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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />have suffkient detail to provide the experts and project particip:mts with an <br />~t of the study design and the volume of data. Also, limitations were <br />identified that may affect 'the utility of the data for curve developnent. <br /> <br />Objective 3: SUDanary Tables <br /> <br />Methcxi.<:;. In ad:ii tian to the study narratives, the data associated with <br />the three target species \<ere drawn from the datafiles and assimilated into <br />SUlllDa.ry tables. Each table represented the data of a particular life stage of <br />a species within a single river. <br /> <br />Results. A total of 108 summary tables ~re developed from FWS/DATABASE. <br />These sunmary tables \<ere the principal tool used l:1f the experts in W::lrkshop #1 <br />to develop the data partitions. <br /> <br />Objective 4: SI Curves FreIn Previous Studies <br /> <br />Methods. Another aspect of Task A was to research the literature to <br />identify previous studies that had developed SI curves for these rare fish. <br />several studies have presented and used habitat preference type curves for <br />Colora:kl squawfish and humpl:ack chub. These studies and the resultant curves <br />\<ere identified, and are briefly discussed in this report. curves were also <br />developed l7y the FWS in 1984 tut they are excluded fran this discussion since <br />their validity is the focus of this study. <br /> <br />Resul ts . The follcwing are identified as previous studies in which <br />habitat utilization curves \<ere developed: <br /> <br />STUDY NO 1: <br /> <br />Holden, P. B. 1977. A s'tUdy of the habitat use and movanent of the rare <br />fishes in the Green River fran Jensen to Green River, Utah, August and <br />Septenber, 1977. BIOjWE'.ST PR-21-1, Logan, trr. <br /> <br />Holden, P. B. 1977. Habitat requiranents of juvenile Colorado River squaw- <br />fish. u.s. Fish and. Wildl. ser., FWS/OBS-77/65, Ft. Collins, co. <br /> <br />This study was funded by the FWS, Western Energy and Land Use Team, Ft . <br />Collins, and had as one of its objectives to "determine the physical and <br />chanical parameters of the habitats used by all sizes of rare fishes with <br />an};hasis on young fishes". Sampling primarily involved seining and electro- <br />fishing, with a variety of seines being enployed. The section of the Green <br />River fran Jensen to about the mouth of the Price River was sampled. sanpling <br />was conducted in all available habitats. <br /> <br />The study collected 162 YOY (34-64 mm) ,35 juvenile (65-200 mm), and 6 <br />larger Colorado squawfish; 50 YO'{ (30-69 mm), 21 juvenile (70-150 mm), and 7 <br />adul t hulll>back chub; and 2 ;;dul t razorback sucker. Six razorback sucker <br />juveniles \<ere also reported, although subsequent analysis has indicated these <br />w:!re probably razorback x flannelmouth sucker hybrids. ISbitat preference <br /> <br />5 <br />