part of the streambed, usually accounting for 60 to 80% of the 

 rock sizes. Pebbles were less common but still prevalent, making 

 up about 30% of the streambeds, while boulders usually made up 

 less than 10% of rock types. Since trails were used to access 

 the streams, the human proximity category was always "near" (see 

 definitions, Appendix A) . 



Stream Flow 



Stream flow data such as flow rate, width, depth and 

 temperature were recorded at each creek mouth. These data are 

 presented in Table 4, along with the stream flow volume, 

 calculated from the field data. Water temperature was also 

 recorded, which was usually 15 degrees Celsius, plus or minus a 

 few degrees. Again, it should be noted that water volume in the 

 streams was decreasing, at times drastically, throughout the 

 study. 



Although the habitat data gathered in this study provide a 

 rough outline of stream characteristics, a more concentrated and 

 detailed effort would be necessary to provide data sufficient for 

 the comparison of harlequin habitat from one stream to the next. 

 Because of the low numbers of harlequins observed, no statistical 

 tests were run to correlate habitat characteristics with use by 

 the ducks. Because these were the first surveys for harlequins 



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