ANNUAL REPORT, 1944-45 29 



County of Dundas. 



SILVER CREEK 



Located on Lot 22, Concession 2; Lot 21, Concession 2; W.H. Lot 21, 

 Concession 1, Lot 22, Concession 1, Lot 23, Concession 1, Township of 

 McKillop, and Lot 9, Concession 1, Township of Tuckersmith, 

 County of Huron. 



Part of Little Thessalon or Bridgland River located between what is known as 

 RESERVE DAM and McCREIGHT'S DAM, both in Township of Kirkwood, 

 Algoma District. 



BIOLOGICAL SURVEYS 



Biological surveys were conducted on — 

 Twelve Mile Creek, Lincoln County; 

 Welland River and Canal, Welland County; 

 Walker's Pond, Middlesex County, and 

 Belwood Lake, Wellington County. 



The Grand River was examined near Dunnville regarding the need for fish- 

 ways in order that pickerel might have access to the reaches of the river above 

 the dams at Dunnville. 



Streams in the vicinity of Caledon were studied as to their possibilities 

 as hatchery sites. 



The following waters were examined for evidence of pollution and for 

 other causes of fish mortality. 



1. River between Sturgeon Lake and Pigeon Lake at Bobcaygeon. 

 Pollution by domestic sewage evident, but it had no noticeable effect 

 on fish life. 



2. Beardmore Creek at Acton — Tannery wastes. 



3. Duffin's Creek near Pickering — Treated domestic sewage. 



4. Sandy Lake, Peterborough County — Some fish mortality but the cause 

 was not determined. 



5. Grand River near Kitchener — Domestic and trade wastes. 



6. Nith River near New Hamburg — Domestic Sewage. 



7. Lake Ontario off Peel and Halton Counties — Persistent oil slick on the 

 water in this area. 



The Ontario Fisheries Research Laboratory of the Department of Zoology, 

 University of Toronto continued the studies of fisheries in the Provincial parks and 

 other waters of the Province. Financial assistance and cooperation making this 

 work possible was received from the Ontario Department of Game and Fisheries, the 

 National Committee on Fish Culture, the University of Toronto, and for work with- 

 in the parks, the Ontario Department of Lands and Forests. 



