PROPAGATION AND DISTRIBUTION OF FOOD FISHES, 1925 483 



Green Lake {Me.) substation. — Fish-cultural activities at this point were 

 confined to the collection of eggs from the run of landlocked salmon in Great 

 Brook. In the course of the spawning season (from November 9 to November 22) 

 249 brood fish were taken in the traps placed at the mouth of this stream, and 

 from the 86 females contained in the lot 142,500 eggs of superior quality were 

 secured and forwarded to the main station for development. As no hatching 

 operations were possible, owing to the poor condition of the water-supply flume, 

 the usual spring work in the propagation of smelt had to be omitted. 



St. Johnsbury (Vt.) Station and Substations 

 [A. H. DiNSMORE, Superintendent] 



The main station at St. Johnsbury, and its two auxiliaries at Holden, Vt., 

 and York Pond, N. H., were operated throughout the year. The principal 

 activities at St. Johnsbury and Holden were connected with the production of 

 brook trout for distribution in the advanced fry stage, while at York Pond the 

 work was largely confined to the development of a project to serve as a future 

 source of supply for trout eggs for stocking various hatcheries of the bureau. 



St. Johnsbury (Vt.) station. — Owing to the high summer temperature of the 

 water in Sleepers River, from which stream the hatchery water supply is drawn, 

 this station is not equipped for trout rearing and its work with the Salmonidse 

 is limited to the production of fry for distribution just prior to the feeding stage. 

 In the course of the year the station handled 500,000 eyed brook-trout eggs 

 purchased from commercial fish-culturists, and, in pursuance of a cooperative 

 arrangement with the owners of Darling Pond, Vt., approximately 742,000 brook- 

 trout eggs collected in that body of water and transferred to the station without 

 expense to the bureau were incubated on shares, the station receiving one-third 

 of the resulting fry and turning back two-thirds to the owners. In addition 

 to the above 400,000 eggs of this species, the property of two fish and game 

 clubs of the region were incubated and the resulting fry placed at the disposal 

 of the clubs to be planted by them in certain public waters. Small numbers of 

 eggs of the landlocked salmon, steelhead salmon, and lake trout were also 

 hatched and the product distributed to applicants of the bureau. 



Holden (Vt.) substation. — Fish-cultural work at this point began with the col- 

 lection of lake-trout eggs in Lake Dunmore in cooperation with the State of 

 Vermont. The spawning period extended from October 24 to November 9, and 

 312,500 eggs were secured. On reaching the eyed stage 50 per cent of these were 

 turned over to Vermont and about one-third of the remaining 50 per cent were 

 forwarded to the St. Johnsbur.y hatcherJ^ The remainder were incubated at 

 Holden. Approximately 569,000 brook-trout eggs were handled during the 

 season, including a lot of 200,000 purchased at the expense of a local fish and 

 game association. The fry hatched from this lot were turned back to the asso- 

 ciation for liberation in public waters of the region. 



York Pond {N. H.) substation. — The development work which has been in 

 progress for several years in this field was continued as other operations would 

 permit. The diversion ditch carrying water from Cold Brook through Sky 

 and Bog Ponds into York Pond was enlarged so that it will now carry the entire 

 normal flow from the brook. Work on the West Branch diversion ditch, begun 

 in late November, was prosecuted as continuously as possible. Eventually this 

 ditch will bring the West Branch water into York Pond through a swamp, which 

 will form another pond about 5 acres in area. A water wheel designed by the 

 bureau's architect and engineer was constructed and placed in position for opera- 

 tion, and a dynamo and transmission lines capable of furnishing sufficient power 

 to light the station buildings and operate small machinery were installed. 



During October and November 1,249 female brook trout were captured and 

 spawned, yielding shghtly more than 437,000 eggs. Approximately 69,000 of 

 these were transferred in the eyed stage to the Holden substation, and from the 

 remainder upward of 144,000 fry and fingerling fish were produced and dis- 

 tributed. 



Nashua (N. H.) Station 



[W. F. Hubbard, Superintendent] 



There was no departure from past methods in the conduct of fish-cultural work 

 at this station. The total output of fingerling fish, amounting to approximately 

 470,000, was divided as to species among the brook, rainbow, lake, and Loch 

 Leven trouts and the landlocked salmon. The station also incubated 1,000,000 



