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Table 6. Summary of results for young-of-the-year Colorado squawfish <br />monitoring, Green and Colorado rivers, 1986. <br />TOTAL TOTAL TOTAL MEAN <br />NUMBER AREA COLORADO CPUE TOTAL LENGTH <br />RIVER/ OF SEINED SQUAWFISH (FISH/ STANDARD ------------ <br />REACH SAMPLES (m2) COLLECTED 100m2) DEVIATION MEAN RANGE <br />PRIMARY BACKWATERS ONLY <br />COLORADO RIVER <br />RM 0-110 29 1000 125 9.768 17.211 27 17- 38 <br />RN 140-170 12 670 24 3.138 6.658 24 20- 29 <br />GREEN RIVER <br />RM 0-120 33 1352 503 44.594 72.626 28 19- 48 <br />RN 200-319 42 1824 163 10.852 20.141 28 19- 46 <br />SECONDARY BACKWATERS ONLY <br />COLORADO RIVER <br />RM 0-110 11 436 67 18.500 21.859 29 21- 39 <br />RN 140-170 10 450 8 3.015 5.817 26 19- 33 <br />GREEN RIVER <br />RM 0-120 17 612 342 52.344 70.026 29 19- 43 <br />RM 200-319 41 1952 329 16.027 29.068 29 20- 39 <br />the upper Colorado River tended to be slightly smaller than those found in the <br />Green and lower Colorado rivers. <br />Size of backwaters sampled during the monitoring program ranged between 52 and <br />5049 m2, with maximum depths between 1.0 to 4.5 ft (Appendix 8, Table 8). <br />Red shiners were the most commonly collected species in the monitoring program, <br />followed in abundance by fathead minnows, sand shiners and unidentified suckers <br />(Appendix A. Table 9). <br />6