itARLUJK KlVifiK RED-SALMON INVESTIGATION 



Table 14. — Karluk red-salmon run of 1924 

 [Average lengths, in centimeters, of age group 5j on a series of dates] 



Date 



June 9 and 10 



June 11 and 12... 

 June 13 and 14... 

 June 16 and 17... 

 June 18 and 19... 

 June 20 and 21... 



June 23 



June 25 and 26... 



June 27 



June 30 to July 1 



July 3 



July 5 



July 7 



July 8 and 9 



July 10 and 11... 

 July 12 and 14... 

 July 15 and 16... 

 July 17 and 18... 

 July 19 and 20... 

 July 22 and 23... 

 July 24 and 25... 

 July 25 and 28... 



Males 



60.0 

 59.9 

 60.0 

 60. 1 

 60.3 

 60.5 

 60.6 

 60. 5 

 60.2 

 60.3 

 60.9 

 61.6 

 62.4 

 62.6 

 63.0 

 63.2 

 63.6 

 63. 5 

 63.3 

 63.1 

 63. 1 

 63.3 



Females 



57.2 

 57.1 

 57.3 

 57.6 

 57.8 

 57.7 

 57.7 

 57.6 

 57.5 

 57. 5 

 57.6 

 57.8 

 58.2 

 58.6 

 59.0 

 59.3 

 59.7 

 59.9 

 59.9 

 59.6 

 59.5 

 59.4 



Date 



Julv 29 and 30.... 

 July 31 to Aug. 1. 



Aug. 2 and 4 



Aug. 5 and 6 



Aug. 7 and 8 



Aug. 9 and 16 



Aug. 18 and 19.... 

 Aug. 20 and 21.... 

 Aug. 22 and 23.... 

 Aug. 25 and 26.... 

 Aug. 27 and 28.... 

 Aug. 30 to Sept. 1 



Sept. 2 and 4 



Sept. 6 and 8 



Sept. 9 and 10 



Sept. 11 and 12... 

 Sept. 13 and 15... 

 Sept. 16 and 18... 

 Sept. 22 



Mean 



Males 



Females 



63.5 



59.5 



63.6 



59. 6 



63. 6 



59.6 



63. 6 



59.6 



63.8 



60.0 



64. 1 



60.8 



64.7 



61.5 



65.0 



61.8 



65. 1 



61.9 



65. 1 



61.9 



65. 1 



61.7 



65.2 



61.4 



65.3 



61.2 



65.5 



61.5 



65.7 



62.0 



65.9 



62. 1 



65.7 



61.8 



65.4 



61.0 



65. 1 



61. 1 



63. 1 



59. 6 



KARLUK RED-SALMON RUN OF 1925 



The most important brood years for 1925 were 1919 and 1920, the former fur- 

 nishing the 6-year fish, which constituted 21 per cent of the run; the latter the 

 5-year fish, with 72 per cent. Taken together, the product of the two years com- 

 prised 93 per cent of the run, to be compared with the 96 per cent in 1924. The 

 remaining 7 per cent in 1925 were largely 4-year fish, of which the 4 3 group (largely 

 of male grilse) was again in greatest numbers. It will be noted that the 5-year 

 fish in 1925 were relatively less numerous than in 1924 (72 per cent instead of 79 

 per cent) and the 6-year fish more numerous (21 per cent instead of 17 per cent). 



The random sampling for the season was on the same scale as in 1924, with 

 daily takes whenever possible throughout the fishing season. Unfortunately, the 

 first half of June is almost wholly unrepresented. Eleven age groups were present 

 at some time during the season, including the 3i group, which previously had been 

 observed only in 1917, when two specimens were included in our few samples for 

 that year. Thirty individuals appeared in our 1925 material, with the males twice 

 as numerous as the females. The 3i group consists of individuals that proceeded to 

 sea in the fry stage during the season in which they hatched and matured in their 

 third season. The fry migrants in the Karluk usually spend an additional year in 

 the sea, returning as members of the 4i group, but in 1925 the latter group contains 

 less than half as many members as the former. 



The total number of individuals obtained by random sampling in 1925 was 

 5,513, which are grouped by age, sex, and length in Table 15. The age groups 5 3 , 

 6 4 , and 6 3 are here stated in the order of their importance in the run, their relation 

 represented, respectively, by the percentages 78, 18, and 4. Corresponding figures 

 for 1924 are 81, 14, and 5, and in the abnormal year 1922, 63, 6, and 31. 

 68335—27 4 



