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<br />ix <br /> <br />High flows (>3600 cfs) were released during most of February <br />1982. The primary change that occurred during the high flow test <br />was a major emigration of cutthroat trout from the study area. <br />This emigration appears to have occurred during the first week of <br />hi g h fl ows. <br />No major changes in microhabitat choices were observed for <br />adult cutthroat trout nor for adult and juvenile rai~bow trout. <br />The average fish velocity during the test period for each life <br />stage and activity was lower, with one exception, than fish <br />velocities measured during medium flows in winter and summer <br />1981. <br /> <br />Post-test observations were made during March and April <br />1982. D'u-ring this period, fish began moving out of center pool <br />areas and into shallower, higher velocity areas, usually adjacent <br />to the pools. The number of fish observed, especially juvenile <br />rainbow trout, declined in late March and early April. It ap- <br />pears that many of these fish emigrated below Red Creek and out <br />of the s~dy area. <br />During the post-test period, some juvenile rainbow trout <br />were observed to use the interstitial crevices in rip-rap banks <br />for microhabitat. Based on their sizes, these fish apparently <br />were naturally reproduced in tile river. <br /> <br />~~~""~a___! ___ -'III.-t:,_~~lM__.-_~m!'_.",...,J.::.L. ,JJ.-., ~-==-':i:I""",,~ <br /> <br />'':'_~';;;.{'::'''''"'"~' <br /> <br />I <br />