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<br />4. Identification of new or verification of spawning areas formerly <br />identified for Colorado squawfish in the Gunnison River upstream <br />of Redlands Diversion Dam (added on for 1998). <br /> <br />V. Study area: Gunnison River: river mile 0.7-3.0 (confluence of the <br />Colorado River upstream to the Redlands Diversion Dam), upstream of the <br />Redlands Diversion Dam (river mile 3.1-60.0); Colorado River: 15- and <br />18-mile stream reaches. <br /> <br />VI. Study Methods/Approach: <br /> <br />A trapping facility constructed as per design at the upstream end of <br />the fish passageway structure designed to collect fish would be <br />monitored daily, Monday through Friday. During the winter months, the <br />frequency of checking the trap will be dictated by the extent of fish <br />use. For example, if fish use declines. the trap may be checked as <br />needed, about twice weekly. <br /> <br />The trapping facility will allow researchers to assess the use of the <br />passage structure by all fish species. All fishes collected will be <br />sorted, examined. and counted. Nonnative fish will be removed from the <br />river. Colorado squawfish or razorback sucker collected in the trap <br />will be checked for a.PIT tag or PIT tagged if they have not been <br />previously marked. These fish could be radiotagged. Crews checking <br />the fish trap will also be responsible for routine (daily) cleaning of <br />surface and submerged trash and debris from both the trash racks and <br />bar screens in the forebay of the fish passageway. Trash and debris <br />may also have to removed from the downstream fish passageway entrance. <br />The amount of debris and trash that will accumulate daily and annually <br />at the site is unknown and will be determined by the flow magnitude and <br />water volume during the water year. <br /> <br />Radiotelemetry technology will be used to determine if Colorado <br />squawfish are using the fish passageway and to monitor the temporal and <br />spatial movements of juvenile and adult Colorado squawfish within the <br />passageway, in the plunge pool. and in the 2.3-mile reach downstream of <br />Redlands Diversion Dam. A state.of.the-art automatic pulse-coded data- <br />logging radiotelemetry tracking system will be used that will <br />constantly monitor the movements and distribution of radiotagged fish <br />(Lotek 1995). This system has the capability of logging the date. <br />time, frequency, signal strength, ID code, and antennae location of <br />each radiotagged fish. Approximately 100 of. these systems have been <br /> <br />Redlands 8 <br />