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<br />types of habitats are used and when they are used <br />purposes of developing recommendations to guide <br />restoration and flow management. <br /> <br />for the <br />habitat <br /> <br />VIII. FY 93 Tasks and Deliverables (as described in the approved <br />scope of work) : <br /> <br />1. Conduct experiments on growth rates <br />juvenile razorback sucker in Old Charley Wash, <br />and absence of nonindigenous species (fathead <br />shiners). <br /> <br />of larval and <br />in the presence <br />minnows and red <br /> <br />2. Monitor the spring habitat use of juvenile razorback <br />sucker in Old Charley Wash using telemetry to determine use <br />patterns and movements in response to water elevation changes. <br /> <br />3. Monitor the movement of adult razorback sucker during <br />postspawning periods with radio telemetry to determine what <br />sites fish are selecting following spawning. Areas used by <br />fishes and the duration of use will be determined. <br />Similarities among postspawning areas used will be determined <br />to define the characteristics of habitat suitability. <br /> <br />4. Continue to monitor growth of razorback sucker stocked <br />into the Leota Pond at the Ouray National wildlife Refuge. <br /> <br />5. Rev'iew alternate methods other than flow manipulation <br />that may increase habitat availability for various life stages <br />of razorback sucker. ' <br /> <br />6. Review the existing data base <br />associated with fish distribution and <br />razorback sucker. <br /> <br />to explore factors <br />spring habitat use of <br /> <br />IX. Accomplishments and shortcomings in completing tasks or <br />providing deliverables (Le. address each task/deliverable <br />identified in VII, above): <br /> <br />A. Accomplishments and Results: <br /> <br />This is the third field season associated with defining <br />the' importance of flooded bottomlands to various life stages <br />of the endangered fishes. This year an experiment was <br />initiated to evaluate the influence of a non-native competitor <br />(i.e. red shiners) on growth and survival of razorback sucker <br />larvae and juveniles. On June 10, 1993, razorback sucker <br />larvae (mean of 0.0062 gr/fish) were placed in cages with red <br />shiners collected from the Green River. The experimental <br />design included putting 500 razorback sucker larvae in each of <br />three cages, 250 razorback sucker in each of three cages and <br />three cages with 250 razorback sucker and 250 red shiners. <br />within 45 minutes of the initiation of the study, the red <br /> <br />2 <br />