46 U. S. BUREAU OF FISHERIES. 



In the incubation of these eggs considerable difficulty was ex- 

 perienced from the presence of a parasitic or fungoid growth, which 

 interfered with the proper separation of the dead from the living 

 eggs. As the season advanced the eggs became so coated with this 

 hairlike formation that the}' would not lie together closely in a 

 uniform mass but were more or less suspended in the water current. 

 To overcome this tendency the jars were taken down and the eggs 

 screened and washed. This improved matters for a short time, but 

 within a few days the treatment had to be repeated. This constant 

 screening and washing, which had to be resorted to throughout the 

 incubation period, not only involved much additional labor but it 

 is believed also to have increased the percentage of mortality. 



Cisco eggs to the number of 76,800,000 were collected between 

 November 22 and December 9 in Fairhaven, Sodus, and Chaumont 

 Baj^s, in New York waters, the first-named bay furnishing the bulk 

 of the collections. Although the catch of cisco by commercial fisher-^ 

 men during the summer and early fall was above the average, for 

 some unexplained reason the take during the spawning season was 

 far below normal and egg collections were correspondingly reduced. 

 On the development of the eggs to the eyed stage a shipment of 10,- 

 000,000 was furnished to the Michigan Department of Fisheries, and 

 from the remainder 39,000,000 fry were hatched and distributed on 

 the spawning grounds in Lake Ontario. Part of the losses on these 

 eggs was due to the fungoid growth referred to in connection with 

 the whitefish work. 



During the winter the station received 553,000 brook-trout eggs 

 from commercial hatcheries and distributed the product in the fry 

 stage. A very satisfactory percentage of hatch was attained and the 

 resulting fry did well up to the early part of April, when a weakness 

 developed. Grouped together the young fish presented a whitish 

 cast, and under the magnifying glass patches of mold or fungus 

 became apparent. All except the more badly affected ones were 

 restored to normal condition by applying a salt bath and then plac- 

 ing them in a village water supply. 



In the course of the year the station received and hatched 100,000 

 eyed rainbow-trout eggs received from the Michigan Department of 

 Fisheries, and 1,500,000 pike-perch eggs transferred from the Put 

 in Bay (Ohio) hatchery. Under permit from the New York Con- 

 servation Commission several hundred brood yellow perch were cap- 

 tured in the St. Lawrence Kiver and from them 1,000,000 eggs were 

 collected, the adult fish being returned to the river at the end of the 

 spawning season. The eggs were incubated in sunken wire baskets 

 and the resulting fry were returned to the local spawning grounds. 



BRYANS POINT (MD.) SUBSTATION. 

 [I>. G. Harkon, Supeiintendent.] 



Between the 4th and the 18th of March a total of 17,999 brood 

 yellow perch was collected and installed in live cars near the Bryans 

 Point station to serve as a source of egg supply for the hatchery. 

 The fish spawned daily from March 18 to March 30, yielding 146,- 

 560,000 eggs, of which 9,165,000 were shipped, one consignment of 

 7,800,000 going to the Neosho (Mo.) station and the remainder being 



