Global ETD Search
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 11 of 11 for “"recirculating system"”.
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Setting optimal diet ratios of kelp (Ecklonia maxima (Osbeck) Papenfuss) and formulated feed, and tests of a recirculating system using Ulva (Chlorophyta) as a biofilter, in South African abalone (Haliotis midae) cultivation
… rates (recirculation component) in an integrated system using the green seaweed Ulva as a biofilter. Aims for both components were to investigate the performance of the systems in terms of health of abalone, growth rates of abalone, sediment loadings and water quality. Both components were …
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Reproductive Manipulation and Larval Rearing Techniques of Yellow Perch (Perca flavescens)
… performance of larval yellow perch reared in a recirculating system fed only live rotifers (T1), in a recirculating system fed live rotifers and an artificial diet (T2) and in a greenwater system (T3). Survival was low in all treatments. The specific growth rate did not differ among treatments …
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Biological and economical feasibility studies of using seaweeds Ulva lactuca (Chlorophyta) in recirculation systems in abalone farming
… study was to investigate whether a land-based recirculating seaweed-abalone integrated aquaculture system using Ulva lactuca was feasible as well as to test the differences between a commercial gravel bed recirculation system to an existing flow through system. These studies were carried out at …
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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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Response to parameter variation of a one-inch diameter hydrocyclone for pyritic sulfur removal
… to the hydrocyclone could also be varied. A recirculating system was used. Synthetic material was used in place of actual coal during this investigation. The synthetic material, made from casting resin and barium sulfate, duplicated the coal with respect to particle size, shape, and specific …
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Nanomaterials and photonic solutions. Novel ‘at source’ approaches to stop hospital-derived priority substances reaching the sewer network.
… reactor was developed and tested as a flat-bed recirculating system. The reactor was equipped with durable planar ZnO-functionalised substrates, enabling the generation of a thin aqueous film and close proximity between the aqueous drugs and •OH. This allowed for drug oxidation rates near 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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Restoration of the endangered Cumberland elktoe (Alasmidonta atropurpurea) and Cumberland bean (Villosa trabalis) (Bivalvia: Unionidae) in the Big South Fork National River and Recreation Area, Tennessee and Kentucky
… juveniles of V. trabalis and E. brevidens in recirculating systems. No differences in juvenile growth or survival were detected among substrates used (fine sediment, coarse sand, and a mixture of the two). Recirculating system design seemed to affect juvenile growth and survival; however, …
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Impact of Premise Plumbing Conditions, Materials, Corrosion Control, Temperature, and Water Heater System Design on the Growth of Opportunistic Pathogens in Drinking Water
… disease originating in potable water plumbing systems (such as Legionnaires' Disease and Nontuberculous Mycobacterial (NTM) infections) continue to increase, it is important to better understand the cause(s), responsible parties and interventions to prevent disease. This dissertation begins …
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Development, Growth, and Behavioral Ecology of Walleye as Influenced by Sublethal Exposure to Dietary Selenium
… South Dakota State University and placed into a recirculating system where performance characteristics were monitored. All groups exhibited conversion to pelleted food after 1 1-d for both years. Survival 3 1 d after removal from ponds varied between years, depending upon condition at harvest …
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Propagation and monitoring of freshwater mussels released into the Clinch and Powell rivers, Virginia and Tennessee
Freshwater mussels (Unionidae) in the United States have experienced dramatic declines, and 25% species are listed as federally endangered. Hence, recovery plans for endangered species proposed a strategy of propagation of young mussels for release to natal rivers to augment declining populations. …