EARLTJK EIVEK RED -SALMON INVESTIGATION 41 



Table 7. — Random samples of the Karluk red-salmon run of 1919, distributed by age groups, sex, and 



length 



Length, in inches 



Age groups and sex 



Total 



4a 



4a 



5a 



5j 



63 



6< 



M 



M 



M 



F 



M 



J? 



M 



F 



M 



F 



21 - 



1 























W6- 



1 

 1 









1 



3 

 2 



10 

 7 



11 

 8 

 2 

 2 













22.. 





















223^. 





















23.. 



















3 





233^ 











2 

 2 

 6 

 7 

 7 

 7 

 5 

 1 

 1 











24... 

















1 





mt~ 













2 

 3 

 1 

 1 







25 



















25H 













1 



1 







26 









1 









26^ -- 

















27. 













1 











27^ 





















28.. 





















28^ 







1 

















Total 























1 



2 



1 



1 



38 



46 



1 



7 



2 



4 



103 





The run of 1921 was more generous than those that immediately preceded it, 

 being responsible for a pack of 119,000 cases, or approximately 1,670,000 fish. For 

 the first time in that year we are in a position to state the size of the spawning 

 escapement, which closely approximated the number of fish that entered the com- 

 mercial catch. The total run to the river in that year, then, amounted to somewhat 

 more than 3,000,000 salmon. Our samples are again very limited, consisting of two 

 lots, the first taken on August 7, consisting of 106 individuals, and the second obtained 

 August 16, with 105 specimens. In Table 8 we group these according to age, sex, 

 length, and the length of residence in fresh water. Not only are the 5 3 's again 

 dominant, but they are present in larger proportion than in any other run thus far 

 reported. Eighty-eight per cent of the samples are of this group and are derived 

 from the brood year 1916, which was signalized by a pack of over 167,000 cases. No 

 4-year fish were present in our samples, although the year from which they would have 

 been derived (1917) produced a pack almost as large as that of 1916. It is to be 

 noted, however, that 1917 gave no indication, in any subsequent year, of having been 

 a successful brood year. There can be no reasonable doubt that the great majority 

 of its progeny would return to the river in 1922 as 5-year fish, but the pack of that year 

 was only 46,000 cases. 



