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44 <br />• Bonytail chub. <br />o No data are available regarding larval survival-flow relationships. <br />Growth <br />o Summer flows above historic levels may impede growth of the rare fishes by <br />depressing water temperatures. <br />Kaeding and Osmundson (1986, 1988b) and Kaeding et al. (1985) <br />reported low water temperature to suppress growth of Colorado <br />squawfish in the Upper Colorado River Basin. - <br />Food Availability <br />. o Daily fluctuating flows, though detrimental to larvae of the rare fishes during <br />late summer may in some cases cause increased food to be flushed into the <br />channel. <br />U.S. Department of the Interior (1987b) reported food availability (all food <br />types combined) to increase slightly under conditions of daily flow <br />fluctuation in the Colorado River below Glen Canyon Dam. <br />Wydoski (1980), however, reported water level fluctuation below Flaming <br />Gorge Dam to be detrimental to invertebrate populations. He further <br />states that fluctuation can increase invertebrate populations under some <br />conditions, thus each reach must be evaluated on a case-by-case basis. <br />0