PROPAGATION AND DISTRIBUTION OF FOOD FISHES, 1922. 45 



thorities ayrs continued, whereby the bureau's spawn takers are 

 allowed to collect whitefish and cisco eggs in certain Canadian waters 

 of Lake Ontario. Because of the worthless conditions of the boats 

 available, the attempt to collect eggs in the Bay of Quinte was a 

 failure. This is merely a repetition of former yeai-s' experience, and 

 it further demonstrates the necessity of having a suitable boat in 

 order to successfully cover this important field. From all fields an 

 aggregate of 187,420.000 whitefish eggs were secured, of which 126,- 

 3-i9,000 were shipped, in the green stage, to Canada, to New York 

 and Pennsylvania State hatcheries, and to the bureau's substation 

 at Charlevoix, Mich., and central station at Washington, D. C. 



]Many eggs taken and fertilized by fishermen were not secured, for 

 the reason mentioned (the worthless condition of available boats), 

 and for the same reason some 170,000,000 eggs taken by the bureau's 

 spawn takers were planted on the spawning grounds. Of the eggs 

 retained at the hatchery 507,500 in the eyed stage were shipped to ap- 

 l^licants, and the 31,500,000 fry resulting from the remainder were 

 distributed in Lake Ontario, as were also the fry produced from the 

 eggs furnished the New York and Canadian hatcheries. Among the 

 whitefish eggs received from Canadian waters were 2,000,000 taken 

 from fish caught and held in pound nets. These were secured under 

 unusually favorable conditions, and 70 per cent of them were success- 

 fully incubated. Cisco eggs were taken in practically the same 

 waters in which the whitefish operations were conducted, but with 

 Sodus Bay and Fairhaven Bav, N. Y., in addition, the total from 

 all points amounted to 429,900,000. Of these 212,190,000 were 

 planted as green eggs in public waters, or apportioned among the 

 hatcheries of Pennsylvania, New York, Maryland, and Michigan; 

 5,000,000 eyed eggs were delivered to the Michigan Commission, and 

 fry to the number of 47,400,000 were hatched and planted in Lake 

 Ontario. Acting with the consent and advice of the New York 

 Conservation Commission, pound nets were set in Henderson Bay, 

 Avith the view of ascertaining the possibility of obtaining eggs from 

 watei*s closed to commercial fishing, but the results were negative. 



Lake-trout eggs were collected at Pigeon Island, Ontario, and 

 Stony Island, N. Y., as in former years, the total amounting to 

 818,000, from which a 71.7 per cent hatch resulted. Adult yellow 

 perch were collected by the use of trap nets from the St. Lawrence 

 River and carried in tanks in the hatchery until ready to deposit 

 their eggs. From this source 11,655,000 eggs were obtained and in- 

 cubated, and fry to the number of 10,000,000 were hatched and 

 liberated in small baj^s along the river. 



Brook trout and rainbow trout also entered into the distribution 

 from this station, eggs of these species being obtained either by pur- 

 chase or by transfer. Brook-trout eggs to the number of 360,889 

 were received from the bureau's Springville (Utah) station, and 

 288,000 were purchased from the Brookdale Trout Co., of Kingston, 

 Mass. Owing to the development of fungus on the young fish, 

 probably because of impurities in the water supply, the mortality 

 was alarming for a time, but after immersing in a strong salt solu- 

 tion and transferring them to the village water-supply the disease 

 disappeared. 



