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Humpback Chub Monitoring <br />Only two files contained data that met the criteria established for humpback chub <br />monitoring (Table 5). <br />Table 5. Files that contained data corresponding to the criteria established <br />for humpback chub monitoring. <br />SAMPLE SAMPLE <br />FILE NAME DESIGN AGENCY RIVER REACH YEAR SIZE <br />C080DATA SURVEY FWS CO WESTWATER 1980 3 <br />83CATCHR SURVEY FWS CO WESTWATER 1983 9 <br />No data corresponding to the criteria described above were found for the Black <br />Rocks area. The corresponding data for Westwater Canyon consisted of limited <br />collections with small sample sizes (Table 6). Because of the small sample <br />sizes, comparisons of catch rate among years is probably not useful. <br />Table 6. Mean catch-per-unit effort of humpback chub (fish per net-hour) for <br />data comparable to the Interagency Standardized Monitoring Program. <br />MEAN CPUE SAMPLE STANDARD 90% CONF <br />REACH YEAR (FISH/HR) SIZE ERROR INTERVAL <br />Lower Westwater 80 0 1 - - <br />Lower Westwater 83 0 5 - - <br />Lower Westwater 8612 0.04 ? - - <br />Upper Westwater 80 0 2 - - <br />Upper Westwater 83 0.53 5 0.689 1.469 <br />Upper Westwater 8612 0.97 ? - - <br />lInteragency Standardized Monitoring Program,-UDWR <br />20nly summarized data was available for this report. <br />15