PROPAGATION AND DISTRIBUTIONT OF FOOD FISHES, 1935 419 



The activities at the Yellowstone Park substation were adminis- 

 tered from the Salt Lake City headquarters. Inasmuch as the work 

 covorino: the mitlsummor months extends into parts of two fiscal years, 

 the (lata furnished here cover the sunmier of 1934. The total collec- 

 tion of black-spottod trout en:p;s exceeded 38,000,000, surpassin^^ anv 

 previous season. Over 4,000,000 graylino; ego;s were also collected. 

 The destruction of penned fish and pens by bears was halted by simply 

 keeping dogs in the vicinity of the racks. The larger percentage of 

 the output was retained for restocking in Yellowstone Park or in 

 other national parks. A new water supply line was installed. 



At the Springvillc, Utah, station the brood stock of rainbow trout 

 yielded over 2,000,000 eggs, an increase of almost half a million over 

 last vear. A l}^-acre bass pond was completed with relief labor. 



Tlie Bear Lake, Utah, substation handled about 1,300,000 trout 

 eggs. Some losses were expeiienced in rearing the fry and fingerlings. 

 This was traced to excess nitrogen in the water and was corrected by 

 aeration. The station hatched about 250,000 landlocked sockeye 

 salmon luiown as "silver trout", for planting in local waters. 



The Spearfish, S. Dak., station received over 10,000 hours of relief 

 labor wliich was utilized in overhauling the pond system, renewing 

 the water supply system, and numerous improvements to buildings 

 and grounds wliich have greatly improved the efhciency and appear- 

 ance of the plant. Approximately 7,300 cans of trout fingerlings 

 were distributed providing for ample stocking of the territory served 

 by this hatchery. 



The Saratoga, Wyo., station was able to acconiplish little in the 

 way of major improvements, although a small Civilian Conservation 

 Corps detail was used in building a wall along the creek through the 

 station grounds. Fish-cultural work was conducted at a normal level 

 with a good take of black-spotted trout eggs from station brood stock. 



In the Colorado field, the Lead\dlle station has partially completed 

 a new rearing pond. This station together with the substation at 

 Creede cooperated with piivate parties in the collection of trout eggs, 

 and the two establishments handled over 12K million eggs. The 

 substation at Crystal Lake was used chiefly for rearing purposes. 

 A iK-acre earth rearing pond was constructed at Creede with Ci\alian 

 Conservation Corps labor. Flood waters destroyed a dam in a storage 

 reservoir at the Leadville station, affecting the power plant water 

 supply. . 



At the Hagerman, Idaho, station a cold-storage room was mstalled, 

 power being generated on the prcm.ises. Some work was done on 

 overhauling the living quarters. Wliile there was considerable loss on 

 eggs shipped in from, other points, operations as a whole were satis- 

 factory and the rapid growth of the fish at this station makes it a 

 valuable unit. 



The Salmon, Idaho, substation was operated during the summer 

 months for the rearing of fish derived from egg collections at Williams 

 Lake. The take of over 3,500,000 eggs at this point exceeded all 

 previous records. 



Civihan Conservation Corps labor was available at the Crawford, 

 Nebr., station for repairs and improvements to bass and trout ponds 

 on the Fort Robinson Reservation. 



The extensive operations in the Montana territory were highly 

 successful. 



