16 



THE REPORT UPON 



No. 36 



be much easier than they are to-day. Life history studies form a part of the 

 schedule of studies of fisheries' research departments of our universities. 



During the past year the work of the investigators was organized according 

 to districts which are supervised by District Superintendents. 



The number of waters investigated in the Province to date from the stand- 

 point of their limnobiology and suitability for fish of various species is as follows: 



Biological Surveys of Waters 



Rainy River 9 



Renfrew 29 



Simcoe 66 



Sudbury 28 



Temiskaming 11 



Thames Watershed ... . 472 



Thunder Bay 26 



Victoria 10 



Waterloo 14 



Welland 3 



Wellington 6 



Wentworth 4 



York 3 



Huron 3 



Total 1,233 



The progress made in connection with these surveys may be better under- 

 stood by the following comparisons: 



Number of waters Number of 



Year 

 1925... 

 1926... 

 1927... 

 1928... 

 1929... 



1,233 



The apparent drop between 1928 and 1929 is due to two factors. In the 

 first place 472 waters of the Thames watershed were included in the 1928 total, 

 and in 1929 the waters of the Grand River watershed were omitted, since only 

 meagre and preliminary surveys were made. Furthermore, there has been a 

 development of more specialized study apart from general biological surveys. 

 The more specialized studies are described later. The number of investigators 

 also affected the results, but this does not apply in 1928 and 1929, since groups 

 of two worked together in connection with general biological surveys. 



Biological Surveys — Particular: 

 Lake Erie: 



The survey of the eastern end of Lake Erie commenced in 1928, under 

 the joint auspices of the United States Bureau of Fisheries, the New York State 

 Conservation Department, the Buffalo Society of Natural Sciences, the State of 

 Ohio, and the Department of Game and Fisheries of the Province of Ontario, 

 was extended this year to include the entire lake. In this connection the 

 Department supplied a competent investigator, Mr. A. H. Louden, B.A., of 

 Queen's University, Kingston, to study more particularly the fishes of the lake 

 past the larval stages, since studies in connection with prelarval stages were 

 being undertaken by another investigator in connection with the same survey. 



