634 U. S. BUREAU OF FISHERIES 



runs of salmon in various fields. Part of the assistance rendered to 

 various States by the bureau is made evident in the appended table 

 of fish egg assignments to State and Territorial fish commissions. 



The national forests and national parks, covering large areas in the 

 United States, abound in streams and lakes noted for their fishing. 

 As the Forest Service and the Park Service do not propagate fish 

 for these areas, the Bureau of Fisheries has undertaken to rear fish 

 for stocking them. Work of tliis character in Yellowstone Park is of 

 such magnitude that a large permanent hatchery and pond system 

 is in annual operation in that region. The same may be said of the 

 Glacier National Park, where a substation is maintained. During 

 the past year these two hatcheries produced nearly 6,000,000 fingerling 

 rainbow, black-spotted, and Loch Leven trout for distribution within 

 park boundaries. Most of the distributions were handled by em- 

 ployees of the National Park Service, that organization having con- 

 ducted biological surveys previously for the purpose of ascertaining 

 stocking requirements and formulating a planting policy. Other 

 national parks and national forests throughout the country receive the 

 benefit of the bureau's distributions. A hatchery site in Rainier 

 National Park in the State of Washington was selected in the course 

 of the year and a hatchery to supply trout for the waters in that 

 reservation will be erected soon. An extensive survey in the Wasatch 

 National Forest in Utah was made by the bureau with the view of 

 formulating a stocking policy. Plans for work of a similar character 

 in other national forest areas were also made. 



The bureau's egg-collecting work at Pyramid Lake, Nev., which is 

 dependent upon the tactful assistance of the Indian Service, has been 

 mentioned in connection with cooperation in Nevada. Incidental 

 to the bureau's general distribution work, many streams and lakes 

 in Indian reservations throughout the United States have been stocked 

 with fish. 



COOPERATIVE FISH NURSERIES 



A significant factor in emphasizing the interest manifested in the 

 conservation and restoration of the country's game fish resources is 

 the large number of active sportsmen's organizations. The members 

 of these associations enthusiastically indorse the work of propagating 

 and distributing game fishes; and many of the organizations, with the 

 bureau's advice and assistance, have established nurseries to aid in 

 the effective stocking of inland waters. Usually these nurseries con- 

 sist of a pond or series of ponds in which fry furnished by the bureau 

 are held and fed until they reach a large fingerling or yearling size, 

 when thej^ are liberated. Although the bureau retains the right to 

 claim 50 per cent of the output of each cooperating nursery, it has 

 seldom been necessary to exercise that right. 



In addition to the cooperative nurseries maintained by sportsmen's 

 groups, there are many organizations which operate either indepen- 

 dently or rely upon the bureau's assistance merely in an advisory 

 capacity. In some cases cooperative nurseries are maintained and 

 managed by individuals, and in one instance the cooperating party 

 is a county government. The operations of these units result in 

 greatly increased effectiveness in the stocking of public waters. Large 

 fingerling or yearling fish are much better equipped than are fry to 

 survive the conditions encountered in open streams and lakes, and 

 with the increased numbers of large-sized fish available for the pur- 



