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<br />Table 3. Density-Biomass Index (mean of annual percent composition of <br />numbers and annual percent composition of volumes) for water <br />year 1980. <br /> <br /> Dunn Creek Elkhorn Pi pe Creek Fi sher Ri ver <br /> n=lO n=10 n=9 n=7 <br />Insect order x % x % x % x % <br />Ephemeroptera 36.5 31. 3 19.7 33.4 <br />Plecoptera 0.1 0.7 1.0 12.3 <br />Tri c hoptera 1.5 12.6 15.5 21. 5 <br />Chironorilidae 40.3 28. 1 36.8 14.8 <br />Other 21.6 27.4 27.1 18. 1 <br /> <br />* Percentages do not always total 100% due to rounding. <br /> <br />-14- <br />