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<br />previous years, mean total length of Colorado squawfish was greater in the lower <br />Colorado River (reach 1) than in the Green River (Table 7). Size of backwaters <br />sampled during the monitoring program ranged between 40 and 8160 m2, with maximum <br />depths between 1.0 to 6.4 ft (Appendix A, Table 10). Fathead minnows were the <br />most commonly collected species in the monitoring program, followed in abundance <br />by red shiners, sand shiners (Appendix A, Table 11). Small suckers and channel <br />catfish were also common in certain reaches. <br />Table 7. Mean total length of post-larval Colorado squawfish (<= 70 mm TL) <br />collected during Interagency Standardized Monitoring Program, 1988. <br />PRIMARY BACKWATERS SECONDARY BACKWATERS <br />RIVER/ TOTAL MEAN TOTAL MEAN <br />REACH MEASURED LENGTH SD RANGE MEASURED LENGTH SD RANGE <br />COLORADO RIVER <br />1 96 43.4 10.4 22 - 70 106 47.2 9.7 27 - 69 <br />2 1 32.0 0.0 32 - 32 0 <br />GREEN RIVER <br />3 1300 39.1 8.2 21 - 70 1639 38.4 7.7 ~20 - 70 <br />4 565 43.8 7.2 23 - 70 352 44.3 6.3 29 - 69 <br />8 <br />