Abstract
ABSTRACT Clam aquaculturists have suspected low water flow over clam grow-out areas as a principal explanation for decreased growth and yield of bivalves; however, empirical data from field studies to support these observations are rare and in some cases contradictory. I conducted two experiments in Back Sound, NC, to examine the effects of water flow and juvenile density on hard clam survivorship and growth. The first experiment assessed differences in early growth and survivorship of juvenile seed clams under three manipulated water flows (enhanced [0–32 cm sec-1], reduced [0–12 cm sec-1], and ambient tidal flows [0–22 cm sec-1]) and three initial stocking density (250, 500, or 1000 m-2) of juvenile clams (shell length [SL] = 9 mm). The second set experiment examined the effects of two different water flow regimes (ambient [0–22 cm sec-1] and low [ 0–11 cm sec-1]), and three stocking densities (250, 500, or 1000 m-2) on growth of seed clams (SL = 12 mm) to market size. Unlike the first experiment, in wh...
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