7/8-7/23 



7/24-8/15 

 19 5 8 



6/6-7/7 



7/8-7/23 



7/24- 8/15 

 19 5 9 



6/6-7/7 



7/B -7/2 3 



7/24-8/15 



(f 



H n : 600 



: 57 



-I n = 122 

 1 n-.|l7 



■i n = 59 



H n = l5l 



^ n = 586 



^ n = 291 



i n=202 



500 600 



LENGTH 



700 300 400 500 



(MILLIME T E RS) 



Figure 9.--Length of red salmon taken at various periods for 3 years. The range of 

 measurements is indicated by the length of the horizontal lines; the means, by the 

 vertical lines, and two times the standard error of the means, by the solid bar. 



9 5 7 



Cr"= 268 



19 5 8 



9 5 9 



A', E COMPOSITION 



Figure 10.-- Age composition of red salmon captured 

 in index fyke traps, 1957-59, 



riiort; age group 42 and 63 (2 years in the 

 ocean) fish than in 1957. ■* Also, age group 

 dominance shifted from 59 in 1957 and 1958 

 to 53 in 1959. 



The sex composition also changed seasonally 

 and varied from year to year (table 4), In 

 1957 and 1959 the early part of the run in- 

 cluded more males than females. After July 

 20 the reverse was true. In the 1958 study, 

 females were more abundant in the fyke traps 

 throughout the migration. 



We can merely speculate whether these 

 changes were true of the entire population or 

 were the effects of gear selection. The com- 

 mercial fishery was not sampled for compari- 

 son. 



EVALUATION OF FYKE TRAPS AS 

 TEST -FISHING GEAR 



The usefulness of fyke traps as a means of 

 indexing and defining the characteristics of 



*In the age designation 42. the first number refers 



to the total age of the fish from time of spawning. The 



-second number, written as a subscript, indicates the 



year of life in which the fish migrated to sea, again 



beginning with spawning. 



12 



