CHARACTERISTICS OF SPAWNING NESTS OF COLUMBIA RIVER SALMON 



109 



70 



60 



50 



40 



30 



20 



10 





 20 



10 

 



BLUEBACK 



141 REDDS 



CHUH 



66 REDDS 



(A 



O 



I 



SILVER 



65 REDDS 



8 9 



II 12 13 14 19 16 17 18 19 20 



SIZE OF REDDS IN SQUARE YARDS 

 Figure 7. — Size frequency distribution of salmon redds from all streams combined. 



