PROPAGATION AND DISTRIBUTION OF FOOD FISHES, 1922. 59 



Grayling 250, 000 



Crappie 42, 352 



Large-mouthed black bass ^ 1, 946, 432 



Small-mouthed black bass 645, 808 



Rock bass 46,258 



Warmouth bass 2, 515 



Sunfish 141, 172 



Total 23, 422, 652 



ROCKY MOUNTAIN TROUT STATIONS. 



This group comprises the stations with their auxiliaries in the 

 States of Montana, Colorado, Wyoming, South Dakota, and Utah. 

 Their work is addressed to the trout indigenous to the region, to 

 the brook trout and rainbow trout, which have been transplanted 

 from other sections of the country, and to small numbers of the 

 Loch Leven trout. The aggregate output of this group for the 

 fiscal year 1922 was as follows : 



Brook trout 4,818,435 



Rainbow trout 3,324,840 



Black-spotted trout 2,498, 500 



Loch Leven trout 36, 000 



Total 10, 677, 775 



BOZEMAN (MONT.) STATION AND SUBSTATIONS. 

 [W. T. Thompson, Superintendent.] 



Besides the main station at Bozeman there were two important 

 auxiliaries, one on Meadow Creek in the Madison Valley, Mont., and 

 the other in the Glacier National Park, operated in connection with 

 the work of this field during the fiscal year 1922. 



BOZEMAN (MONT.) STATION. 



Fish-cultural work consisted in the propagation of brook, rainbow, 

 and black-spotted trouts from eggs procured from brood stock main- 

 tained at the station, by transfer from field and other stations of 

 the bureau, from the Montana Fish and Game Commission, and by 

 purchase from commercial dealers. The percentage of hatch ranged 

 from 70 to 99 per cent among the different lots, the latter percentage 

 occurring among the black-spotted trout transferred from Yellows- 

 stone Park. During the summer and fall of 1921 about 1,500,000 

 fingerlings of all species were delivered to the bureau's cars for dis- 

 tribution to applicants throughout the States usually served by this 

 station, and from the past season's hatch there was a similar number 

 on hand for distribution during the summer and fall of 1922. 



Of the brook-trout eggs handled at the station, 1,000,000, in round 

 numbers, were supplied from the Springville (Utah) and Leadville 

 (Colo.) stations of the bureau, 500,000 were purchased from a com- 

 mercial dealer, and some 60,000 were taken from the station brood 

 stock. The rainbow trout were all from eggs collected at the sub- 

 station on Meadow Creek, while the black-spotted trout were from 

 the Yellowstone National Park and from the Montana Fish and 

 Game Commission. The number of eggs and fry received from the 



