445 



FACTORS INFLUENCING THE RETURN 

 OF FALL CHINOOK SALMON 

 (Oncorhynchus tshawytscha) 

 TO SPRING CREEK HATCHERY 



SPECIAL SaENTIFIC REPORT-FISHERIES Na 445 



fi^larine Biological Laboratory 



Ul BRARY 



JAN 2 J1964 

 WOODS HOLE, MASS. 



UNITED STATES DEPARTMENTJ0F_J;HE_^^ 



FISH AND WILDLIFE SERVICE 



