PROPAGATION AND DISTErBTJTION OF FOOD FISHES, 1925 479 



were obtained in the fall of 1924 at an average cost of 7 cents per 1,000. Among 

 the most prolific is the property known as the Engelbrecht Lakes, consisting of 

 two inclosures of 50 and SO acres, fed by a small creek. While egg collecting is 

 in progress the owner of these lakes furnishes board and lodging to the bureau's 

 spawn takers and receives as his part of the proceeds 30 per cent of the eyed 

 eggs and fry. 



The Moiint Massive Trout Club holdings comprise a group of 20 lakes, ranging 

 in area from 1 acre to 18 acres, the series being fed by a ditch leading from a 

 neighboring creek. The work here is conducted on an eciual share basis. A 

 third collecting point is Turquoise Lake, a reservoir of approximately 800 acres 

 owned bj' the Colorado Fuel & Iron Co. Due to the fact that this lake was 

 drawn down about IS feet below its normal level during the fall of 1924, laying 

 bare the usual spawning area, there was a falling off in output of more than 

 half a million eggs as compared with the results of the preceding year. Collecting 

 projects of smaller extent are Carroll Lakes, two inclosures having a combined 

 area of 20 acres, controlled by the Colorado Springs Fly-Casting Club, and a 

 series of four, known as Wurtz Lakes, ranging in size from 1 to 5 acres. 



In addition to the collections mentioned the station received 1,266,000 eggs 

 from a privately owned fish-cultural establishment at Creede, Colo. In this 

 case the owner of the plant made the collection of eggs at his expense, and in 

 return for 50 per cent of the developed eggs the station assumed the care of the 

 entire lot to the ej'ed stage and packed the owner's share for shipment to points 

 directed by him. 



In the course of the year the station acquired 162,200 rainbow-trout eggs, 

 collected in Baker Lake, near JeiTerson, Colo., and from the Evergreen Lakes on 

 the station grounds. Eyed eggs of this species were also received from the 

 bureau's Springville (Utah) and Saratoga (Wyo.) stations. From a consignment 

 of 814,000 eyed black-spotted trout eggs, received from the Yellowstone Park, 

 801,000 No. 1 fingerling fish were produced and distributed. The station also 

 handled 75,000 eyed lake trout eggs transferred early in March from the Duluth 

 (Minn.) station. 



Yellowstoxe National Park (Wyo.) Substation 

 [C. F. Culler, in charge] 



The collections of eggs of the black-spotted trout in this field during July, 1924, 

 amounted to 19,522,500. These were eyed in the bureau's hatchery near Lake 

 Hotel, together with 12.477,500 taken earlier in the season. The unusually 

 small water supply available for incubation work making it hazardous, if not 

 impossible, to complete the development of this large stock, it was decided to 

 utilize eyed eggs in larger numbers than heretofore for stocking the more 

 distant and inaccessible waters of the park, especially since close observation had 

 disclosed encouraging results from previous plants of eggs. No available means 

 exist for transporting fry in large numbers to such waters, and even where the 

 waters to be stocked are accessible by boat an excessive amount of time is 

 involved in making the plant. Taking into consideration the number of streams 

 where eggs are collected, it is estimated that fully 20 days would have been 

 necessary to carry out the bureau's policy of returning to parent waters 25 per 

 cent of the fry resulting from such collections, whereas the time spent in making 

 this return in the form of eyed eggs did not exceed 4 days. Approximately 45 

 per cent of the product of the eggs collected was planted in the waters of the 

 park either in the form of eyed eggs or as advanced fry. The remainder of the 

 output, consisting of eyed eggs, was shipped to applicants and to other stations 

 of the bureau. 



Unusually high water obtained in all the park streams in the following spring 

 from the time the station was opened — about the middle of May — up to the 

 close of the fiscal year. This condition and the fact that ice-cold water in large 

 quantities was flowing into the streams from adjacent mountains made a rather 

 discouraging outlook for egg collections. 



Saratoga (Wyo.) Station 



[O. N. Baldwin, Superintendent] 



Brook-trout operations were conducted as usual. Part of the 318,000 finger- 

 lings of this species carried over from the hatch of the preceding year were dis- 

 tributed to applicants in the course of the summer, and the remainder was turned 



