344 X-". s. BUEEAi: or fisheeies 



The bureau has also cooperated with the Department of Agricul- 

 ture and the Department of the Interior. Heavy assignments of 

 fish have been made to the waters of many of the national forests, 

 under control of the former, and the bureau deems this feature an 

 important part of its duties. The relations with the Interior De- 

 partment in the conduct of fish-cultural operations in Glacier and 

 Yellowstone National Parks have been mutually helpful. A new 

 hatchery building is being laid out in the Yellowstone Park, and the 

 facilities in that reservation are being further augmented b}^ the 

 construction of rearing ponds at Mammoth Springs. Generous 

 assignments of trout fingerlings for Rainier National Park have 

 been made possible by the willingness of certain game commissioners 

 of the State of Washington to rear the fish at their hatcheries. The 

 bureau has also made plants of fish in waters under the control of 

 the Reclamation Service and the Irrigation Service. An interesting 



Figure 1. — Cooperative fish hatchery at Barneveld, N. Y. 



feature has been the supplying to the Chemical Warfare Service of 

 thousands of tadpoles for experimental work. 



Cooperation with private individuals and organizations has largely 

 consisted in work with rearing pools and nursery ponds. There ap- 

 pears below a tabulation of this activity showing the number of 

 nurseries in operation, their geographical distribution, and the num- 

 ber of fish assigned. In addition to the two complete hatchery units 

 conducted by a detached employee of the bureau, which were in 

 operation last year, a new establishment of a similar nature was 

 opened near Windber, Pa. The work has been extended to several 

 other States, including Virginia, Massachusetts, and New Jersey. 

 There has been an increase from 55 to 86 in the number of nurseries 

 established by the bureau during the past j^ear. A number of sites 

 that proved to lack proper conditions were inspected, and some 

 sites that were approved have not yet been developed. Advice and 

 suggestions relative to all phases of the nursery pond have been given 

 freely, and in some cases, based upon this information, nurseries have 

 been constructed and operated in conjunction with certain of the 



