Master of Science (MS)
Marine Affairs and Policy (Marine)
Date of Defense
First Committee Member
Daniel D. Benetti
Second Committee Member
Maria L. Estevanez
Third Committee Member
German E. Merino
The biological and technological feasibility of using the agarophyte Gracilaria tikvahiae as a biofilter for the bioremediation of nitrogenous effluents resulting from juvenile cobia culture was examined. Using a thorough literature review of the most relevant published research, optimal parameters are identified and discussed within the context of juvenile cobia culture, while factors maximizing biofiltration and growth of Gracilaria within a biofilter system are outlined. The study attempts to match cobia nitrogen excretion rates with rates of algal nutrient uptake to size the initial biomass of algae needed in a filter for the culture of 10,000 juvenile (<30g) cobia. The culture of 10,000 juvenile cobia, 28-70 days post hatch (DPH), produces a maximum of roughly 300g of nitrogen daily which in turn can support roughly 12-27kg of algae (wet weight) per day, depending on uptake rate. The supportable algae biomass is then used to size the initial stocking density of the algae filter. Optimal system components are identified and management considerations are discussed with respect to optimizing growth as a means to maximize biofiltration and nutrient extraction capacity over time.
Algae Biofilters; Bioremediation; Aquaculture; Integrated Aquaculture; Neal Asthana; macroalgae; Effluent Bioremediation
Asthana, Neal, "Utilizing the Agarophyte (Gracilaria tikvahiae) as a Biofilter for the Bioremediation of Cobia (Rachycentron canadum) Nitrogenous Effluents in Flow-through Aquaculture Systems" (2015). Open Access Theses. 592.