REPORT OF THE COMMISSIONER OF FISHERIES. 35 



lake. On account of the large amount of snow in the mountains to 

 the east of the lake, the indications were that no fish would be 

 found in the streams of that section until early July. Collections 

 during June, 1922, were about equal to those during the entire season 

 of 1921, and for the entire season of 1922 will probably be larger 

 than the average. This increase is attributed to the heavier stocking 

 of lakes and tributary streams in recent years, made possible by co- 

 operation with the National Park Service. The superintendent of 

 Yellowstone Park has rendered valuable assistance by furnishing 

 pack trains for transporting the fish to the more inaccessible waters. 

 Credit is also due the State of Wyoming for incubating eggs in the 

 State hatchery at Cody and planting most of the resulting fry along 

 the eastern boundary of the park. The Forest Service assisted in 

 distributing fish in the waters along its southern and western 

 boundaries. 



The Saratoga (Wyo.) station constructed a field hatchery at Sage 

 Creek, and succeeded in collecting 1,336,000 rainbow-trout eggs, 

 most of which were utilized in stocking Wyoming waters, in co- 

 operation with the State hatcheries. Glacier National Park hatchery 

 was well stocked with eggs shipped from Bozeman (Mont.), Leacl- 

 ville (Colo.), and the Yellowstone Park (Mont.) stations, and a 

 much larger number of fish were planted in the park than last year. 

 In cooperation Avith the park authorities the waters have been cata- 

 logued, and an effort will be made to plant therein the most suitable 

 species of fish, pursuing the work sj^stematically from year to j^ear. 

 Assisted by Glacier Park and Montana fishery officials, the superin- 

 tendent of the Bozeman (Mont.) station planted a consignment of 

 brook-trout fingerlinQ:s in the headwaters of the Upper Kootenai 

 River and Cameron Lake. 



Spearfish (S. Dak.) station continued to make improvements to 

 its pond system for the better handling of brook trout. This has 

 been made j^ossible through an arrangement with the city authori- 

 ties for the use of the surplus water from the city reservoir. In 

 the propagation of domesticated rainbow trout the results at this 

 station continue to show improvement in both quality and numbers. 



The most successful rainbow-trout work in the eastern section 

 of the country was accomplished at the stations located at Neosho, 

 Mo., White Sulphur Springs, W. Va., Erwin, Tenn., and Wythe- 

 ville, Va. In recent years the output of rainbow trout from the 

 Manchester (Iowa) station has been inferior, owing to the poor 

 quality of its brood stock, but new blood has been introduced, and 

 it is believed that this station will soon be producing eggs of its 

 former high standard. Neosho (Mo.) station made arrangements 

 with a company at Roaring River, Mo., for the collection of eggs 

 from semiwilcl rainbow trout, and approximately 600,000 were se- 

 cured from that source. At the Wytheville (Va.) station a filter 

 and settling tank was installed for the purpose of eliminating roily 

 water, heavy rains in that region causing the spring to become very 

 turbid at times. This apparatus will remove approximately 90 per 

 cent of the sediment from the water, making it practically clear at all 

 times. Formerly it was almost impossible to rear young brook trout 

 at this station, large numbers perishing every year during the roily- 

 water period, but under the improved conditions it is believed no 

 trouble will be experienced. 



