SALMON AND TROUT IN ALASKA. 27 



24tli and 650 on June 2. After this latter date the catch fell away; 

 June 3, only 9 yearlings were taken below Jordan Lake, and at station 

 2 on the 13th and 14th but 5 were obtained. 



These trials indicate that the migration in 1903 began about the 

 middle of May and practically ended early in June, though stragglers 

 continued to show into July. The maximum occurred about May 23, 

 after high water in the river and on high tides in the bay. 



In 1904 the run had begun before the work was commenced. The 

 first trial was made at station 2, May 17, and though the trap was 

 badly damaged, 10 yearlings were taken. On the 19th, with a trap 

 covering about 60 per cent of the channel, 863 yearlings were secured. 

 The run continued with variations till June 5, when a maximum catch 

 of 1,157 was made. After this date the catch rapidly decreased, only 

 83 being taken on the 10th, 50 on the. 13th, 4 on the 30th, and none 

 July 9 pJid 10. 



In comparing the runs of these two seasons it must be noted that 

 the conditions varied materially. In 1903 the heavy ice kept the 

 river closed until an unusually late date. The lakes werie not entirely 

 clear from ice until about May 12, and the temperature of the river did 

 not rise above 40° until after the middle of May. In 1904, at the 

 time of arrival of the working party. May 16, the river had reached a 

 temperature of about 44° and the ice had been gone for several weeks. 

 By the latter part of May the temperature had risen to 50°, and by 

 June 2 to 52°. In 1903 this latter temperature was not reached till 

 June 13, yet in 1904 the run continued over almost the same period 

 as in 1903, reaching its maximum perhaps somewhat later. This fact 

 must be related to the much greater output of the hatchery for the 

 latter year. In 1902 about 10,000,000 fry were liberated, under 

 primitive conditions; the followmg year nearly 30,000,000 were 

 planted under somewhat better conditions. The product of natural 

 spawning is a negligible factor. 



YES BAY STREAM. 



Yes Bay is about 30 miles north of the Naha on Behm Canal. 

 The river is somewhat larger than the Naha and about 1 mile in 

 length below the lake. Yes Lake is nearly 4 miles in length and of 

 average width less than one-half mile. The greatest depth is 230 

 feet. Above this lake the river offers about tkree-fourths of a mile 

 of excellent spawning ground, at the end of which the further ascent 

 of fish is cut off by high falls. These falls were passable at one time, 

 perhaps, as Dolly Varden trout have been taken above them. At a 

 considerable elevation are other lakes of less extent that have not 

 yet been explored. 



Yes Lake has no tributaries that are occupied by spaAvners except 

 the main stream. The sockeyes use the upper river above the lake. 



