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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 24 for “"Recirculating Aquaculture Systems"”.
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Modeling effects of U-tube aeration in recirculating aquaculture systems
… equipment design and operation in high density recirculating aquaculture systems (RAS) requires consideration of the effects of RAS component design, water quality, and biological processes on oxygen transfer requirements. A computer model was developed to simulate multi-component gas transfer …
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Risk Analysis of Tilapia Recirculating Aquaculture Systems: A Monte Carlo Simulation Approach
… analytical model developed for a Re-circulating Aquaculture Systems through incorporation of risk considerations to evaluate the economic viability of the system. In addition the objective of this analysis is to provide a well documented risk based analytical system so that individuals …
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Temperature impact on nitrification and bacterial growth kinetics in acclimating recirculating aquaculture systems biofilters
… utilization rates in a batch laboratory-scale recirculating system. The tank system was designed for experiments on short term steady state and diurnal temperatures. A set of numerical models was developed to simulate observed results. The performance of the biofilters was determined with three …
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A Comparative Analysis of Three Biofilter Types Treating Wastewater Produced in Recirculating Aquaculture Systems
Nine recirculating systems at the Virginia Tech Aquaculture Center were placed on line and stocked with yellow perch, <I>Perca flavescens</I>, fingerlings. Fish were stocked at a density of approximately 455 fish m³. Biofilter types were the only factor differing among system designs and were an …
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Comparative Growth of All-Female Versus Mixed Sex Yellow Perch (Perca flavescens) in Recirculating Aquaculture Systems
Nine, production-scale, recirculating aquaculture systems were utilized to compare the growth parameters between all-female and mixed sex yellow perch stocks. Each system was stocked with 455 fish m⁻³ and contained one of three different biofilter types: a rotating biological contactor, a trickling …
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The Effects of Salinity on Zootechnical Performance of Spotted Seatrout (<i>Cynoscion nebulosus</i>) in Recirculating Aquaculture Systems
… is a euryhaline finfish candidate for marine aquaculture in the northern Gulf of Mexico. Aquaculture of this species currently uses salinities of 25 psu or greater making production challenging in areas where high salinity water is not available. This study aimed to document the effects of …
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Impact of Ozonation on System Performance and Growth Characteristics of Hybrid Striped Bass (Morone chrysops (f) x Morone saxatilis (m)) Reared in Recirculating Aquaculture Systems
… of hybrid striped bass reared in pilot scale recirculating systems. Nitrogenous wastes and dissolved organic compounds increased linearly (p < 0.01) throughout the trial under both ozonated and unozonated conditions. Ozone treatments 13 and 25 g O₃ / kg feed received 170 kg more feed than the …
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Production of hybrid striped bass (Morone chrysops x Morone saxatilis) in a recirculating aquaculture system
… saxatilis</i> male) cultured in pilot-scale recirculating aquaculture systems. Hybrid striped bass were stocked in nine 12,500 liter recirculating systems at a mean density of 149 fish/m³. Mean weight at stocking was 40.6 g. Overall survival averaged 72.5%. One system experienced 100% …
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Aquaponics : community and economic development
… tilapia, perch, lettuce, farming, closed-loop systems, community development, economic development, cash flow analysis, sustainability, economic viability, hydroponics, recirculating aquaculture systems, integrated aquaculture, integrated agriculture, worker-owned cooperatives, agroecology.
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Aquaculture of Pacu (Piaractus mesopotamicus) and a Comparison of its Quality: Microbiological, Sensory, and Proximate Composition
… quality of pond cultured pacu was compared to aquacultured hybrid striped bass, tilapia, and rainbow trout grown in pond and recirculating aquaculture systems. Sensorial analyses for differences in flavor, preference, and color were also determined. Protein concentration significantly …
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Investigation of the Microbiome of a Recirculating Aquaculture System (RAS) for Crassostrea virginica Larvae
<p>Recirculating Aquaculture Systems (RAS) offer control over physicochemical and biological factors impacting aquaculture success. One understudied facet of RASs is the water microbiome. Oyster larval microbiomes are shaped by their aquatic microbiomes. Understanding the dynamics of and the …
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WTP for RAS salmon by the US consumer
… produced with an emerging production method, recirculating aquaculture systems (RAS), which directly addresses the environmental challenges associated with the traditional farming method, open-net pens. Because of the higher costs associated with RAS, the salmon it produces requires a price …
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The development of a modular integrated recirculating aquaculture system using Porphyra (nori) for the bioremediation of marine finfish effluent
<p>It is crucial for the development of the fish aquaculture industry to be managed in a way that provides a reliable, long term source of products without negatively impacting the environment. The simplest form of integrated multi-tropic aquaculture (IMTA) uses a fed component (e.g. finfish) and …
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Denitrification of Recirculating Aquaculture System Waters Using an Upflow Biofilter and a Fermented Substrate
… high nitrate concentrations typically seen in recirculating aquaculture systems was studied using a synthetic nitrate wastewater supplied at two nitrate loadings, 1.13 and 2.52 kg NO3-N/m3/day. A supplemental carbon source was provided primarily through the fermentation of fish food which …
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Use of species genetic resources in Morone breeding programs
… traits of Marone species hybrids reared in recirculating aquaculture systems (RAS). Effects of hybridization and backcrossing among striped bass (Marone saxatilis), white bass (M chrysops) and yellow bass (M mississippiensis) on important traits were determined. This dissertation is …
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Denitrifying woodchip bioreactors for aquaculture manifold design and potential water reuse
… global food production sectors is aquaculture, the farming of aquatic plants and animals. Land-based aquatic production in recirculating aquaculture systems (RAS) offers an alternative to unsustainable conventional aquaculture methods. However, RAS production currently lacks an …
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Enhancing Aquaculture Sustainability Through Water Reuse and Biological Treatment
… depend on this source of protein. Traditional aquaculture practices use pond and flow-through systems which are often responsible for discharging pollutants into the environment. Furthermore, aquacultural feeds often contain high levels of fish protein, so the demand on wild fisheries is not …
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An Evaluation of Population Restoration and Monitoring Techniques for Freshwater Mussels in the Upper Clinch River, Virginia, and Refinement of Culture Methods for Laboratory-Propagated Juveniles
… laboratory-propagated juveniles in small water-recirculating aquaculture systems. Growing endangered juveniles to larger sizes will improve survival in captivity and after release into the wild. As a result, hatcheries can reduce the time that juveniles spend in captivity and thus increase their …
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The Presence of Pathogenic Bacteria in Recirculating Aquaculture System Biofilms and their Response to Various Sanitizers
Recirculating aquaculture offers a prospect for successful fish farming, but this form of aquaculture presents a great potential for pathogenic microorganisms to become established in the system through the formation of biofilms. Biofilms are capable of forming on all aquaculture system components, …
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Novel Aquafeed Towards A Sustainable Aquaculture
… for human consumption is provided by both the aquaculture industry and the capture fisheries, however, the flat-lined production of seafood from capture fisheries means aquaculture production should double in number to provide enough protein by 2050. Culturing fish at higher densities is being …
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