ROGERS: JUVENILE SOCKEYE SALMON 



Table 8. — Densities of parent spawners and mean beach seine catches of sockeye salmon fry for years 

 and lakes in which six or more seine hauls were made during 20 June- 19 July for 1962 through 1972. 



Lake 



Year 



(0 



Tikchik lakes 

 Igushik lakes 

 Nunovaugoluk 



Kulik 



Beverley 



Aleknagik 



1964 

 1965 



1965 

 1966 

 1969 

 1970 

 1971 

 1972 

 1969 

 1970 

 1971 

 1972 



1962 

 1963 

 1964 

 1965 

 1966 

 1967 

 1968 

 1969 

 1970 

 1971 

 1972 



tionship was obtained by regressing the mean 

 length on the logarithm of catch (Figure 10). 

 Thus the mean length of threespine stickleback 



7 8 



TEMPERATURE 



Figure 9. — Relationships between mean length (mm) on 

 20 June and mean surface water temperature from 20 to 

 24 June. Sockeye salmon fry (0): Y = 26.93 + 0.36 X 

 (r = 0.82). Arctic char fry (0): Y = 25.31 + 0.37 X 

 {r = 0.71). 



z 



Figure 10. — Relationship between mean length (mm) of 

 age I threespine stickleback on 20 June and mean catch 

 of sockeye salmon fry in the previous year (20 June- 19 

 July). Y = 37.24 - 3.53 logio^. 



at age I is largely determined by the abundance 



of their main competitor when they were age 0. 



The annual mean lengths on 20 July among 



1073 



