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<br />Table 7. <br /> <br />Length stratified Chapman Petersen abundance estimate for <br />humpback chub ~ 150 mm in the Little Colorado River, spring 2004. <br /> <br />Length (mm) <br /> <br />150 to 250 <br /> <br />>250 <br /> <br />Sum strata <br /> <br />95% Confidence Interval <br /> <br />Marked Captured Recaptured N <br /> <br />SE <br /> <br />Lower <br /> <br />Upper <br /> <br />156 250 39 984 <br /> <br />122 <br /> <br />745 <br /> <br />1,223 <br /> <br />117 102 8 1,349 <br /> <br />392 <br /> <br />581 <br /> <br />2,118 <br /> <br />2,334 <br /> <br />1,529 <br /> <br />3,138 <br /> <br />411 <br /> <br />~ <br /> <br />41 <br />