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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Black Bullhead <br /> <br /> <br />Other <br />55% <br />Hemiptera <br />Ind. Organic <br />Diptera <br />Chironomids <br />Copepoda <br />Decapoda <br />Ephemeropteral <br />Corixidae <br /> <br />\\+'A,\I\n;+Lh",\l\*,\\\WJ;\lhWHih#;,~ <br /> <br />Channel Catfish <br /> <br />Other <br />63% <br />Plant matter <br />Trichoptera <br />Plecoptera <br />Diptera <br />Ephemeroptera <br />Decapoda <br />Ind. Organic <br />Megaloptera <br />Coleoptera <br /> <br /> <br />Empty <br />26% <br /> <br />Figure 15. Frequency of occurrence of prey in stomachs of black bullhead and channel <br />catfish in the Colorado River by major food groups and decreasing order of frequency of <br />occurrence of prey items within food groups. <br /> <br />29 <br />