674 U. S. BUREAU OF FISHERIES 



CRAIG BROOK (ME.) STATION AND SUBSTATION 



[George N. Montgomery, Superintendent] 



The record production of 4,085,600 brook trout eggs secured from the station 

 brood stock during the year necessitated the transfer of over a million eyed eggs 

 to other stations. A large number of the fish resulting from the retained eggs 

 were distributed as Nos. 1 and 2 fingerlings, and 268,800 fingerlings were on hand 

 at the end of the year. The 118,400 fingerling brook trout and 73,966 land- 

 locked salmon fingerlings carried over from the stock of the previous year were 

 delivered to applicants. Additional landlocked salmon eggs numbering 700,000 

 were received from the bureau 's Grand Lake Stream auxiliary and from the State 

 of Maine. Transfers of eyed eggs were made to the Grand Lake Stream sub- 

 station, to the York Pond (N. H.) station and to the Bozeman (Mont.) station. 

 Fingerlings resulting from the retained stock to the number of 295,400 were 

 liberated and 132,000 were on hand at the close of the year. 



During the year the capacity of the hatchery was increased by the building 

 of additional ponds. A new piping system for the hatchery troughs was installed, 

 and numerous repairs were made to the station equipment. 



Grand Lake Stream (Me.) substation. — Of the stock on hand at the opening 

 of the year 255,355 landlocked salmon, brook trout, and Atlantic salmon from 

 1J>^ to 3 inches long were distributed. The Atlantic salmon were distributed in 

 conjunction with distribution work conducted by the State of Maine. The fall 

 collection of landlocked salmon eggs numbered 1,241,715. Of these 668,840 

 were shipped in the eyed stage to other stations. This substation received from 

 the main station at Craig Brook 75,000 landlocked salmon eggs, 200,000 brook 

 trout eggs, and 200,000 Atlantic salmon eggs. In the latter part of the year 

 365,000 fingerling fish were distributed and at the end of June, 1931, 413,990 

 fingerlings were being carried in the station ponds. The only construction work 

 accomplished consisted in minor repairs and improvements, including the paint- 

 ing of the hatchery and other buildings. 



ST. JOHNSBURY (VT.) STATION AND SUBSTATION 

 [A. H. DiNSMORE, Superintendent] 



Except for the resumption of activities with the smallmouth black bass, the 

 fry of which were collected from open waters and transferred to the station ponds 

 for rearing, the work of the St. Johnsbury station was conducted along the same 

 lines as in past years. Fry to the number of 1,424,529 were produced from a 

 total of 1,509,062 eggs, of which 1,327,349 were brook trout. The remainder 

 were Loch Leven trout and landlocked salmon and steelhead salmon in nearly 

 equal numbers. Owing to the unsuitable nature of the station's water supply 

 for the production of fingerlings, the majority of the fish hatched were distributed 

 as fry, though a few fingerlings of the three last-named species were on hand at 

 the close of the year. 



York Pond {N. H.) substation.— The main purpose of the w:ork in this field is 

 the production of brook trout eggs from carefully selected brood stock held under 

 semiwild conditions. During the fall of 1930 a total of 7,277,933 eggs of that 

 species were collected, this number representing an increase of approximately 

 50 per cent over the collection of the preceding year. As a by-product the station 

 produced 330,750 unfed fry, 288,400 fingerlings, 72 yearhngs, and 1,240 adult 

 brook trout. Some of these were supplied to applicants and the remainder were 

 planted in public waters in northern New England. An attempt to handle 

 landlocked salmon resulted in almost complete failure. Apparently the very 

 favorable natural conditions existing at the station for brook trout propagation 

 are in some way inimical to the salmon. This theory seems to accord with the 

 fact that brook trout and landlocked salmon are rarely found together in a wild 

 environment. 



The availability of a special appropriation of $25,000 permitted the continuance 

 of development work at the station during the year. The funds were utilized 

 in the purchase of a gasoline excavator, in improving the station well, canal, 

 and pond systems, and in the construction of permanent buildings to take the 

 place of the temporary buildings used since the inauguration of the bureau's 

 fish cultural work in this field. Cement blocks, made at the station, are being 

 used in the construction work, together with lumber manufactured from logs 

 cut on the reservation. 



