Abstract
Production and P/B ratios of predaceous midges of the tribes Sphaeromiini and Palpomyiini (Diptera: Ceratopogonidae) collected from sublittoral and littoral depths in Lake Norman, North Carolina, were estimated by the size-frequency method. Production estimates in g dry wt/m2/yr at eight sampling locations ranged from 0.002 to 0.022. The littoral zone as a whole was more productive (0.015 g/m2/yr) than the sublittoral zone (0.006 g/m2/yr). The P/B ratios ranged from 2.37 to 3.78 among all stations and depths.
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