Report of the Department of Lands and Forests for 1950 



No. 3 



County of Grey, on the west, to Gidley Point in the Township of Tiny. County of 

 Simcoe, on the east. Actually, closure was effective from November 11, to the end 

 of the year. The purpose of this closure was the protection of Lake Trout during 

 spawning season. 



Investigations 



During the summer of 1948, a study of the relation of pike to other fish species 

 in the Bay of Quinte Area was carried out. This study was especially concerned with 

 the availability and desirability of the pike in the anglers' catch and with the effect 

 of the commercial catch of this species from the anglers' point of view. 



Angling pressure and commercial fishing pressure were assessed. It is hoped 

 to continue these studies in 1949. 



Investigations were carried out in Northern Inland Waters in an effort to 

 assess the amount of parasitic infestation of whitefish. 



Commercial fishing operations, under close Departmental supervision, were 

 started in Bigstone Bay of Lake of the Woods, in order to determine if fishing 

 pressure against the non-game-fish species would improve the angling in these waters 

 which have been closed to all commercial fishing for many years. 



During the year consideration was given and discussions were held with 

 reference to: 



(1) Readjustment of boundary between the Essex and Kent County line as 

 it affects gill-net fishermen. 



(2) Use of trap-nets in Lake Erie. 



(3) Mesh of gill-nets to be used in Lake Superior for catching Lake Trout. 



rOLLUTION 



Pollution investigations in 194S were limited by the fact that no suitable field 

 men were available for this work. Some investigations were carried out however 

 at the Nation River in Dundas County and Effingham and St. John's Streams in 

 Welland and Lincoln Counties. 



Table No. 22, 



COMPARATIVE STATEMENT OF THE YIELD OF THE FISHERIES 

 OF ONTARIO BY LAKE 



