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22 <br />0 <br /> <br />CHAPTER THREE: HYDROLOGY <br />0 <br />SPECIES RESPONSE TO FLOW <br />Spawning <br />Migration and spawning cues. <br />Colorado squawfish <br />o Streamflow is an important migration and spawning cue, but its integration <br />with water temperature makes cause-effect relationships difficult to <br />understand. <br />Tyus and Karp (1989) reported discharge to be an important spawning <br />cue and discussed difficulties in assessing both its role as a cue in itself <br />and as a cue indirectly by acting upon temperature and other <br />endogenous and exogenous fishes. An inverse relationship between <br />discharge and summer temperature was also reported. <br />Nesler (1986, 1987) reported declining flows (recessional limb of <br />hydrograph) to be associated with spawning of Colorado squawfish. He <br />0 noted that temperature may be an important spawning cue.