ment and the Canada- United States Great Lakes Fishery Commission in measures 

 to control the sea lamprey invasion of the Great Lakes. Recent studies have 

 given most definite indications that the abundance of smallmouth bass is dependent 

 on water temperatures during the hatching year; not on the number of spawning 

 fish. 



The major activity in physics research continued to be a study of the 

 physical characteristics of the Great Lakes. Monthly synoptic surveys similar 

 to those conducted previously in Lake Huron and Georgian Bay were made in Lake 

 Erie, in co-operation with United States agencies. Smaller-scale surveys were 

 made also in Lake Ontario and Lake Simcoe. 



The most important undertaking in wildlife research was the experimental 

 study of methods of censusing moose from the air, carried out during the winter in 

 central Ontario. The availability of a helicopter made possible the first accurate 

 checks of census figures collected by observers in Beaver aircraft. Investigations 

 of beaver, formerly confined to the summer season, were expanded to cover the 

 full year, making winter trapping operations possible. 



Mathematical statistics is steadily assuming a more important place in 

 the work of the department. The services in mathematical design and analysis 

 provided by the competent statistician who has been employed by the department 

 for the past eight years has greatly improved and accelerated research experi- 

 mentation. The next forward step will be the greater use of machine computation, 

 as delays in analyzing data are no longer permissible. 



More detailed accounts are given of the foregoing and other projects in 

 the text in the following pages. 



One of the most important functions of the Division of Research is to 

 obtain the greatest possible co-operation from other research agencies which 

 are attempting to solve the problems of resource management in Ontario. While 

 a number of formal agreements are effective between the Research Division and 

 federal government and other agencies, it is necessary that joint committees 

 constantly review programs. 



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