588 
CHARLES WILSON GREENE 
Fig. 1 Photograph showing the corrosion of the aluminum marking buttons 
recovered from the marked fishes. The tags are not included for the fishes re- 
taken within a few days. 
was spent in water as salty as that represented by the region of 
Canby Light. 
Chinook number 123 was out thirty-one days and traveled 
up stream a distance of only fifteen miles, requiring two days for 
the journey. Its button was the second deepest corroded of the 
series. The corrosion is evidence that its bearer spent much if 
not most of the time below the point in the river where it was 
liberated. This evidence is second in importance only to actual 
capture of the fish below the region. 
One Chinook, number 113, was recaptured, six miles down the 
river from the point of liberation. As it was out only six days no 
corrosion occurred. 
The silver salmon made the longest runs, five of the six speci- 
mens re-taken having traveled a distance of two hundred and ten 
miles. Three of the five fishes, numbers 76, 89 and 97, each bore 
