36 V. S. BUREAU OF FISHERIES. 



The collectinp: operations for both hike trout and whitefish were 

 conducted in American and Canadian waters under the same co- 

 ojjerative agreement that was effective last season. In Canadian 

 waters the work was handicapped by hick of a suitable boat, making 

 it necessary to plant on the spawning grounds immediately after 

 fertilization 29.650.000 of the eggs taken at Deseronto and Big 

 Island. Canadian hatcheries received 30,000,000 of the eggs ob- 

 tained, in accordance with the terms of the agreement; 29,300,000 

 were turned over to hatcheries of the New York Conservation Com- 

 mission and 1,000,000 were diverted to the Washington exhibit. 

 The remainder were incubated at the Cape Vincent station and the 

 resulting fry planted in Lake Ontario waters. Egg collections of 

 cisco (lake herring) from Ontario waters totaled 317,200,000, of 

 which 73,200.000 were obtained in Canadian waters at Deseronto and 

 Bygotts Point, The fisheries authorities of Pennsylvania and New 

 York received 104,410.000 and 65,000,000, respectively; 17,100,000 

 fertilized eggs were planted on the spawning grounds, and the fry 

 hatched from the remainder were returned to Lake Ontario waters. 



During the spring a small number of brood yellow perch were 

 obtained from trap nets set in the St. Lawrence River, and from the 

 15,000,000 eggs thus secured 11,000,000 fry were hatched and re- 

 turned to the St. Lawrence River. A consignment of 8,000,000 eyed 

 pike-perch eggs received from the Lake Champlain hatchery yielded 

 for distribution 7,970,000 fry of excellent quality, an usually high, 

 percentage. In addition to the commercial species enumerated 

 150,000 rainbow-trout eggs from the bureau's Virginia station and 

 approximately 450,000 brook-trout eggs from commercial dealers 

 were incubated and the fry distributed to applicants in New York 

 State. 



A boat suited to the needs of the station was obtained by transfer 

 from the Navy, but because of the time consumed in making needed 

 repairs to motors was not available for service during the past 

 season. When fully equipped, this boat will add much to the pro- 

 ductivity of the station, being particularly valuable in connection 

 with the whitefish and cisco work in Canadian waters. 



SWANTON ( VT. ) SUBSTATION. 

 [A. H. DiNSMORB, Superintondcnt.] 



The work at this point is conducted cooperatively with the State 

 of Vermont. During the operating season of 1921, extending from 

 March 2 to May 10, pike-perch eggs to the number of 112,312,500, 

 also 43,950,000 yehow-perch eggs, were secured for incubation. The 

 winter being unusually mild, the Missiscjuoi River was open at an 

 early date. Nets were set during the first part of March and hauled 

 at frequent intervals at the various i)oints to anticipate the i:)resence 

 of fish. The first pike perch were taken at Sandy Point March 25 and 

 at Campbell's on April 4. Three trap nets were in operation at the 

 mouth of the river, but the results from their use would not appear 

 to warrant their continuance. All fish taken were immediately trans- 

 ferred to the inclosure for ripening, but because of low water stages, 

 resulting in an improper circulation of water through tlie inclosure, 

 the mortality was high, and all brood fish on hand were released on 



