PROPAGATION AND DISTRIBUTION OF FOOD FISHES, 193 1165 

 ROCKY MOUNTAIN TROUT STATIONS 



The Kocky Mountain stations and their substations have a large 

 capacity for the production of trout and are carrying on field opera- 

 tions which yield large collections of eggs from wild fish annually. 

 The surplus trout eggs so secured are transferred to others of the 

 bureau's stations after the requirements of the parental waters are 

 met. The western trout stations must meet a dual demand since they 

 are called upon for extensive plantings of fish in the public domain, 

 particularly the national forests and national parks, in addition to 

 supplying fish to the individual angler or sportsmen's groups in 

 the usual manner. 



BOZEMAN (MONT.) STATION AND SUBSTATIONS 



[W. T. Thompson, Superintendent] 



The Bozeman station and its auxiliaries experienced a very prosperous year 

 and succeeded in establishing a new record in almost every line of endeavor. 

 The total number of eggs handled by this group of stations amounted to 

 30,675,070. The distribution resulting therefrom numbered 24,558,645, and a 

 total of over 6,000,000 eggs, fry and fingerling fish were on hand at the close 

 of the year. 



Bozeman {Mont.) station. — The station enlarged its rearing operations 

 to the extent that 24 carloads of choice fingerling fish were produced for 

 general distribution in addition to the considerable numbers utilized in sup- 

 plying near-by applicants and making local public plants. No brood stock 

 is maintained at Bozeman. In the course of the year, 1,197,200 rainbow 

 trout eggs and 10,256,550 Loch Leven trout eggs were transferred there 

 from the Meadow Creek (Mont.) field, largely for the purpose of eying and 

 shipping on assignment. There were also received from other stations of 

 the bureau 550,000 fall-taken Missouri rainbow eggs, 49,020 black-spotted 

 trout eggs from domesticated stock reared at Pittsford, Vt., 573,000 black- 

 spotted trout eggs from wild fish of the Yellowstone Park, and 132,000 brook- 

 trout eggs from Springville, Utah, making a total of 1,304,020 eggs obtained 

 by transfer from outside stations. There were also received through the 

 medium of exchange 109,000 rainbow-trout eggs, 2,474,900 black-spotted trout 

 eggs from the Montana Department of Fish and Game, and 10,000 golden- 

 trout eggs from the California Fish and Game Commission. The above made 

 a total of 2,593,900 eggs received by exchange and a grand total of 15,351,670 

 derived from all sources. 



The station continued its experimental work in the feeding of liver-meat 

 meal, prepared from horse flesh, to young fish in hatchery troughs, and the 

 value of this material for the rearing of trout up to the No. 3 fingerling stage 

 was successfully demonstrated. It is considered that the station's greatest 

 contribution to fish-cultural information during the year was the success 

 attending its experimental work for the purpose of ascertaining the proper 

 water temperature and other conditions requisite for the production of choice 

 Loch Leven trout fingerlings. This problem has now been largely solved. 

 As in the past, harmonious relations were maintained with the Montana 

 Fish and Game Commission. In the course of the year that organization sup- 

 plied green eggs to the Meadow Creek substation. These were incubated 

 and reared to the planting stage and then planted in suitable State waters 

 in cooperation with the State officials. 



Meadoiv Creek (Mont.) substation. — At this point record collections of rain- 

 bow trout and Loch Leven trout eggs were made, the numbers amounting to 

 4,120,800 and 18,379,400, respectively. An initial collection of 44,000 black- 

 spotted trout eggs was made as a result of recent development efforts. A 

 total of 1,617,200 rainbow eggs were transferred to Bozeman and Glacier 

 Park and 600,000 were shipped on assignment — all being reported as received 

 in excellent condition. Fingerling rainbows to the number of 1,183,400 were 

 planted in Madison Valley waters, and 1,051,400 remained on hand at the 



