64 U. S. BUREAU OF FISHERIES. 



From 66,150 Loch Leven trout e<i:gs taken from station brood 

 stock 27,000 fin*j^erlin«r fish were produced and distributed. This 

 species, which is highly regarded by local fishermen on account of 

 its game qualities, appears to outnumber any other trout in the Black 

 Hills region, though the bureau's distributions of it have been small 

 as compared with those of the brook and black-spotted trouts. This 

 is probably attributable to the more vigorous nature of the Loch 

 Leven and its ability to withstand conditions that tend to result dis- 

 astrously to other species. During May and June the station dis- 

 tributed approximately 59,000 rainbow-trout fingerlings, derived 

 from eggs secured from domesticated stock at the station, and early 

 in June a shipment of about 53,000 eggs of this species was received 

 from the Saratoga station. The eggs were in first-class condition on 

 arrival, and the subsequent losses of eggs and fry were merely nomi- 

 nal. Owing to their excellent quality it is the intention to reserve 

 a few thousand of these young fish to be reared for a brood stock. 



SPRINGVILLE (UTAH) STATION. 

 [Ci>AUDius WalliciIj Superintendent.] 



Fish-cultural work at this station proceeded along the usual lines, 

 and the aggregate output of the various species handled during the 

 year shows a satisfactory increase over that of the previous year. 

 Brook-trout eggs were obtained from the collecting station on Twin 

 Creeks, a tributary of Fish Lake, which, field for a number of 

 years past has been operated jointly by the bureau and the State of 

 Utah. Eggs to the number of 7,250,000 were obtained during the 

 spawning season, extending from October 23 to the end of Novem- 

 ber, and the collections were divided equally between the interested 

 parties. There has been a steady and very gratifying increase in 

 the numbers of spawning brook trout in evidence in all the spawn- 

 ing areas of Fish Lake, together with a corresponding increase in 

 the egg collections each season. During the season of 1922 the largest 

 number of eggs ever taken from the lakes were all obtained from 

 spawning areas in Twin Creeks, ahd no attempt was made to work 

 the numerous spawning beds on the west and south sides of the lake, 

 where spawning fish were unusually numerous. This improved 

 rvm of fish is attributed to systematic plantings of 3 and 4 inch 

 fingerlings in the lake every year since fish culture was first under- 

 taken in this region. The experience gained through a number of 

 years having clearly indicated that no satisfactory results could be 

 expected through the maintenance of a brood stock of brook trout, 

 all of the brood fish of that species on hand at the Springville station 

 were liberated during the year in open waters of the State. The 

 results already accomplished at the field station devoted to this 

 species show that efforts in brook-trout propagation can be more 

 profitably applied in this direction. 



About 482,000 eggs were obtained from the brood stock of rain- 

 bow trout. This species produces much more satisfactory results 

 under domestication at the Springville station than does the brook 

 trout. As funds were not available for maintaining a field force 

 for collecting rainbow-trout eggs, an agreement was effected with 

 the State Commissioner of Fish and Game for delivery to the bureau 



