[11] OPERATIONS AT NORTHVILLE AND ALPENA. 



Shipments of lake-tront eggs — Continuetl. 



161 



Shipments of lake-trout fry. 



Date. Number. 



Delivered to — 



1885. 

 Apr. . 18 

 23 



M.Ty 



Juuo 



Total.. 



25, 000 

 15, 000 



65, 000 



Mr. Bassett, Tpsilanti, Mich. 



Shipped in charge of car No. 2, and planted in Loon Lake, near Flint and Pore 



Marquette Railroad, Northern Michigan. 

 J. Elyea, Lawton, Mich. 

 Agent of N. S. Woodward, Plymouth, Ind. 

 Asent of J. C. Eowle, Michigamme, Mich. 

 Planted in Long Lake and Huron River, near NorthviUe, Mich. 



THE GRAYLING. 



Having no exact data as to the spawning grounds and the time of 

 spawning of the grayling, the work of taking eggs was Targely experi- 

 mental. Taking these and numerous other difficulties into considera- 

 , tion, the experiment maybe considered as fairly successful. Twenty 

 thousand prime eggs were taken, 12,000 on April 18 and 8,000 on April 

 24. Five thousand eggs were shipped to Central Station, Washington, 

 April 27, and from ten to twelve thousand hatched. Those taken on 

 April 18th hatched May 2 to 5 ; the others. May 12 to 14 ; period of in- 

 cubation, 14 to 20 days; temperature of water, 50° to 62°. Although 

 very successful with the hatching, we were unfortunate with the fry, 

 fully 90 per cent of them dying within tAVO weeks. Most of them refused 

 to take food. The few hundred, however, that pulled through have 

 since done remarkably well, and are now (September 15) twice the size 

 of trout of the same age. 



The grayling yields from two to six thousand eggs, according to size. 

 The spawning season was probably later than usual this season, owing 

 to the severe winter and backward spring. 



Our operations were conducted on the Manistee and Au Sable Elvers, 

 Northern Michigan. Three men were stationed on the Au Sable, 18 

 miles east of the village of Grayling, and two men on the Manistee, 12 

 miles west of Fredericville, moving down stream, later on, to a point 

 about 12 miles west of Grayling. There were still 4 feet of snow in the 

 forests when operations were begun, and it had not wholly disappeared 

 H. Mis. G8 11 



