Abstract
To characterize interactions among fish and dragonfly predators that influence population dynamics and community structure, we conducted enclosure/exclosure experiments (April-October) using 1.8-m diameter cylinders at 1-m depth in the littoral zone of Bays Mountain Lake, Tennessee. A nearly natural invertebrate assemblage colonized allochthonous detritus through 1.8-mm mesh screen from April to May when further colonization was restricted by 0.5-mm mesh. Treatments introduced in mid May consisted of all combinations of two densities of two predators--small sunfish (Lepomis macrochirus), 0 or 4 individuals/m 2 ; senior-year-class dragonfly larvae (Epitheca cynosura), 0 or 15 individuals/m 2 --acting on cohorts of junior-year-class E. cynosura hatching from eggs stocked at two densities, 90 or 900/m 2 . Treatments were assigned randomly in each of six spatiotemporal blocks: two in 1987 and four in 1988. Junior-year-class Epitheca hatching from eggs stocked at different densities ...
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