I 100 I |?oo Id I ">o I 200 |o I '<>o| I loo I o I lool | 



' FS ■$? ' IS ' CS ' FS 'SP IS ' CS ' FS "SP IS ' CS ' FS 'sp 



MILES FROM TRAP SITE 



Figure 8. — Tag recoveries per trap per time period by 20-inile intervals measured from the point of 



release in upper Chatham Strait, 1942. 



Chatham Strait exhibited a much stronger tendency 

 to linger in the upper Chatham Strait area and a 

 much weaker tendency to migrate southward and 

 eastward. There appears to be considerable variabili- 

 ty from year to year in the racial composition of the 

 pink salmon runs found in upper Chatham Strait in 

 the months of July and August. 



Middle Chatham Strait.— Two tagging 

 experiments were conducted in middle Chatham 



Strait in 1940, six in 1941, and two in 1942. All 

 releases of tagged fish, with the exception of that on 13 

 July 1941, were made from trap WE-69 within 15 

 miles of the junction of Chatham Strait and Frederick 

 Sound. The exception was from trap WE-65, 4 miles 

 north of the site of the other releases. 



Results from the two 1940 experiments are shown in 

 Figure 9 and Table 9. The first release (12 August) in- 

 volved 999 tagged fish, and thus constituted the 

 largest single release of the experiments covered in 



17 



