PROPAGATION AND DISTRIBUTION OF FOOD FISHES, 1923. 



61 



When the eggs had reached the eyed stage shipments to a total of 

 1,225,000 were forwarded to applicants and to other stations of 

 the bureau, one consignment of 50,000 going to Alaska. The incu- 

 bation period of those held in the hatchery was completed by the 

 end of April, the number of fry produced amounting to 4,767,770, 

 or approximately 88 per cent of the retained stock. In addition to 

 the egg shipments the year's output of this species consisted of 

 3,345,000 fry and fingerling fish, and at the close of the year a con- 

 siderable number of fingerlings were still on hand. The brook- 

 trout fields occupied during the year, the number of eggs secured 

 in each, and the dates between which egg collections were made 

 were as follows :' 



An output of 671,000 fry and fingerling black-spotted trout, the 

 product of 750,000 eggs of that species received in the summer of 

 1922 from the Yellowstone Park station, was distributed during the 

 fall to applicants in Colorado, Arizona, and New Mexico. The 

 year's distributions also included 196,150 fingerling rainbow, Loch • 

 I^-even, and lake trout, the output of the first two resulting from 

 eggs secured in the brook-trout fields, while the lake trout were de- 

 rived from a shipment of 150,000 eggs forwarded from the Duluth 

 (Minn.) station the previous winter. From a shipment of 50,000 

 steelhead eggs forwarded from one of the bureau's Oregon substa- 

 tions 45,800 fi-y were hatched and were on hand at the close of the 

 fiscal year. 



YELLOWSTONE NATIONAL PARK (WYO.) SUBSTATION, 



[C. L>. Gr.\ter and C. F. Culler, in c:iai-a:<'.] 



The fish-cultural season at this station involves a portion of each 

 of two fiscal yeai-s, and the part occurring in June, 1922, has been 

 covered in the report for that year. From July 1 to the close of 

 the season in September, 1922, operations were supervised by C. B. 

 (irater, superintendent of the Leadville (Colo.) station. Very suc- 

 cessful work was accomplished during the summer of 1922. The 

 black-spotted trout egg collections aggregated 16,751,920, and a large 

 proportion of the fry resulting from the eggs were liberated in 

 various streams within the reservation. In connection with the fish- 

 cultural operations a considerable amount of repair and improve- 

 ment work v,i\^. accomplished, among the most important items be- 

 ing the entire rebuildino- of the trap on Clear Creek, which was 

 located 18 inches deeper in the creek tlian was the one it replaced. 



