10 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



During July and August tlie station force was fully occupied in car- 

 ing for the stock on hand. The losses of fry were comparatively small, 

 notwithstanding the high temperature prevailing. The lake-trout fry 

 were moved from the hatchery to Spring Branch in June, but had to 

 be transferred later on to another spring at Eocky Pond, as the first 

 one dried up. On September 8 Mr. Eobinson reported that by actual 

 count there were only 2,0G3 of these fishes left, from which it would 

 appear that lake trout will not stand as high a temperature as the 

 rainbow trout and the landlocked salmon. The landlocked salmon 

 hatched in 1892, which had been held as brood stock, were planted in 

 Green Lake in October, it having been found that the number held was 

 too large for the j)ond space available. During the months of Sep- 

 tember and October the following fishes, resulting from eggs taken the 

 previous fiscal year, were distributed: Landlocked salmon, 128,042; 

 Loch Leven trout, 12,512; Von Behr trout 7,324; brook trout (produced 

 at Craig Brook Station), 6,803; lake trout, 2,500. 



Collection of eggs. — The station being entirely dependent on the cap- 

 ture of fish from the open waters for its supply of eggs of trout and 

 landlocked salmon, arrangements were made in August for the erection 

 of a pound net at Mann Brook for the capture of spawning salmon. 

 The grounds at AVinkempaugh Brook were also inspected, and arrange- 

 ments made for the collection of eggs there, and new j)ens and traps were 

 placed in Great Brook. A force of men was also sent to Branch Pond 

 to conduct operations. The first salmon was taken on September 19 at 

 the Great Brook trap, and by the pound net on September 27. 



The collection of brood fish from all these sources was disappointing. 

 At the close of the spawning season the eggs taken were as follows: 

 Landlocked salmon, 164,000; brook trout, 71,750; golden trout (from 

 Flood Pond), 17,000; square-tailed trout, 2,000; total, 254,750. 



From the brood stock of Von Behr and Loch Leven trout 56,700 eggs 

 were taken during the month of December. These were apparently of 

 low vitality when fertilized, and died before the close of the year. The 

 following table shows the number of eggs received at and transferred 

 from the station during the year : 



Species. 



Sent from Northville, Mich ' Lake trout 



Sent from Dumfries, Scotland, by J. J. Armistead Locli Leven trout 



Sent from Wytheville, Va Rainbow trout 



Sent to Central Station, Washington, D. C I Hybrid landlocked salmon 



i and Von Behr. 



Sent to California Fish Commission, Sisson, Cal Landlocked salmon 



100, 000 

 20, 000 

 15, 000 

 5,231 



10, 000 



The presence of immense numbers of parasites and a quantity of 

 fungus, which made its appearance in February, necessitated the filter- 

 ing of the water. To accomplish this, gravel filters were put in the 

 ends of the hatching troughs and cheese-cloth screens in the supply 

 trough. The cheese-cloth screens were used only during the day, and 

 as they became clogged very quickly and had to be changed during the 



