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Wickers et al (1982) tenatively defined the winter 

 microhabitat preferences for adult brown trout in medium 

 sized streams that were totally ice covered. Preferred 

 resting microhabitats (assumed to be the most heavily used 

 microhabitats by trout) were areas having a thick covering 

 of sheet ice, water depths of 0.50 - 0.99 feet, mean 

 velocities <0.50 fps, and a substrate consisting of rubble 

 and gravel. Brown trout preferred shallower depths when 

 total ice cover was present in contrast to the pre-ice 

 resting preference for deep pools. This finding is in 

 agreement with Logan (1961), who observed that rainbow trout 

 in Bridger Creek, Montana, were mainly found in pools during 

 spring, summer and fall, while in winter many trout moved 

 into shallower water having surface ice cover. 



Lewis (1967) reported that brown and rainbow trout in Little 

 Prickly Pear Creek, Montana, tended to move into pools in 

 winter while in summer trout inhabited pools and riffles 

 about equally. Chapman and Bjornn (1968) concluded that 

 there are advantages for stream dwelling salmonids to occupy 

 deeper, quiet waters associated with cover in winter. The 

 greater use of the deeper habitats in winter, as reported by 

 these authors, is in contrast to the findings of Logan 

 (1961) and Wickers et al (1982 ) . ' '^" ' ' '' 



Hartman (1963) stated that juvenile rainbow trout, brown 

 trout and coho salmon have seasonal behavioral similarities. 



