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<br />. " <br /> <br />. <br /> <br />. <br /> <br />CURVE SET: <br /> <br />16 - Humpback Chub Size 5 (260+ mm) <br /> <br />WHERE DATA COLLECTED: Colorado, Green, Yampa Rivers. <br /> <br />WHERE CURVES APPLY: Upper Colorado,River System occupied by humpback <br />chub. <br /> <br />WHEN DATA COLLECTED: March - November <br /> <br />WHEN CURVES APPLY: March - November <br /> <br />HOW DATA COLLECTED: Radiotelemetry, electrofishing, nets, angling <br /> <br />PARAMETERS: Depth = total water column depth in feet at point of <br />collection or triangulation. <br /> <br />Velocity = mean water column velocity in feet/second at <br />point of collection or triangulation. <br /> <br />Substrate = see Table C-l. <br /> <br />Habitat = see Table C-2. <br /> <br />CONFIDENCE RATINGS: 'B" for depth, velocity, substrate, because, <br />although sample size was adequate, the quality <br />of the data was restricted by possible gear <br />limitations from sampling in the deep riverine <br />regions occupied by the species. <br /> <br />CONSTRAINTS: <br /> <br />1. Apply only to Size 5 - Nonspawning Adults. <br /> <br />2. Use only in known or potential humpback chub habitat. <br /> <br />QUALIFIERS: <br /> <br />1. Taxonomic problems with Gila sp. lend problems to <br />identification of adult fish afield. <br /> <br />2. Caution is advised in applying curves to times other than <br />MarCh-November, since all collections are from these months. <br /> <br />3. Data collected in specific humpback chub habitats only, i.e., <br />black Rocks, Westwater Canyon, Gray Canyon. <br /> <br />4. Use of "dominant" substrate not advised for future analyses, <br />since "dominant" and "secondary" substrates should be <br />considered. <br />DATA GAPS/NEEDS: <br /> <br />1. Gain ability to reliably identify adult humpback chubs afield. <br /> <br />RAW DATA USED: <br /> <br />See Appendix D <br /> <br />A.1.8 <br />