PROPAGATION AND DISTRIBUTION OF FOOD FISHES, 1922. 35 



Fish thus treated showed no signs of " nipping," which is an indica- 

 tion of insufficient food and is frequentlj^ troublesome in trough-fed 

 fish. 



Transfers of eggs of other species to Clackamas station included 

 a consignment of 50,000 black-spotted-trout eggs from the Yellow- 

 stone National Park; 400,000 brook-trout eggs from Springville, 

 Utah; and 50,000 rainbow-trout eggs from the Madison Valley 

 (Mont.) field. The fry resulting from all these were on hand at 

 the close of the year. 



UPPER CLACKAMAS (OREG.) SUBSTATION. 



On the Upper Clackamas River, where fishing and spawning 

 operations were conducted from August 23 to September 13, the re- 

 sults in eggs collected did not equal those of last season, owing to a 

 lighter run of fish and to illegal fishing. Eggs to the number of 

 841,300 were secured, and these, together with 1,450,000 eyed eggs 

 forwarded from the Little White Salmon hatchery, produced 

 2,111,000 fingerling salmon for liberation in local waters. There 

 was at no time any extraordinary loss of either fish or eggs, though 

 once during January the water was suddenly reduced and the hatch- 

 ery had to be operated on a minimum supply for a period of four 

 and one-half hours. Taken as a whole, the season was a very satis- 

 factory one, aside from the fact that liberations of stock had to be 

 made from time to time at an earlier period than was desirable, in 

 order to relieve congestion. In future the retaining rack at this 

 station will be installed 500 yards farther downstream than hereto- 

 fore, with the view of including an existing eddy within the in- 

 closure as a place of rest and protection for spawning salmon. It 

 is anticipated also that the take of eggs will be somewhat increased 

 by this change. 



LITTLE WHITE SALMON (WASH.) SUBSTATION. 



In the face of a light run of salmon and a pack slightly below the 

 average, it is gratifying to report that brood salmon in unusual 

 numbers made their appearance at the bureau's stations on the 

 Columbia River and all conditions during the fishing season were 

 favorable. Eggs were taken on the Little White Salmon River from 

 September 10 to October 20, amounting to 33,641,000. Soon after 

 the close of the spawning season a severe storm broke, filling the 

 watercourses with coarse hail and converting the streams into ice 

 packs. One flume was carried away by a snow and hail slide, and 

 later on the main flume ceased to function temporarily, being 

 pushed out of line and otherwise damaged. However, through the 

 exercise of intelligent and persistent effort the small flume was re- 

 placed during the night and the main one patched to serve out the 

 season, though the entire system will have to be extensively repaired 

 in advance of next season's operations. The roads were blocked for 

 months after the storm, rendering inoperative to some extent the 

 plan of relieving congestion in the hatchery by the transfer of eggs 

 to other units. For this reason more fish were produced than the 

 available space would accommodate, and though all of them were fed 

 for a time a considerable number had to be released in the No. 1^ 



