REPORT OP COMMISSIONER OF FISH AND FISHERIES. 



11 



iiiglit, wire screens were substituted. While the wire screen did not 

 prevent tlie mud from entering tlie troughs, it stopped most of the 

 parasites. It became necessary about this time to increase the amount 

 of water from 5 to 12^ gallons, as with the smaller amount it was not 

 unusual to find a thin scum of ice over the troughs in the morning. 

 When the feeding of the fish in the jjonds commenced, late in April, the 

 stock consisted of 90,000 landlocked salmon frj^, 19,538 brook trout, 

 10,352 golden trout, 83,257 lake trout, 5,06G rainbow trout, 7,259 Loch 

 Leven trout, 4,892 hybrids; total, 220,361. 



.Arrangements were made to care for the lake-trout fry in troughs in 

 the carpenter shop, the supply of water being taken from the main 

 Hume, but as the temperature rose it was deemed advisable to remove 

 the lake trout and brook trout to a temporary nursery erected a half 

 mile up the mountain side, east of the spawning-house. In j)reparing 

 this nursery it was necessary to place a dam across the brook and to 

 cut a road through the underbrush. The temperature of the water 

 in the hatchery reached 71*^ on May 11, causing a large loss of fry, 

 especially of those that had not absorbed the sac. The rainbow trout 

 suffered such heavy losses that it was decided to deposit the balance (350) 

 in Green Lake, also the 1,000 hybrid Von Behr and landlocked salmon 

 and 3,700 Von Behr and brook. At the close of the month the follow- 

 ing fry were reported on hand: 59,878 landlocked salmon, 14,314 brook 

 trout, G,800 golden trout, and 70,416 lake trout. All of the Loch Leven 

 trout received from Scotland succumbed, owing to extreme heat, not- 

 withstanding the fact that special efforts were made to save them by 

 putting them in the temj)orary nursery. 



The temperature of the water during June was normal, and the 

 losses of fish and fry comi)aratively small. The maximum and mini- 

 mum air and water temi^eratures during the year were as follows: 



July 



August ... 

 September 

 October . . . 

 November. 

 December . 



January.. 

 February 

 March ... 

 April — 



May 



June 



Water. 



Max. 



Min. Max. 



34 



37^ 

 374 

 5l| 

 704 

 78 



33 



32* 



321 



34| 



48i 



624 



Min. 



During winter 50 tons of ice were cut and stored, and repairs were 

 made on the main flume. Considerable work was also done on the 

 roads leading to the station, and a temporary bridge, GO feet long, was 

 built across Great Brook so as to permit of the hauling of wood. 



The experience of the past two years has demonstrated the fact that 

 the temperature of the water at present furnished the hatchery is too 

 high during certain portions of the year for the successful rearing of 

 lake and brook trout, though the landlocked salmon thrive in it. It is 

 therefore recommended that steps be taken to secure the spring which, 

 has been used for supplying the temporary nursery. The water is of 

 standard temperature, 42° F., and its volume is from 50 to 100 gallons 



