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<br />" <br /> <br />.. <br /> <br />BIOLOGY OF YOUNG COLORA : 0 SQUA WFISH <br /> <br />83 <br /> <br /> 150 <br /> 120 <br /> 90 <br /> 60 <br /> 30 <br />{\j <br />E <br />0 <br />~ 0 <br />"- <br />I <br />0 <br />I- <br /><{ <br />U <br /> 50 <br /> 40 <br /> 30 <br /> 20 <br /> 10 <br /> 0 <br /> <br />JULY I AUGUST <br /> <br /> <br />EPTEMBER/OCTOBER <br /> <br />FIGURE 2.-Average catch of age-O Colorado squawfish in bac <br />July-August 1981 and 1984-1988 (upper) and September-Octob <br />is measured from the Colorado River. <br /> <br /> <br />aters per 100 m2 seined in the Green River, <br />1979-1985 and 1987-1988 (lower). Distance <br /> <br />TABLE 2. - Hatching dates of larval Colorado squawfish captur in the Yampa and Green rivers. Dates were <br />calculated from total lengths of fish and capture date by use of eq ations of Haynes et al. (1984) and Nesler et al. <br />(1988); N = number of fish. <br /> <br /> Yampa and upper Green rivers Lower Green River <br />Year Mean Range" N Mean Range" N <br />1981 Jun 29 Jun 13-Jul 6 36 Jun 20 Jun 13-Jul 4 24 <br />1982 Jull4 Jul IO-Jul 22 98 <br />1983 Jul28 Jun 22-Aug 3 91 <br />1984 Jul 30 Jul IO-Aug 6 33 Jul5 Jun 26-Ju116 19 <br />1985 Jul 5 Jun 27-Jul 14 183 Jul6 Jun 25-Jul 13 95 <br />1986 Jul20 Jul 9-Jul 27 30 Jul24 Jul 9-Aug 2 426 <br />1987 Jun 28 Jun II-Jul]6 745 Jun 30 Jun IO-Jul16 1,490 <br />1988 Jul8 Jun 22-Jul16 450 Jul6 Jnn 22-Ju116 252 <br />"Range ~ dates that included 90% of the sampled fish. <br />