PROPAGATION AND DISTRIBUTION OF FOOD FISHES, 1921. 55 
SPEARFISH (S. DAK.) STATION. 
[D. C. Booru, Superintendent. ] 
There was a decrease in the output of this station during the fiscal 
year 1921 as compared with previous years, this condition resulting 
from the very limited water supply available. For a number of 
years the spring that has furnished the station with water has been 
decreasing in volume, until during the season of 1920 its flow did 
not exceed 25 gallons per minute. Quite opportunely, the city of 
Spearfish found it necessary to augment the city supply by con- 
structing a new reservoir, and the bureau was able to effect an ar- 
rangement whereby it obtains the surplus water for its fish-cultural 
work. The expense involved in installing the new system made it 
necessary to greatly curtail all other expenditures during the year. 
From the brood fish on hand 222,500 brook-trout eggs, 37,600 Loch 
Leven-trout eggs, and 79,000 rainbow-trout eggs were obtained 
These collections were supplemented by the transfer of 150,000 rain- 
bow-trout eggs from the Bozeman and Springville stations and 200,- 
000 of that species from a commercial fish-culturist in Pennsylvania 
in exchange for an equal number of brook-trout eggs furnished from 
the bureau’s Leadville station. Some 46,000 green brook-trout eggs 
were purchased from a local source, and 25,000 lake-trout eggs were 
received from the Duluth station. The fry and fingerlings resulting 
from all of this stock entered into the genera] distributions. 
SPRINGVILLE (UTAH) STATION AND SUBSTATION, 
[CLauDIUS WALLICH, Superintendent. ] 
Fish-cultural work in this field during the year resulted in the 
distribution to applicants or in local waters from which egg collee- 
tions were made of 463,600 No. 2 to No. 5 fingerling brook, black- 
spotted, and rainbow trouts, 250,000 eyed rainbow-trout eggs, 2,000 
fingerling catfish, and 600,000 fry of the Bonneville whitefish from 
the Paris (Idaho) substation. In addition to the above approxi- 
mately 700,000 fry and fingerlings of the various species of trout 
handled remained on hand at the close of the year and a total of 
1,202,000 eyed brook-trout eggs were shipped, being consigned to the 
Bozeman, Saratoga, Spearfish, and Clackamas stations. These eggs 
do not enter into the records as an output of the Springville station. 
Eggs to the number of 51,400 were obtained from the brood stock 
of brook trout at their first spawning. Because of inadequate facili- 
ties for handling the spawning fish there was a loss of eggs from 
natural spawning. The eggs taken were of a quality equal to that 
from wild fish. Spawning continued throughout the month of 
December. The brood stock of blackspotted trout yielded 107,800 
eggs, the spawning season extending from March 20 to May 20. An 
overflow of muddy water through the pond system during the spawn- 
ing season interfered with the most efficient conduct. of the spawn- 
taking work, hence the quality of the eggs was somewhat impaired. 
Spawning of the rainbow trout continued from December 30 to 
March 19, during which period 179,000 eggs were taken. In con- 
trast to the brook trout the rainbows have continued in a healthy and 
