Abstract Research was conducted on a smaller Wyoming foothills stream to attempt to develop a method for predicting the effect of winter ice-cover on the habitat available to a brown trout population. Predictive equations were developed relating percent habitat excluded to the following parameters: days from the winter solstice, degree days of frost, mean water velocity, and mean effective water depth. The resultant method could be of value to resource managers in determining winter instream flows to maintain trout habitat.
Trout habitat, instream flow, winter habitat, ice formation, ice hydrology, habitat exclusion, brown trout
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