TABLE 2b. 



SUr>lMER BROOD SURVEY 



STREAM CHARACTERISTICS 



DISCUSSION 



Certain streams stand out in terms of potential harlequin duck use 

 after reviewing and comparing the data in Tables 2b-, 2c., and 2d. 



The East Fork of the Yaak is one of these streams. It appears that 

 the E. Fork has the best overall potential to support harlequin 

 duck production, rating the highest in terms of habitat character- 

 istics and stream flow volume. Average gradient of low gradient 

 reaches surveyed was 1.2 %. This is slightly higher than what Wallen 

 and Groves (1989) found in nesting areas of Northern Idaho (<1°). 



-6- 



