Tabl« 1.— Spawning ground surveys, Okanogan River, 1957 



Table 2. — "Factor 5" estimates of Okanogan spawning population, 1957 



Section 



E-H 



H-K 



K-M 



Survey 

 date y 



10/1 

 10/8 

 10/15 

 10/22 



10/1 

 10/8 

 10/15 

 10/22 



10/1 

 10/8 

 10/15 

 10/22 



10/1 

 10/8 

 10/15 

 10/22 



10/1 

 10/8 

 10/15 

 10/22 



10/1 

 10/8 

 10/15 

 10/22 



10/1 

 10/8 



10/15 

 10/22 



Count 



155 



285 



221 



48 



491 

 1773 



1212 



463 



923 

 1879 

 1343 



320 



530 

 570 



1286 

 31*3 



759 

 2803 

 1551 



436 



299 

 1179 

 1076 



248 



50 



10 



30 







Average 



Am. 



177 



985 



1116 



682 



1387 



701 



22 



885 



4925 



5580 



3410 



6935 



3505 



110 



Estiaate : 



25,350 



1/ The Survey of 9/25 wa* ellninated since spawning was not actually 

 in progress. 



