United States Department of the Interior, Oscar L. Chapman, Secretary- 

 Fish and Wildlife Service, Albert M. Day, Director 



Special Scientific Reoort - Fisheries 

 No. $6 



SACRAMENTO - SAN JOAQUIN DELTA 

 FISHERY RESOURCES: Effects of Tracy 

 Pumping Plant and Delta Cross Channel 



By 



Leo F. Erkkila, James W. Moffett, Oliver B. Cope, 



Bernard R. Smith, and Reed S. Nielson 



Fishery Research Biologists 



CONTENTS 



Page 



Introduction 1 



Objectives .......... 5> 



Methods 7 



Biological Investigations . . 10 



King Salmon 12 



Spawning Migration 12 



Seaward Migration 13 



Discussion 20 



Striped Bass ............ 22 



Shad 31 



Water Flow in Relation to Fish Populations 3li 



Fish Protection „ I^o 



Summary Ii5 



Recommendations ........... 2^6 



References J^7 



Appendix £0 



