10 

 5 



1955 



5 





 20 



15 



10 



5 





 10 



5|- 







5-DAY TIME PERIODS 



Figure 3. — Timing of migrations of 1- and 2-annulus 

 sockeye salmon smolts from Little Kitoi Lake, 1955-63. 

 Data grouped by 5-day periods. 



Canada, 1957). In 1957, the egg-to-smolt sur- 

 vival in the Babine Lake system was 6.1 per- 

 cent (Fisheries Research Board of Canada, 

 1958), 



Fry-to-smolt stage. Little Kitoi Lake, as- 

 suming 30-percent egg-to-fry survival. - - The 

 fry-to-smolt survival that would result in 



DAY TIME PERIODS 



Figure 4. — Timing of migrations of 1- and 2-annulus 

 sockeye salmon smolts from Ruth Lake, 1957-62. Data 

 grouped by 5-day periods. 



Little Kitoi Lake, if the average egg-to-fry 

 survival is arbitrarily assumed to be 30 per- 

 cent, is shown in table 6. It is highly probable 

 that the average egg-to-fry survival could be 

 even higher than 30 percent, which would 

 reduce the figures on fry-to-smolt survival 

 correspondingly. Although most studies in 

 other areas have generally demonstrated less 

 than 10 percent survival from egg to fry, 

 these studies have been on stream-spawning 

 populations. Little Kitoi Lake sockeye spawn 

 almost entirely on lake beach sites. Data on 

 potential egg-to-fry survival in natural beach 

 spawning sockeye populations are not avail- 

 able, primarily because beach spawning areas 

 are difficult to sample. The most comparable 

 data are those of Quistorff (1962 and personal 

 communication) in which survival at the Baker 

 Lake artificial spawning beach averaged about 

 65 percent over a 4-yr. period. This survival 

 in a beach incubation situation indicates that 

 the 30-percent egg-to-fry survival assunned 

 for Little Kitoi Lake may be conserva- 

 tive. 



