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Marine copepods commonly exhibit vertical movements in the water column over the diel cycle, termed diel vertical migration (DVM), with the most common pattern being an ascent in the water column to minimum depth around sunset and descent to maximum depth around sunrise. The present study characterized the DVM pattern of the pontellid copepod Calanopia americana Dahl in the Newport River estuary (North...
The marine copepod Calanopia americana Dahl undergoes twilight diel vertical migration (DVM) in the Newport River estuary, North Carolina, USA, in synchrony with the light:dark cycle. Copepods ascend to the surface at sunset, descend to the bottom around midnight, and make a second ascent and descent before sunrise. Behavioral assays with C. americana in the laboratory during fall 2002/2003 and summer...
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