PROPAGATION AND DISTRIBUTION OF FOOD FISHES, 1939 588 
installation of a steam-heating plant in the hatchery building, and the 
fencing of station grounds. 
Although the bass production was small, the total output of the 
4 species of fingerling fish handled at the Miles City (Mont.) substation 
was larger than during either of the 2 preceding years. The small 
production was attributed to an inadequate supply of mature brood 
fish and the delay in harvesting, which was caused by very hot weather 
prevailing after a large amount of the water had been drawn from 
the large lake. However, the large size of the fingerling bass col- 
lected compensated for the small number taken. The large num- 
ber of reservoirs built by the Farm Security Administration in this 
section of the country is creating a bigger demand for pondfishes, 
especially catfish, and special effort is being made to increase the pro- 
duction of this species. From the Nebraska Conservation Commis- 
sion 1,900 adults, 10,000 fry, and 40,000 channel catfish eggs, green 
and eyed, were received in exchange for grayling eges. 
Inasmuch as the work at the Yellowstone Park station covered. the 
midsummer months extending into parts of 2 fiscal years, the data 
furnished here cover the season of 1938. Because of high-water 
conditions, much difficulty was experienced in maintaining the fish 
traps. For instance, the trap in Pelican Creek, which was by far the 
largest producing trap in 1937, could not be operated from May 25 to 
June 10 because of extremely high water. Notwithstanding these 
conditions, the take of eggs was more than 37 million, which is con- 
sidered an average collection although it was approximately 10 
million less than during the season of 1937. There was an increase 
in the number of fish reported as being taken from the waters of the 
Yellowstone Park this year, while the number of Park visitors was 
slightly less than last year. In 1938 there were 163,859 fish reported 
at the checking stations, while the number reported in 1937 was 
135,654. 
The Jackson Hole (Wyo.) substation, which was operated on a 
seasonal basis, produced approximately 870,000 blackspotted, lake, 
rainbow, and brook trout, and grayling for stocking waters of the 
Grand Teton National Park and the Teton National Forest. A 
C. C. C. project permitted development of a number of improvements, 
including the repairing of 4 circular concrete ponds, the construction of 
2 rectangular ponds, and the landscaping of station grounds. 
A new three-stall garage was constructed and all buildings were 
painted at the Saratoga (Wyo.) station. The pond system was en- 
larged by the construction of 2 concrete ponds 100 by 10 feet, 2 con- 
crete ponds 60 by 6 feet, and one dirt pond with concrete ends. Fish- 
cultural work was carried on along usual lines and normal success was 
attained in the production and distribution of trout fingerlings. 
The Baker Lake (Wash.) station, which was formerly used for the 
propagation of salmon, was remodeled for the purpose of rearing trout 
to stock Baker Lake and tributary waters. During the early part of 
the year C. C. C. enrollees from a local camp assisted in the laying of 
pipe lines, rebuilding the intake dam, etc. This unit was operated 
on a fish-cultural basis only from June 1 to June 30. The fish which 
were received by transfer from other stations are being reared to a 
larger size before planting. Consequently, no distribution was made 
from this hatchery during the fiscal year. 
