18 U. S. BUREAU OF FISHERIES. 



approximately 4,000 feet of 18-inch and 16-inch wood stave pipe, 

 which was carried on a trestle from 1 foot to 24 feet high, and 1,250 

 feet of 6-inch pipe to provide water for domestic use and for fire 

 protection. The trestle is made to accommodate a tramcar and 

 makes available for station use an excellent supply of firewood and 

 lumber, also, after the station has been equipped with a sawmill. 

 The work also included repairs to other station buildings and the 

 construction of a new launch. The station is now on an operating 

 basis again, and fish-cultural work will be resumed during 1922. 



During the fiscal year 1920 a system of feeding young salmon 

 that had been in successful operation in the Washington field for 

 some time was tried at the Yes Bay station. An arm of McDonald 

 Lake, locally known as McDonald Slough, was temporarily screened, 

 and a considerable number of young sockeye salmon were placed 

 therein. The fish were fed regularly on salted salmon and made a 

 very excellent growth. The results of the experiment were so satis- 

 factory that pding has been driven to make the feeding inclosure 

 a permanent feature of the station's work. 



BAKER LAKE (WASH.) STATION AND SUBSTATIONS. 

 [J. R. Russell, Superintendent.] 



Necessity for economy has compelled the suspension of fish-cul- 

 tural operations at three of the field stations in the Washington 

 group in the past two years, and this has tended to reduce the output 

 in that region. The combined output of the Washington stations for 

 the fiscal year 1921, exclusive of Quinault, is 36,873,015, against 

 33.086,750 for the preceding year, 20,393,315 of the 1921 figures rep- 

 resenting fingerlings, as opposed to a production of 9,842,350 finger- 

 lings in 1921. 



ISAKEB LAKE (WASH.) STATION. 



Of particular interest in connection with the fish-cultural work in 

 this field was the excellent run of sockeye salmon at Baker Lake. The 

 run began on July 1, when 115 adult fish were taken, and continued 

 to August 13, the peak of the run occurring between July 20 and 24. 

 A total of 7,850 spawning fish were taken. The spawning period ex- 

 tended from October 10 to November 30, About 46 per cent of the 

 total brood stock, or 3,645 fish, proved to be gravid females and 

 yielded 11,750,000 eggs. This is the largest collection of sockeye- 

 salmon eggs oljtained at Baker Lake, exceeding last year's record 

 collection by 600,000. The incubation period was unusually pro- 

 tracted, the first fry appearing on April 1, nearly three months later 

 than in the preceding year, and hatching operations were not com- 

 pleted until May 31. The long incubation season was attributable to 

 low water temperatures, brought about by cold spring weather and 

 late snoAvstorms in the mountains. Apparently there were no ill 

 effects to either eggs or fry, as the loss of eggs amounted to only 3.6 

 per cent, while the fry hatched seemed to possess the usual vigor. 



Though it has not been possible to replace all equipment destroyed 

 by the fire of last year, all of the fry produced were retained in the 

 hatchery troughs to the end of the sac stage, this being effected 

 through the use of the stacked-tray system. There remained on hand 



