Report of the Department of Lands and Forests for 1950 No. 3 



years for renovation and improvement, is in full operation again. It is one of the 

 largest and most modern rearing stations of its kind on the continent. 



Good progress was made in the culture and distribution of the various species 

 of fish reared in our hatcheries. The total output of fish this year was decidedly 

 greater than the output during any one of the three preceding years. Generally speak- 

 ing, the game fish distribution was unchanged during the past few years, but there 

 was a decidedly good increase in the distribution of the commercial fish, notably 

 yellow pickerel. 



Biological Projects 



(a) The creel census which was commenced last year in the Kawartha Lakes 

 area was continued. Intensive studies were made on the maskinonge in its natural 

 environment. 



(b) Studies were made on the establishment of more sanctuaries for small- 

 mouth bass in the Georgian Bay region. 



(c) The creel census was continued in Grey county to determine the propor- 

 tion of hatchery-reared trout in the angler's catch. The specific waters investigated 

 were, Eugenia Hydro Pond. Williams Lake and sections of the Sydenham River. 



(d) The creel census programme was continued on a few waters in the 

 Thunder Bay district. A considerable number of lake trout fingerlings were marked 

 by fin-clipping, prior to their release in Lake Superior (Rossport area) and in two 

 inland lakes, namely, Oliver and Arrow in the Port Arthur district. This project will 

 be continued for a number of years. 



(e) Nets were operated on the following waters for the removal of undesirable 

 species: 



Nonquon River Round Lake Wolfe Lake 



Lake Scugog Marsh Bob's Lake Sand Lake 



Westport Pond 



(f) During the summer months, smallmouth black bass, largemouth black 

 bass and maskinonge adults were distributed in suitable waters from netting 

 operations conducted on the following sites: 



Nogies Creek Little Gull Lake Westport Pond 



Salmon Lake Fox Lake Cook Lake 



(g) Experimental operations were conducted on Trout Lake for the collection 

 of lake trout and ouananiche spawn, and on Lake Bernard for the taking of Kamloops 

 trout spawn. 



(h) Operations for the control of the sea lamprey were continued. A number 

 of weirs were set in selected streams flowing into the North Channel. Further studies 

 of this problem are being continued. 



(i) Small experimental projects were conducted (1) on the Nottawasaga 

 River for assisting rainbow trout over the dam, and (2) on the Thames River for 

 transferring pickerel and bass to the upper river. 



(j) Studies relating to the re-establishing of the Atlantic salmon in Lake 

 Ontario were continued in Duffin Creek at Pickering. 



(k) Further studies were continued on the relationship of commercial fishing 

 and angling in Long Point Bay. This project will be continued for several years. 



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