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20 <br />and microvegetation; Ceratopogonidae are predators on smaller invertebrates; <br />and Simuliidae are filter feeders. <br />All fish except Adult Killifish consumed Diptera. The Juvenile <br />Ictalurus consumed significantly more Diptera than other fish over all <br />strata and at Stratum B. YOY Ictalurus consumed significantly more than <br />other fish at Strata A, C, D, and E. At Stratum F, YOY Gila consumed <br />significantly more than all other fish except YOY Ptychocheilus. <br />Coleoptera <br />Beetles were a minor food item composed primarily of Elmidae (Riffle <br />Beetles). These are collectors and gatherers of debris in the benthic <br />habitat. <br />YOY Ictalurus consumed significantly more Coleoptera than other fish <br />over all strata and at Stratum A. <br />Trichoptera <br />Caddisflies were dominated by Hydropsyche (collector-filterer); <br />Glossosoma and Hydroptilidae (both scrapers) were not as abundant. All of <br />these are benthic in habitat but are an important component of the drift. <br />On the basis of raw weights, YOY Ictalurus consumed significantly <br />more Trichoptera than all other fish except YOY C. latipinnis, but on the <br />basis of ranked weights, Adult Rhinichthys consumed more than other fish. <br />At Stratum VI, Juvenile Gila consumed significantly more Trichoptera than <br />did other fish and at Strata A and B, YOY Ictalurus consumed significantly <br />more Trichoptera than did other fish.