1166 



U. S. BUREAU OP FISHERIES 



end of the year. Loch Leven trout eggs to a total of 10,256,500 were trans- 

 ferred to the Bozeman jQeld, 4,007,100 were shipped to applicants, 3,676,200 fry 

 and fingorling fish were planted in Madison Valley waters, and at the end 

 of June, 1930, 50,000 fingerlings were on hand at the station. The total of 

 the above shows an output of 9514 per cent of the eggs collected. 



Glacier Park (Motit.) substation. — From the hatchery in this field 391,700 

 rainbow and 802.150 black-spotted trout fingerlings, together with 70,500 fry 

 and 51,000 eggs of the latter species, were delivered to the Glacier National 

 Park Service for planting in national park waters. The eyed eggs were 

 utilized for stocking distant virgin lakes difiicult of access. Forty-four thou- 

 sand eight hundred golden-trout eggs, received through the courtesy of the 

 California Fish and Game Commission, were planted in Lake Wurdeman 

 near the Canadian border. In addition to the above there remained in 

 liatchery troughs and ponds at the close of the year 476,380 rainbow fry and 

 994,320 black-spotted trout eggs. The facilities at this substation were in- 

 creased during the year by the completion of eight large rearing ponds and 

 the construction and installation of a new battery of troughs. A new water 

 supply was also provided. 



I'iGUHE -. — Taking troiU eggs at a Held egg-collection station 



Miles City (Mont.) suhstation. — This new substation was operated in con- 

 junction with the Montana Fish and Game Commission on an equal share 

 basis. The results were very encouraging notwithstanding the unsatisfactory 

 conditions brought about by the long spell of hot dry weather, which lowered 

 the water level of the lake to such an extent that less than one-half its feeding 

 area was available at the time when it was most needed. The output from 

 this field comprised a total of 274,025 largemouth black bass, crappie, sunfish, 

 and perch. The harvesting of the fish was rendered difiicult by the fact that 

 the middle portion of the lake could not be drained thoroughly, thus entailing 

 a considerable amount of seining which had not been contemplated. In 

 cooperation with the Montana commission, a re.sidence for the caretaker, a 

 Jarge tank and sorting house, and a small garage were constructed after 

 the close of the distribution season. A supply ditch was excavated and an 

 independent pumping plant was arranged. With the view of making this 

 substation a complete and independent pond unit capable of furnishing for 

 car distribution all varieties of tlie pondflshes ordinarily desired, it is planned 

 to construct an additional lake of smaller size than the one now in use 

 for the production of such species as catfish and yellow perch. 



