REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



69 



opened on November 27, on which date 47,520,000 white-fish eggs were 

 received. Later on 500,000 more were transferred. The eggs were 

 hatched in the Chase and the McDonald jars and produced 30,5rX),000 

 fry, or about 76 per cent of the number of eggs handled. These eggs 

 were green, having been transferred direct from the seining-grounds, 

 consequently the percentage hatched was better than would at first 

 seem. In April the fr}^ were distributed by tugboats in Lake Huron 

 and tributaries, inside a radius of 50 miles from the station. 



The water supply for the Alpena station is pumped from Thunder 

 Bay and is quite clear and pure. When the eggs were first received 

 its temperature was 42°, but by December 13 it had fallen to 34°, 

 where it remained until February, when it registered 33°. In March 

 it ranged from 33° to 35°, and in April averaged 41°. 



On February 15th l,rX)0,000 eyed lake-trout eggs were transferred 

 from the North ville hatchery. They hatched with practically no loss 

 and all of the fry were planted in Lake Huron during April, with the 

 exception of 100,000 deposited in Beaver Lake. The plants were 

 made with tugboats loaned by the fishermen. 



To further relieve the Detroit hatchery it was arranged to transfer a 

 part of the eggs to the State hatchery at Sault Ste. Marie, and 40,732,000 

 were sent to that point in December, January, and March. In De- 

 cember the water was cut off from the hatchery for 11^ hours by 

 the formation of anchor ice and the freezing of the wheels belonging 

 to the electric power compan3^ The eggs were at once placed on 

 flannel trays and the temperature kept down to 34°. No further 

 trouble was experienced, but it is probable that the eggs then in the 

 hatchery were slightly damaged by this accident. The temperature 

 of the water reached 32° by December 24 and remained at 32° until 

 April 13, when it ranged from 33° to 43° until May 1, when the last 

 of the fry were planted. From the eggs transferred 25,000,000 fry 

 were hatched, 10,000,000 being planted in Lake Huron, off Detour, and 

 15,000,000 in Lake Superior and tributaries. 



The Commission is indebted to A. Booth & Co. for transferring fry 

 without expense; also to fishermen at Detour for similar courtesies. 

 The work at this point was under the immediate direction of H. H. 

 Marks, of the Michigan Commission. At the close of the season the 

 hatchery was cleaned up and turned over to the State Fish Commission. 



The following table shows the total number of eggs collected during 

 the year J eggs shipped, and fry distributed: 



Species. 



Eggs col- 

 lected. 



Eggs 

 shipped. 



Fry distrib- 

 uted. 



White-fish 



246,240,000 



15,250,000 



359,035 



50,950 



13,650 



70,000 



24,601,000 

 5,617,000 



163,500,000 



Lake trout 



7,530.000 



Brook trout 



257,500 



Loch Leven trout 



26,000 



8,000 



Raiu bow trout . 



3,000 



GrayUng 





56,000 









Total 



261,983,635 



30,244,000 



171,3^,500 



