58 



BULLETIN OF THE BUREAU OF FISHERIES 



In the face of this constant inequality of the sexes in mature salmon of the 

 Karluk race stands the fact that among the fingerlings on their seaward migration 

 males and females are in equal numbers, or, if there be a slight inequality, it is in 

 favor of the males. Among 619 fingerlings taken at random in the spring of 1926, 

 315 were males and 304 females. Among 450 random selections of the spring of 

 1925, 227 were males and 223 females. Only two alternatives seem to confront 

 us by way of explanation. Beginning their sea life in equal numbers, the males 

 and females may have a different survival value, with a selective mortality acting 

 in favor of the females; or there may be a very considerable precocious development 

 of the males, which may elude us largely because of their small size, and with these 

 eliminated from the commercially valuable fish the preponderance of females would 

 be assured. 



ESCAPEMENTS AND TOTAL RUNS, 1921 TO 1926 



The weekly escapements during the five years in which the weir has been main- 

 tained are given in Table 25. In Table 26 we present data of the runs for these 

 same years. The runs represent the commercial catch plus the escapement. The 

 data "for the catch were secured from the three canneries that draw mainly from the 

 Karluk run — the Alaska Packers Association, the Northwestern Fisheries Co., and 

 the Robinson Packing Corporation. The data are complete except for 1921, in 

 which no figures are available for the Robinson Packing Corporation. Their pack 

 for that year is known to have been comparatively small, and it is believed that no 

 great error is brought in by taking the catch of the two other canneries as the total. 



Tabie 25. — Escapement of Karluk red salmon by weeks, 1921 to 1926 





1921 



1922 



1923 



1924 



1925 



1926 











1 



301 

 4, 149 

 86,111 

 148,417 

 127, 645 

 64, 913 

 67, 674 

 39, 837 

 10,882 

 25, 659 

 i 57, 894 

 l 36, 281 

 » 61, 502 

 l 54, 357 







June 1-7 



June 29-July 5 



July 27-Aug. 2 



Aug. 31-Sept. 6 _ 



5, 894 

 16, 254 

 155, 097 

 137, 331 

 195, 151 

 74, 291 

 72, 556 

 28, 668 

 19, 737 

 70, 954 

 96, 677 

 114, 102 

 58, 867 

 79,316 

 42, 974 

 143, 022 

 14, 760 



60 

 418 

 9, 921 

 8,355 

 57, 739 

 29, 897 

 46, 770 

 24, 366 

 19, 660 

 6, 877 

 8,035 

 19, 403 

 7,919 

 5, 595 

 ' 2, 500 

 i 2, 500 

 24,343 

 35, 618 

 61 



15, 721 

 29, 116 

 34, 336 

 236 



141 

 1,102 

 71, 724 

 28, 843 

 42, 169 

 62, 954 

 35, 647 

 9,274 

 3,497 

 31,491 

 24,691 

 66, 404 

 13, 036 

 48, 610 

 38, 467 

 27, 919 

 61,389 

 43, 217 

 10, 570 

 62, 641 

 9,110 

 1,683 



19 



30, 249 

 32, 733 

 20,440 



263,029 



211,021 

 34, 289 

 39, 927 

 25, 447 

 24,482 

 64, 752 



110,570 

 95, 862 

 19, 705 

 33, 797 



200, 217 

 74, 730 



100, 431 

 51, 815 



182, 763 

 4, 619 



577 

 80,704 

 479,455 

 437. 051 

 127, 537 

 45, 520 

 41,516 

 43, 339 

 34, 277 

 30, 300 

 77, 956 

 101, 703 

 80, 647 

 104, 139 

 224, 592 

 230, 498 

 91, 136 

 176, 939 

 49, 609 

 9,448 

 43, 314 

 23, 145 



Sept. 28-0ct. 4 









Total — 



























1, 325, 654 



384, 684 



694, 579 



775, 705 



1, 620, 927 



2, 533, 402 



1 Estimated; see text. 



