44 



BULLETIN OF THE BUREAU OE FISHERIES 



run of 1922, three of which (5 3 , 6 3 , and 6 4 ) comprised nearly 97 per cent of the run. 

 Had these been present in fairly uniform relative abundance throughout the season, 

 very few samplings would have answered our purpose; but such was by no means the 

 case. The two major groups, especially (5 3 and 6 3 ), varied widely in this respect, the 

 5 3 group being present in largest relative numbers during the latter portion of the 

 season, when the 6 3 's were least abundant, the two varying fairly uniformly in opposite 

 directions, until in August and September the 6 3 's had almost disppeared from the run. 

 In Table 10, we give, for each of the days throughout the season in which samples 

 were taken, the percentage in which each age group was present. The marked trend 

 toward increasing percentages in the 5 3 's and diminishing percentages in the 6 3 's as 

 the season advances is clearly apparent. A similar phenomenon is also obvious in 

 other age groups. In the next most important group, the 6 4 's, there is a less marked 

 but still evident tendency in the same direction as in the 5 3 's toward relative increase 

 in the latter part of the season. This is also unmistakable in the groups 4 2 , 4 3 , 4 4 , 5 4 , 

 and 5 5 , while in 4i and 5 2 the reverse again is the case, these two groups agreeing with 

 6 3 in running predominantly or altogether in the early part of the run. The constitu- 

 tion of the run is therefore a constantly changing one, with certain groups increasing 

 as the season progresses or making their appearance only toward its latter end, while 

 other groups are either confined to the first few weeks or appear in largest relative 

 numbers at that time. 



The early running groups (4j, 5 2 , and 6 3 ), we note with interest, differ widely in age 

 but agree in the length of time they spent in the sea, which is one year in excess of the 

 period spent by the late-running groups above enumerated. A comparison with 

 similar data for subsequent years will be of value. 



Table 10. — Percentage of all classes, Karluk run of 1922, in random samplings taken on a 



series of dates 





Date 



it 



4 2 



4 3 



44 



5a 



5s 



5i t 



5 5 



6 3 



64 



6» 





June 5 - 



1.5 









1.5 



1 



1 



3 



31 

 31 



28 

 42 

 28 

 46 

 28 

 36 

 33 

 37 

 38 

 36 

 36 

 59 

 66 

 68 

 84 

 72 

 67 

 73 

 71 

 81 

 94 

 84 

 87 

 83 

 72 

 75 

 86 

 89 

 94 

 87 

 89 







66 

 68 

 68 









































3 









1 



1 



1 









53 













1 

 1 

 1 

 1 





69 

 48 

 66 

 57 



1 

 3 

 5 

 1 

 3 

 7 

 4 



11 

 9 



13 

 4 

 4 







June 19-. 



1 







1 





























4 



3 





1 



3 











1 





1 58 









1 









56 

 56 

 48 

 55 

 27 

 27 

 26 

 11 

 20 

 23 

 19 

 15 

 15 

 3 

 7 

 7 

 3 

 3 

 1 

 3 

 1 

 1 

 1 

 1 







July 5 - 





1 









1 

 5 









July 8-- - - 

















July 12- 



















July 14 - - 













1 









July 17 





1 

 1 



1 











1 



1 



July 20-.- 















July 24.. - 











1 





4 

 8 

 8 

 8 

 9 

 3 

 1 

 7 

 5 

 12 

 20 

 19 

 4 

 3 

 2 

 4 





July 27 



















July 31 - 

















1 



1 



Aug. 3-. — 

















Aug. 7 - 





1 



3 

 1 













1 



Aug. 10- — 















Aug. 14- 





1 

 1 

 1 

 1 

 1 

 1 







1 

 1 









Aug. 17.- - 

















Aug. 21.. 

















Aug. 24-.. 











1 

 3 

 4 

 3 

 3 

 1 









Aug. 28.. 





1 













Aug. 31 















Sept. 4 





1 

 4 



1 



3 

 3 



1 











Sept. 8 















Sept. 11 





1 



1 

 3 













Sept. 14 





3 





1 







Sept. 18. 







4 























