22 DEPARTMENT OF GAME AND FISHERIES No. 9 (1942) 



All of the waters enumerated above are closed to protect black bass and 

 maskinonge, with the exception of No. 2, for speckled trout, No. 10, for rainbow trout, 

 No. 14, for pickerel, and No. 17, for lake trout. 



REMOVAL OF COARSE FISH 



From December 27, 1940, to February 8, 1941, hoop nets and trap nets were 

 operated in Ahmic lake and tributary waters, for the removal of ling and suckers. 

 One thousand five hundred and twenty-seven ling and 234 suckers were caught. The 

 average weight of the ling and suckers was 5 lbs. and 2V^ lbs., respectively. 



BIOLOGICAL SURVEYS 



A biological survey of Curley lake, concession VI, lot 26, township of Glenelg, 

 county of Grey, indicated that it was suitable for large-mouthed black bass. 



Lake Scugog was examined to determine the suitability of certain areas as 

 sanctuaries for maskinonge. One of these areas is located at the south tip of Scugog 

 island and the other at King's bay, located at the northwest side of the lake. 



A site for a dam between Hart lake and Loughborough lake was investigated; 

 the dam is desirable in order to keep Loughborough lake at a more normal level. 



Pollution of a branch of the Credit river, in the township of Esquesing, county 

 of Halton, was investigated. A small stream flowing through Georgetown enters this 

 branch just south of the town, carrying with it wastes from a paper processing plant. 

 The pollution of the Moira river was also investigated. 



The Ontario Fisheries Research Laboratory of the Department of Biology, 

 University of Toronto, continued field and laboratory studies of lakes and streams 

 in Algonquin Park. 



Following the procedure of the previous year the members of the laboratory 

 cooperated with the Park staff in distributing speckled trout yearlings provided by 

 the Ontario Department of Game and Fisheries. The lakes stocked are included in 

 the lists in Appendix No. 1, under the district of Nipissing. Speckled trout planted 

 in Brewer, Cache, Costello and Opeongo lakes were marked by removal of the adipose 

 fin. This year one of the Park trucks was equipped with tanks making it possible to 

 transport the fish earlier in the season and to plant them while the surface waters 

 of the lakes were still quite cool, which should add greatly to their chances of 

 survival. It is extremely important that we should measure the success of these 

 plantings, and all persons fishing in the lakes in which speckled trout have been 

 planted are urged to report their catches through the medium of the creel census. 



The first successful planting of lake herring in lake Opeongo as food for the 

 trout was accomplished this year by transferring 250 six inch lake herring from Mary 

 river near Huntsville. 



The transport of adult lake trout from more inaccessible to heavily fished 

 waters was not successful. The pound nets were set in White Trout lake, but pre- 

 sumably owing to the extremely backward season the trout did not run and not 

 enough were caught to warrant the expense of continued fishing. 



Three of the smaller lakes, Jacks, Sproule and Sunday, accessible from the 

 highway and which do not offer fishing at present were investigated. These seem 

 suitable for trout and an attempt to develop fishing in them is planned. 



