 

 Preferences of salmonids for water velocities and light conditions revealed marked 

 differences between species. Effects of light and water velocity on rates of iiassage 

 through channels and fishways are described. Experiments involving fingerling 

 passage problems and the testing of fuUscale prototype fishway designs are illustrated. 

 Reports and publications on laboratory research are listed. 



