Abstract
ABSTRACT Physical and biological factors that appear to influence standing stocks (kg/ha) of brook trout (Salvelinus fontinalis) were identified in the Medicine Bow National Forest, Wyoming, for 32 forested reaches of mountain streams in drainages unaltered by human activity. Brook trout abundance declined as stream size increased. This decline appeared to be related to at least two factors—decline in habitat quality with increasing stream size and interaction with brown trout (Salmo trutta) at lower elevations. The greatest variation in brook trout abundance (R2=0.77) was accounted for by drainage basin area and elevation of the stream reach.
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