1146 U. S, BUREAU OF FISHERIES 



water during the spring destroyed this structure, and no fish-cultural 

 work could be carried on during the summer of 1930. At the close 

 of the fiscal year, work had just been started on a permanent dam 

 and ditch which will insure an adequate water supply for ponds 

 to be constructed later. A hatcher}^ building and a combination 

 Avorkshop and garage were completed at the Creede (Colo.) substa- 

 tion, and work was started on a dwelling. This new project hatched 

 a considerable number of trout eggs during the winter and was the 

 base for new field egg-collecting operations in southern Colorado 

 {\nd northern New Mexico. Minor expansion of facilities occurred 

 during the year as is shown in the individual reports. 



FIVE-YEAR EXPANSION PROGRAM 



Final enactment by Congress, during May, of the o-year expan- 

 sion program for the bureau provided for over 30 new or expanded 

 fish-cultural activities. The new hatcheries authorized under the 

 terms of this legislation are located throughout the country in sec- 

 tions which are not easily cared for by the bureau's existing hatch- 

 I eries. While no new work under the authorization of this bill was 

 undertaken during the fiscal year 1930, the matter is mentioned as 

 an indication of the viewpoint of Congress relative to the desira- 

 bility of expanding Federal fish-cultural operations. At the end of 

 the 5 -year period covered by the program the stations and activities 

 of the division of fish culture will have been virtually doubled in 

 number and magnitude. The major part of the development is to 

 be devoted to the interests of game-fish propagation. 



FISH FOOD 



The report for 1929 mentioned an experiment with a prepared 

 trout food made from dried salmon eggs as being under way at the 

 Bozeman (Mont.) station. On the basis of favorable results the 

 experimental trout station at Pittsford, Vt., utilized some of this 

 material, and preliminary findings indicate that it has high value, 

 both in producing growth and in giving the high coloration char- 

 acteristic of wild fish. 



REFRIGERATING PLANT FOR FISH FOOD 



During the year there was installed at the Little White Salmon 

 (Wash.) substation a complete cold storage and refrigerating plant 

 for the purpose of freezing and holding spawned-out salmon car- 

 casses to be utilized as fish food at the Columbia River stations. It 

 is believed that frozen salmon carcasses are more suitable for feed- 

 ing young salmon than those which have been preserved by salting 

 or other methods. In view of the low cost of the raw materials, it 

 is believed that its preservation by refrigeration will provide a 

 cheap and satisfactory food, and that the refrigerating plant will 

 ultimately represent a real economy. 



BLACK-SPOTTED TROUT EGG COLLECTIONS, PYRAMID LAKE, NEV. 



In cooperation with the State of Nevada, Pyramid Lake, which is 

 located on lands belonging to the Carson Indian School, was taken 



