56 U. S. BUREAU OF FISHERIES. 



growing condition and successful results from the brood stock of 

 that species are anticipated. 



From the collecting stations located on Fish Lake, which are oper- 

 ating jointly by the bureau and the State of Utah, 1,901,400 brook- 

 trout eggs and 1,734,800 rainbow-trout eggs were obtained as the 

 bureau's share of the work. Employees of the bureau occupied the 

 station at Twin Creeks from October 30 to November 14, after 

 which the field was left to employees of the State. It is encouraging 

 to note that the run of brook trout at this point has increased since 

 the bureau's operations were undertaken, and it has been reported 

 from reliable sources that a noticeable increase in the average size 

 of the fish has occurred during the past two seasans, though this has 

 not been verified by actual measurements or weight. The abundance 

 of immature fisli in the creek and along the shores of the lake appears 

 to be a further indication of the success of the liberal planting of 

 large-sized fingerlings. 



During the course of the brook-trout egg collections it was noted 

 that the adult rainbow trout were dying in considerable numbers, 

 a condition that had existed for several months from information 

 brought out on inquiry. The cause of the mortality could not be 

 ascertained. The rainbow-trout spawning season at Twin Creeks 

 occurred between May 1 and June 4, and at this time there was no 

 indication of the mortality noticed in the previous fall. 



There are several promising opportunities for extending the trout 

 work of this station, among which may be mentioned the Kayune 

 Reservoir, which is the property of the U. S. Fuel Co. This reser- 

 voir has been offered to the bureau exclusively for fish-cultural 

 work, and the reports received from the plants of brook trout and 

 rainbow trout made in it are most encouraging. There are very 

 good prospects for early railroad communication with the Straw- 

 berry Reservoir, of the Reclamation Service, which is at present 

 inaccessible during the spawning season of the rainbow trout. A 

 recent investigation of Jorgensen Creek, a tributary of Fish Lake, 

 about 4 miles from the present camp on Twin Creeks, indicates that 

 a field station might profitably be established at that point. At 

 the time the place was visited 46 large fish which had been beheaded 

 by coyotes were noted. 



The substation established for the propagation of the Bear Lake 

 whitefish at Paris, Idaho, was opened on November 22 and operated 

 until April 10. The usual difficulties encountered during the egg- 

 collecting season — severe cold, violent winds, and snowstorms — pre- 

 vailed without a])atement. Eggs to the number of 1,050,000 were 

 taken, from which 000,000 fry were hatched and planted, 500,000 

 being deposited on the spawning grounds in Bear Lake and 100,000 

 in Utah Lake. 



COMBINATION TROUT AND POND FISH-CULTURAL STATIONS. 



The stations possessing the greatest attractions for the general 

 public are, perhaps, those located in sections of the country where 

 the natuial conditions make it possible to propagate both the Sal- 

 monidse and the pond fishes. At such stations a brood stock of the 



