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the previous one will be refined and summarized after results of this new <br />technique are available. <br />Colorado squawfish and razorback sucker exhibit seasonal patterns in their <br />selection of various habitat types and characteristics (Osmundson and <br />Kaeding 1989). We can thus partition the water year according to these <br />patterns. Although razorbacks and squawfish may have somewhat different <br />seasonal habitat use patterns, our data on squawfish are more extensive <br />and therefore more reliable. We therefore have chosen to partition the <br />year according to the seasonal use habits of Colorado squawfish. Three <br />major periods and two short transitional periods emerge. Though timing of <br />changes in squawfish behavior varies slightly from year to year according <br />to flow and temperature conditions, a pattern of winter habitat use occurs <br />roughly from November through February; spring habitat use, from April <br />through June; summer habitat use, from July through September. October and <br />March appear to be transition periods for squawfish going-into and coming <br />out of winter; patterns of habitat use during these two months are simi- <br />lar, though squawfish use somewhat deeper water during October than during <br />March. As mentioned above, provisional flow recommendations for the summer <br />months have already been provided. Flows for the spring, winter and tran- <br />sition periods are considered here. <br />SPRING FLOWS (APRIL-JUNE) <br />Colorado Squawfish <br />General <br />Flows in the 15-mile reach start to rise slightly in late March due to the <br />beginning of spring runoff; however, in early April,. the irrigation season <br />4