About

Published Study:
Cobia Farming in Puerto Rico

The following figures exhibit the use of AquaModel with screen prints from 5 minute inrements of a month-long model run for a study site in exposed, open ocean waters near Puerto Rico. A few of the available XY plots and transects are shown below and the main figure indicates sedimentation of farm-source carbon on the sea bottom. Read More...

Location
Exposed coastal shelf off the east coast of Puerto Rico
Farm
Ten submerged SeaStation cages, about 405 metric tons of cobia (Rachycentron canadum)
Prepared for
Ocean Harvest Aquaculture Inc. and the National Oceanic and Atmospheric Administration
Report
Rensel, J.E., D.A. Kiefer and F.J. O'Brien. 2006. Modeling Water Column and Benthic Effects of Fish Mariculture of Cobia (Rachycentron canadum) in Puerto Rico: Cobia AquaModel. Final report, 60 pp.

Figure 1. Typical higher current velocity screen print.
Top right velocity plot at 28 cm s-1; no carbon being deposited on bottom (right center plot) and very slight localized nitrogen plume along center of transect (left center plot). Blue line from center is a current vector (speed and direction) indicator.

Figure 1: AquaModel screen print

Figure 2. Later in same time series after a sustained period of slow velocity.  Note faint shadow to NE indicating low level <0.2 g C/m^2 deposition graded toward edge of mixing zone.

Figure 2: AquaModel screen print

Figure 3. Much later in same time series with current direction reversal and maximum carbon deposition showing in main plot and in profile in right center (scale 1 to 10, purple mound indicating < 1 g C m-2 beneath simulated cage).

Figure 3: AquaModel screen print

Figure 4. Stronger currents resuming and resuspension having removed temporarily deposited solids from the bottom.

Figure 4: AquaModel screen print