70 REPORT OF THE Xo. 3 



Algonquin Park 



Studies of plankton in Algonquin Park in artiticialh' fertilized and un- 

 fertilized lakes. 



Studies of water temperature and chemical content of water in relation to tish. 



Creel census. 



Thunder Bay and Fort Frances Area 



Netting of coarse fish from certain lakes in Sible>- Peninsula to iiscertain 

 effect on game fish population. Introduction of bass and other game fish to 

 suitable lakes in the same area. 



Creel census to determine catch of \arious species. 



5. — Wildlife Studies 



This project under Mr. Diivid Fowle was mainly carried on in Algonquin 

 Park. The principal aim was to devise a satisfactory method of assessing small 

 mammal, particularly rodent populations, and determining their effect on and 

 response to the forest environment. 



6. — Valuation of Effect of Smelter Fumes on Forest Growth. 



This is a continuation of the survey started in 1944 to determine the extent 

 and degree of the forest damage caused by smelter fumes. Sampling by airplane 

 in the air and on the surface of lakes was continued and new automatic recorders 

 were set up. 



7 — Building and Mechanical Electrical Development 



During the year, a fisheries research building, incorporating the unique 

 "artificial lake", was almost completed and a well giving 200 Imperial gallons 

 per minute to supply water for this project was completed. This artificial lake, 

 which is a cylindrical enclosed tank, will have provision made for refrigeration 

 or warming, or addition of oxygen and other gases so that the effect of any of 

 these factors on fish ma>- be studied. The results when applied to fish planting 

 and other practical projects should be valuable. 



The mechanical section produced an infra-red cone dr\er for tree seed 

 production. 



The section also manufactured an aerial seeder for use in reforesting burned 

 areas from the air and a machine for applying coatings, containing fertilizers, 

 fungicides, rodent repellents, etc., to the seed to increase chances of survival. 



A power pruner for count}- forests was also made to order for the Division 

 of Reforestation. 



