FISHERY INDUSTRIES. 



25 



in Alaska are required to make affidavit of the number of salmon fry 

 released in each fiscal year ended June 30. The following table sets 

 forth the rebates due for the fiscal year ending June 30, 1917: 



Rebates Credited to Private Salmon Hatcheries During the Fiscal Year 

 Ended June 30, 1917.a 



a In the case of hatcheries where the seasonal distribution of fry is not completed before July 1, the re- 

 maining fry are shown in the subsequent fiscal year's report. 



HATCHERY INSPECTION. 



Inspections in respect to the operations of private hatcheries in 

 Alaska were conducted as usual by representatives of the Bureau. 

 In a general way, operations were conducted along satisfactory 

 lines. Additional facilities for rearing salmon fry are required at 

 practically all of the hatcheries in Alaska. 



HATCHERY OPERATIONS. 



Between September 1 and October 2, 1916, at which latter date egg 

 taking ceased at Yes Bay, a total of 58,000,000 red-salmon eggs were 

 secured. In October of that year 2,000,000 eyed eggs were trans- 

 ferred to the station of the Oregon Fish Commission at Bonneville. 

 Hatching was completed at Yes Bay on April 15, 1917. In the 

 period from December 18, 1916, to August 3, 1917, there were 

 51,175,000 young salmon released. These plants consisted of 

 49,600,000 fry and 1,575,000 fingerlings. They were deposited in 

 Yes River, Hatchery Creek, and Lake McDonald. The losses were: 

 Eggs, 4,691,000; fry, 129,000; and fingerlings, 5,000; a total loss at 

 Yes Bay of 4,825,000, or 8J per cent. On account of inadequate 

 facilities for holding fry to the free-swimming stage, many were lib- 

 erated in the sac stage. Feeding on salt salmon began in June and 

 continued until the supply was exhausted. 



Egg taking in 1917 began on September 11 and ended September 26, 

 during which period 34,950,000 red-salmon eggs were taken. 



A patrol of Yes Bay was maintained as in seasons past to prevent 

 commercial fishing in waters frequented by salmon headed for the 

 hatchery stream. 



In 1916 the take of red-salmon eggs at Afognak wa^ 17,044,000. 

 This collection was augmented by the transfer of 681,000 eyed eggs 

 from Uganik, 4,600,000 from Seal Bay, and 1,016,000 f -om Karluk. 

 From this total o: 23,341,000 the; were planted in the period from 

 October, 1916, to July, 1917 10,956,000 fry and 10,160,000 red- 

 salmon fingerhngs, a total of 21,116,000 young salmon. The loss of 

 eggs and fry was 2,225,000, or approximately 9^ per cent. 



