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<br />Table 16. <br /> <br />Abundance estimates of humpback chub ~ 200 mm by year and <br />month; Little Colorado River. <br /> <br /> 95% Confidence Interval <br />Date Abundance Estimate SE Lower Upper Reach (rkm) # per km <br />October/November 2001 463 46 369 577 0-13,6 36 <br />October/November 2002 639 67 666 1,010 o - 13,6 62 <br />September/October 2003 697 105 691 1,103 o - 13,6 66 <br />September/October 2004 796 164 435 1,157 0-13,6 59 <br /> <br />2001 estimate is from Van Haverbeke and Coggins (2002). 2002 estimate is from Van Haverbeke <br />(2003),2003 estimate is from Van Haverbeke (2004). <br /> <br />50 <br />