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<br />-12- <br /> <br />Table 5. Dolores River trout (2()-4() cm) biomass (kg/ha), 1986-1991. <br /> <br />Species 10/86 10/87 10/88 09/89 10/90 04/91 10/91 <br /> IFIM Site - Metaska Campground - River Mile 0.5 <br />Brown 3.2 12.9 12.1 7.1 11.8 1.9 1.8 <br />Rainbow 8.6 11.5 7.3 14.3 3.9 3.4 4.8 <br />Cutthroat 5.0 3.2 1.0 4.0 0 0 0 <br />Total trout 16.8 27.7 20.4 25.4 15.7 5.4 6.6 <br /> Ferris Canyon Campground - River Mile 6 <br />Brown 4.6 3.4 25.2 24.9 12.8 4.0 12.6 <br />Rainbow 0 1.1 15.9 13.9 6.8 1.7 5.4 <br />Cutthroat 0.9 0 0 1.4 0 0 0 <br />Total trout 5.5 4.5 41.1 40.1 19.6 5.7 18.0 <br /> Rock Stockpile Area - River Mile 10 <br />Brown 2.0 17.2 31.3 14.4 12.7 3.5 6.2 <br />Rainbow 1.1 6.0 4.6 10.0 5.9 1.7 . 3.2 <br />Cutthroat 0 0 6.8 2.8 0 0 0.7 <br />Total trout 3.1 23.2 42.7 27.1 18.6 5.1 10.1 <br /> <br />Further evidence of significant decline is found in the segment of the trout population <!: 40 cm (<!: <br />16 in.). Total trout density (fable 6) and biomass (fable 1) are at or near a S-year low for all three <br />study sites. These data clearly indicate two things: 1) an adequate water supply is indispensable for <br />fish survival; and 2) the 20-70 cfs flow regime in place since March 1990 is inadequate on a year- <br />round basis. <br />