32 Conservation Department 



about 6l^ pouiuls each in that section just above North Collins. 

 About a mile above this point near tributary 17 temperatures of 

 81 for air and 69 for water were recorded during the past summer, 

 indicating- suita])ility for l)rown trout. Opposite North Collins 

 and at all points below temperatures were much too high for trout. 

 A small plant of rainbows has been suggested. Were it not for the 

 impassable dams shutting oif all migration from Lake Erie, a run 

 of rainbows might be established and a much larger plant would 

 then be in order. 



Delaware Creek System: The main stream flows into Lake Erie 

 west of Angola. In 1921 Ilankinson and others studied this stream 

 in the region near Brant and reported that although it seemed 

 ideal for brook trout, plantings had not been successful. During 

 the past summer there was reported to us four unsuccessful 

 attempts to establish this species. We therefore see no reason for 

 continuing the experiment. There appears however to be a chance 

 of establishing a run of rainbows and for that purpose a total 

 annual plant of about 1,800 fingerlings has been recommended for 

 the next four years. 



Cattaraugus Creek System: This is by far the most promising 

 system for trout in the whole watershed. It has the highest stream 

 mileage suitable for trout and is worth}^ of heavier stocking than 

 any other in the Lake Erie watershed. Except for the uppermost 

 eleven miles, in which brown and rainbow trout were found, the 

 main stream at present is of no value as a trout stream. But 

 numerous tributaries in the upper half of the drainage area are of 

 such a character as to appeal strongh^ to every trout fisherman. It 

 is possible to mention only a few of them at this time. All, how- 

 ever, will be found in the Stocking List. 



Tlie upper part of North Branch of Clear creek, 6/ is dammed 

 to foi-m a reservoir about 1 mile long and 80 to 40 feet deep. Be- 

 cause of the low bottom temperatures, it was thought that trout 

 might find conditions suitable therein. Dr. Wagner's analysis, 

 however, while it indicated sufficient oxygen at the surface showed 

 none at a depth of 15 feet and below. It is not believed that trout 

 would survive in this reservoir. 



South Branch, 20,- is too warm for trout as far upstream as 

 East Otto, wliere cold pools begin to appear. Above this village 

 it is known as East Otto creek. From tributary IT) to source, the 

 water is entirely suitable for l)rown trout. A total annual plant of 

 about 1,900 fingerlings should not only cover the requirements of 

 the upj)ermost section but also those of the cold ]iools scattered 

 downstream. 



Mansfield creek (11-' of South liranch) is one of the finest trout 

 streams in the waterslied. it is well su])|)lied with spring water 

 from source down to about tributary :\, is cold, clear and contains 

 both brook and ])rovvii trout, possibly the latter in gi'eater num- 



^ Sec Map 3 A. 



^ ^'Sco Map 4B, 4C. 



