LVIII REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



and died. Fifty adults were then collected from the Maquoketa Eiver 

 and placed iu Pond X, but they were captured too late in the season to 

 spawn. 



On March 9 unusually liigli water in the spring branch flooded the 

 lowlands east of the superintendent's residence. The water rose a foot 

 above the floor of the wagon bridge, doing considerable damage to the 

 stone abutments aud causing numerous washouts along the pond site. 

 The water supply to the hatchery and ponds was cut off by the wash- 

 ing out of the 14 inch pipe, but the eggs and fry were saved by promptly 

 repairing it. Later in the season considerable work was done with the 

 view to protecting the supply pipe and ponds from damage by future 

 freshets. Owing to changes in the plans and to damage done by the 

 freshet and the cyclone of the previous year, the appropriation for the 

 construction of tlie station proved inadequate, hence work had to be 

 stopped in the spring, pending an additional appropriation of $4,200, 

 submitted in the deficiency bill. 



DuLUTH Station, Minnesota (S. P. Wires, Superintendent). 



Early in the summer the usual arrangements were made for collecting; 

 lake-trout and whitefish eggs from the waters of Lake Superior. The 

 lake-trout season commenced September 15 and closed November 7, 

 resulting in a collection of 5,874,000 eggs from the following points: 

 Eoss Port, Ontario, 2,203,000; St. Ignace Island, Ontario, 800,000; Isle 

 Eoyale, Mich., 1,701,000; Grand Portage, Minn., 410,000; French Eiver, 

 Minn., 40,000; Bayfield, Wis., 090,000; Pueblo Eiver, Ontario, 30,000. 

 They were transferred to the station and 4,768,000 fry were hatched 

 from them and distributed during April, May, and June. 



The whitefish collections commenced at Basswood Lake, Minn., on 

 October 17 and the total take of eggs during the season amounted to 

 4,200,000. The loss during incubation was very heavy, owing partly 

 tounfavorable weather conditions which prevailed during the collecting 

 season and jjartly to the fact that it was necessary to transport the 

 eggs long distances over rough roads by wagon from the fishing-grounds 

 to the railroad station. As the result of the season's work 1,990,000 

 fry were deposited at Grace Harbor, Isle Eoyale, Michigan, on April 29. 



In addition to the collections made by the station force 25,000 brook, 

 21,450 rainbow, and 100,000 steelhead trout eggs were transferred from 

 other stations to be hatched and distributed from Dulutli. The brook- 

 trout eggs yielded 15,400 fry, which were furnished to applicants in 

 Minnesota and North Dakota during May and June. The rainbow 

 eggs were in excellent condition when received, but they proved almost 

 a total loss, probably because of the difference in the temperature of 

 the water at Neosho, where they were eyed, and Duluth. The tem- 

 perature at Duluth during the hatching j^eriod was below 34° F., whereas 

 at Neosho it is 57°. The steelhead eggs produced 75,000 fry, which 

 were deposited during July iu tributaries of Lake Superior. A number 

 of specimens of that species have been captured in French and Lester 



