PROPAGATION AND DISTRIBUTION OF FOOD FISHES, 1921. 55 



SPEARFISH (S. DAK.) STATION. 

 [D. C. Booth, 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 eifect 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,r)00 brook-trout eggs, 37,600 Locli 

 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 4G,000 green brook-trout eggs 

 were j)urrhased from a local source, and 25.000 lake-trout eggs were 

 receive<l from the Duluth station. The fry and fingerlings resulting 

 from all of this stock entered into the general distributions. 



SPRINGVILLE (UTAH) STATION AND SUBSTATION. 

 [Claudius VVallich, Superintendent.] 



Fish-cultural work in tliis field during the year resulted in the 

 distribution to a])plicants or in local waters from which ogg collec- 

 tions were made of 4G3,600 Xo. 2 to No. 5 fingerling brook, black- 

 spotted, and rainbow trouts. 25(),()0() eyed rainl)ow-trout eggs, 2,000 

 fingerling catfish, and 000,000 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, Speai'fish. and Clackamas stations. These eggs 

 do not enter into the records as an output of the Springville station. 



Kggs to the number of 51,400 were ()l)taine(l from the brood stock 

 of brook tront nt their first s])awning. Because of inadequate facili- 

 ties for handling the spawning fish thei-e was a loss of eggs from 

 natural sj>awning. The eggs taken were of a quality equal to that 

 from wild fish. Spawning continued throughout the month of 

 December. The brood .stock of l)lackspotted 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 f|uality of the eggs was somewhat imjiaired. 

 Spawning of the rainbow trout continued from December 30 to 

 March 19, during whifh period 179.000 eggs were taken. In con- 

 trast to the brook trout the rainbows have continued in a healthy and 



