10 20 30 ro 20 30 9 19 29 8 10 20 30 K) 20 30 9 19 29 6 10 20 30 10 20 30 9 19 29 



April Mo; Juni July April May Junt July April Moy Junt 



,18.9 ,1*4 



10 20 30 10 20 30 9 19 29 8 10 20 30 10 20 30 9 19 29 8 10 20 30 10 20 30 9 19 29 



April May Junt July April May Junt July April May Junt 



Figure 9.--Pink and chum salmon fry migration patterns for six study streams in Prince William Sound area. 



the influence of 14-foot tides. One day's fish- 

 ing resulted in a zero catch, and the traps 

 were moved to a location about 2 50 feet further 

 downstream. Large catches were never made 

 after May 21 when the traps were moved, 

 although this may have reflected a normal 

 decline in the migration. Catches probably 

 would have been larger after May 20 if traps 

 had fished in the original position, since there 

 is a considerable amount of spawning area be- 

 tween the sites. Assuming this to be true, the 

 percentage of total catch as plotted in figure 9 

 would have been lower before May 21 and 

 higher after May 20, if the traps had not been 

 moved. 



The migration patterns for pink and chum 

 salmon fry were similar in each stream that 

 produced both species, with the exception of 

 Pigot Bay and Cannery Creek. Traps were not 

 fished at Pigot Bay between May 12 and May 20 

 as a result of a severe storm on May 12 which 

 washed out the installation. At Pigot Bay the 



pink fry migration reached a peak during April, 

 and the chum migration peaked much later. At 

 Cannery Creek the reverse was observed, with 

 the chum fry migration reaching a peak during 

 early May and the pink fry migration peak oc- 

 curring later. 



If results from the study streams are repre- 

 sentative of the various strata, fry migrations 

 in 1957 began in early-run streams about April 

 10, in middle-run streams after April 20, and 

 in late-runs streams after May 1. 



Fishing at Olsen Bay was continued through 

 July 4 to determine if the complete migration 

 had occurred by June 19, when the other sta- 

 tions were closed. Between June 19 and July 4, 

 3,263 pink and 1,828 chum salmon fry were 

 taken. This represents 3.6 percent of the pink 

 and 4.5 percent of the chum salmon frv taken 

 and suggests that a small percent of the runs in 

 other streams may have occurred after the 

 traps were removed. 



II 



