CHINOOK SALMON MARKING, COLUMBIA RIVER 



243 



Table 22. — Chinook salmon marked at Bonneville hatchery during the fall of 1921, when approximately 

 IS months old, and recovered during the seasons of 1924, 1926, and 19S6 



Date of capture 



1924: 



May 6,. 

 May 17. 

 May 14- 



May 2... 

 May 3--. 

 May 4.. 



Do.. 



Do.. 



Do.. 



Do.. 



Do.. 



Do.. 



Do.. 

 May 5_. 



Do.. 



Do.. 

 May 6.- 



Do.. 



Do.. 

 Mays.. 



Do.. 

 May 11- 

 May 12. 

 May 16- 

 May 29- 



Do.. 

 Jane 2. . 

 June 18. 



Date of capture not 

 reported 



February. 



May 2 



May 4 



May 5 



May 14... 

 May 27... 



Place of capture 



Warrendale 



Astoria cannery 



Warrendale cannery. 



....do 



Astoria cannery 



...-do .-- 



Sand Island 



St. Helens -. 



.-..do 



Rainier. 



Ellsworth cannery. . . 



do 



Bonneville 



Astoria cannery 



Ellsworth cannery... 



Bonneville 



Ellsworth cannery... 

 Warrendale cannery . 



do 



Dahlia, Wash 



The Dalles.. 



Warrendale cannery . 

 Ellsworth cannery.-. 



do -. 



Bonneville cannery. - 

 Warrendale cannery . 



do -. 



Astoria cannery 



Pillar Rock... 



Pillar Rock cannery. 

 Ellsworth cannery. . . 

 Warrendale cannery - 



....do 



....do 



....do 



..-.do 



Clatskanie, Oreg... 

 Ellsworth cannery. 



do 



Cascade Locks 



Ellsworth cannery. 

 do.-- 



Se: 



Length, 



in 

 inches 



Male. 

 ..do., 

 .-do-. 



..do 



..do 



Female.. 



..do 



..do 



-.do 



..do 



-.do 



Male 



Female. - 



..do 



.-do 



Male 



..do 



25.75 

 36.5 



25.4 

 34.5 

 36 



Male 



Female - 

 ..do.... 



.-do 



.-do.... 

 Male 



Female 



..do 



Male 



..do 



...do 



Female 



Male- 



Female 



...do... 



Male... 



35.5 



27.26 



35 



37 



26 



37.5 



30 



32 



32.75 



36.5 



36.6 



35 



41 



35 



38 



32.5 



37 



23.5 



37 



36 



30 



28 



38 



22 



37 



37.5 



Scale record first 

 year 



37 

 44 



42 



37 



36 



41 



36.5 



37 



13 

 18 



31 

 20 

 20 



8.5 

 30.25 

 15 

 28 

 17.5 

 17.5 

 12.6 

 24.5 

 11.25 

 27.75 

 17 

 17 

 29 

 18 

 18 

 20 

 26 

 14.5 

 16 

 16 



22 

 17 

 19 

 21 



21 

 34 



37 

 32 

 17 

 27 

 24 

 23.5 



54 

 63 

 73 



51 

 66 

 54 

 39 

 51 

 44 



66 

 54 

 69 

 44 

 39 

 69 

 42 

 62 

 56 

 59 

 47 

 54 

 60 

 48 

 53 



71 

 57 

 SO 



As in all other experiments with chinook salmon of the spring run, these adults 

 entered fresh water during the early part of the season. They returned to the Colum- 

 bia River but not to the tributary in which they were liberated. One of the 6-year- 

 olds was taken in February. This is additional evidence that the marked spring 

 chinooks start their spawning migration some time before the commercial fishing 

 season opens on May 1. 



The scales of the adult fish have typical stream nuclei surrounded by ocean 

 growth, which is divided by distinct annual checks into the expected number of 

 summer bands. The margins of many of the scales have been absorbed, but enough 

 of the scale remains in every case to show that the fish is of the correct age. The scale 

 of a 5-year-old (shown in fig. 60) illustrates well the extent of absorption. As an 

 illustration of the scale of a fish in its sixth year, one from the fish caught in February 



