20 DEPARTMENT OF GAME AND FISHERIES No. 9 (1941) 



Temporary and subsidiary ponds were constructed in the vicinity of Brighton, 

 Northumberland county, to accommodate surplus trout during the fry and fingerling 

 stages. 



The Belleville fish hatchery was dismantled since the operations conducted 

 there can be carried out more economically and effectively at the Glenora fish hatchery, 

 by making use of the Belleville equipment. 



The construction of ponds for bass propagation is of very great value by sup- 

 plementing the work of nature in maintaining this very desirable game fish. Three 

 additional ponds were used for bass propagation at the Sandfield station, Manitoulin 

 Island, five at the Skeleton Lake station, Ullswater, Muskoka district, and one in the 

 vicinity of Havelock, Peterborough county. Nine of these ponds were used for wintering 

 trout fingerlings for distribution as yearlings the following spring. 



A hatchery and pond located at the outlet of Deer Lake, vicinity of Havelock, 

 Peterborough county, were successfully used for the first time for the propagation of 

 maskinonge, in conjunction with a minnow forage pond. In addition to this, a suitable 

 area comprising approximately ten acres was set aside on Stoijy Lake, Peterborough 

 county, for the purpose of studying in an experimental way the conditions required 

 for the successful production of maskinonge in natural areas. 



THE CULTURE AND DISTRIBUTION OF FISH 



Generally speaking, excellent progress was made in the culture and distribution 

 of the various species of fish handled. In this regard particular mention is made 

 of speckled trout, brown trout, small-mouthed black bass, maskinonge and yellow 

 pickerel, since the year's distribution of these species surpassed all previous records. 

 For the first time in the history of the Department, maskinonge were reared to sizeable 

 fingerlings by the pond method. 



Speckled Trout: 



The following statistics indicate the success being achieved and the progress 

 made in regard to the culture and distribution of yearling and older stages of this 

 important native fish. 



1936 563,351 



1937 1,183,223 



1938 2,087,990 



1939 2,982,874 



In 1939, three hundred and thirty-seven thousand fingerlings were also dis- 

 tributed^ The distribution of fingerlings is undertaken if the number on hand cannot 

 1)6 accommodated in the hatcheries. 



Brown Trout: 



During the year, 375,070 yearlings and 29,954 fingerlings were planted in suit- 

 able streams in southern Ontario. The number of yearlings planted was more than 

 six times that of the previous year. A comparatively small number of fingerlings 

 were also planted. The result of the distribution of brown trout on the fishing in 

 streams of southern Ontario is most encouraging. 



EaJnbow Trout: 



(a) Steelhead trout 



Good progress was made in regard to the rearing of rainbow trout yearlings; 

 an increased production of 244 per cent was obtained as compared with that of the 

 previous year. 



