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<br />. . <br /> <br />ANNUAL MEANS <br /> <br />OCTOBER 1979 <br /> <br />SEPTEMBER 1980 <br /> <br /> 40 <br /> 35 <br /> 30 <br /> N <br />I E <br />...... "- 25 <br />w <br />I U <br /> u <br /> 20 <br /> en <br /> en 15 <br /> ct <br /> ~ <br /> 0 10 <br /> - <br /> a:l <br /> 5 <br /> <br /> <br />E <br /> <br />p <br /> <br />T CH 0 <br /> <br />E <br /> <br />p <br /> <br />T CH 0 <br /> <br />E <br /> <br />p <br /> <br />T CH 0 <br /> <br />E <br /> <br />p <br /> <br />T CH 0 <br /> <br />DUNN CR. <br /> <br />ELKHORN <br /> <br />PIPE CR. <br /> <br />FISHER R. <br /> <br />Figure 4. Annual means of monthly mean volumes in cubic centimeters per square meter of Ephemeroptera <br />(E), Plecoptera (P), Trichoptera (T), Chironomidae (Ch), and other insects to) by sampling <br />site and combined by sampling sites. One standard deviation is shown by I on each bar. <br />