Biological Survey — Erie-Niagara Watershed 35 



tint and if this species is used in stocking, there should be Ushing 

 all the wa}^ downstream to mouth. Tributary 1, is a small cold 

 spring-run possibly large enough, however, to support some fish- 

 ing and should be reserved for brook trout. 



Clear creek is another popular fishing stream and consequently 

 much over-fished. In addition to tliis it has few good pools and 

 is subject to high water. While it is productive at the present 

 time it \vould be much more so, if pools could be established. 



All three species of trout were taken but brown and rainbow 

 trout w^ere more abundant, especially so in the section between 

 Sandusky and Arcade. Clear creek is another in which brown 

 trout are confined chiefly to the main stream w^iile the more im- 

 portant tributaries are colder and better adapted to brook trout. 



Crystal lake is not suitable for trout but its outlet just below 

 the lake receives much cold spring water and continues cold until 

 it joins Clear creek. Moores pond is an enlargement of the outlet 

 a short distance below^ the lake in which several good sized brook 

 trout were observed. 



Skim lake is spring fed and cold. According to Dr. Wagner's 

 analysis, the water at the bottom showed a temperature of 4:8°F., 

 with an oxygen content of 13.5 p. p.m., indicating suitability for 

 brook trout. The lake also contains large-mouthed bass and sunfish. 

 There is some question as to how Avell bass and trout will get along 

 together in the same pond. We believe that the cold water is better 

 suited to trout than to bass and hence have suggested an experi- 

 mental planting of brook trout. If this lake is so stocked in 1929, 

 fishermen should be on the lookout for them in 1930 and '31 

 and the future stocking policy should depend upon the success 

 of this first plant. 



Ilayden brook, the outlet of Skim lake, also receives much 

 spring water below the lake and continues cold all the way down 

 to Clear creek. It should be reserved for brook trout. 



Silver Creek System: The main stream on July 10 showed 

 temperatures from 78 to 84 with corresponding air temperatures 

 of 82 and 84, much too high for trout. Tributary 1, Walnut creek, 

 was examined with more than usual care because it had been 

 stocked apparently without success. The water temperatures on 

 July 18 varied from 84 to 86 and the reason for the lack of suc- 

 cess in stocking is evident. 



The only trout water in the system wdll probably be found in the 

 newly constructed reservoir situated in tributary 8. This will have 

 a maximum depth of about 35 feet and will undoubtedly be large 

 enough to hold mature rainbow trout. The streams above the res- 

 ervoir appear to have favorable conditions for the spawning of 

 this species. 



Canadaway Creek System: Brown trout have been taken in tw^o 

 sections, near the head of the main stream and just below the falls 

 at Laona. The former section shows temperatures low enough 



