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v 3o Reach 1 ~ z9 Reach 3 <br />m Y4 25 <br />U 21 , <br />N 20 20 <br />p 12 <br />U 10 10 5 <br />~ ~ 2 .4 .7 .8 .9 .4 1 .7 1 .6 2 <br />t 0 0 <br />u.. <br />_ 66 87 60 89 90 91 92 9J 94 <br />d <br />0 30 26 Reach 2 30 <br />~- <br />~ 20 20 <br />13 <br />~ 10 9 10 <br />U 0 .4 .1 .1 1.3 .8 ,1 0 <br />U <br />a <br />86 67 88 89 90 91 92 9J 94 <br />Year <br />1.4 <br />86 67 66 a9 90 97 92 9J 94 <br />Reach 4 <br />19 <br />4 g~ 3 2 3 4 <br />I I I I I 1 1 1 1 <br />e6 d7 ee !9 90 97 92 __9J 94 <br />Year <br />Figure 6.-Percentage of the total catch in the first seine haul of primary backwaters comprised of <br />native fishes during fall ISMP sampling in the Green and Colorado rivers, 1986-1994. <br />Catch rates for the three most common species (fathead minnow Pimephales promelas, red shiner <br />G~prinella lutrensis, and sand shiner Notropis stramineus) increased in 1994 (Figure 7). The change <br />was especially high for red shiner in Reach 4 of the Green River where mean CPE increased from 3.4 <br />to 22.7 fish/m2. <br />7 <br />