ALASIv.^ FISHERY AND FUR-SEAL INDUSTRIES, 1931 37 



began to pass upstream. On that date eight chums were counted, the 

 run continuing in small numbers thereafter until the early part of 

 September. Although 4 pink salmon passed through the gates on 

 July 6, it was not until 20 days later that the next count was made, and 

 no appreciable numbers appeared until August 13. As a large school 

 of pink salmon was noted inside the stream markers on July 25, it is 

 evident that the fish spend considerable time m brackish water at the 

 mouths of streams before they be^in to ascend. The weii- was main- 

 tamed through September 15, when the total escapement numbered 

 27,506 pink salmon, 3,821 chums, and 11 cohos. Robert Rogers 

 acted as operator of the weir and stream guard of the Olsen Bay area, 

 under the supervision of Warden N. O. Hardy. 



KARLUK RIVER 



The erection of the Karluk weir was begun on May 6; and although 

 attended with some difficulty because of high water, it was completed 

 on Alay 14. The first red salmon were observed below the weir on 

 May 19, but they did not begin to pass through the counting gates 

 until May 24. Counting was continued through October 8, when the 

 total escapement was 873,428 red salmon, 3,303 kings, 9,050 cohos, and 

 43,496 pinks. A few reds, cohos, and steelheads were still in the 

 lagoon at the time the weir operations were suspended and the struc- 

 ture was removed. 



Commercial fishing for salmon in Karluk waters began on Jime 6 

 and closed on September 28. The reported commercial catch of red 

 salmon from the Karluk run was 692,786, or approximately 44 per 

 cent of the total. 



The first red-salmon fingerlings migrating downstream were noted 

 on May 21, the migration continuing through June. Fifty thousand 

 of these fingerlings were marked for scientific study. Efforts to 

 exterminate predatory fishes were curtailed by high water and by the 

 presence of large numbers of red-salmon migrants, but some 

 3,000 Dolly Varden trout were caught with a seine during the season. 



Counting operations at the weir were in charge of Ray S. Wood, 

 under the direction of Warden H. H. Hungerford. 



ALITAK BAY 



Weirs for counting the escapement of spawning salmon in the 

 Alitak Bay region were again operated in four streams tributary to 

 Olga Bay. The weir at the cannery station was completed on May 7, 

 that at the upper station on May 11, the Horse Marine Lagoon weir 

 on May 21, and the Silver Salmon Creek weir on June 30. Traps for 

 the capture of Dolly Varden trout were installed at all weirs, and small 

 seines and hand lines also were used from time to time in this work, 

 resulting in the take of 67,304 of these predatory fishes during the 

 season. 



Red salmon began to appear at the cannery station weir on May 23, 

 and at the upper station on the following day, while at the other weirs 

 no salmon were tallied until nearly the middle of July. The run at 

 Silver Salmon Creek was very light and of short duration. As 

 heretofore, the bulk of the red-salmon escapement passed through the 

 upper station weir, where the run reached its peak on August 30, with 

 a tally of 55,021 reds on that day. Of a total of 340,236 red salmon 



