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Dissertations / Theses on the topic 'Aquatic microbiology'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

Castilho, Ivana Giovannetti [UNESP]. "Qualidade microbiológica do ambiente e da tilápia-do-Nilo (Oreochromis niloticus) produzida em sistema de tanques-rede no reservatório de Chavantes, SP." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/87790.

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Made available in DSpace on 2014-06-11T19:23:01Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-02-29Bitstream added on 2014-06-13T20:49:47Z : No. of bitstreams: 1 castilho_ig_me_botib.pdf: 337909 bytes, checksum: 0470c57c1b16f864f2fba4df4a772a2e (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>A piscicultura é o setor mais popular da aquicultura e o Brasil tem grande potencial para desenvolvimento da atividade devido às características do país e ao aumento no consumo de peixes. O reservatório de Chavantes, no Médio Rio Paranapanema, possui diversas pisc

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2

Castilho, Ivana Giovannetti. "Qualidade microbiológica do ambiente e da tilápia-do-Nilo (Oreochromis niloticus) produzida em sistema de tanques-rede no reservatório de Chavantes, SP /." Botucatu, 2012. http://hdl.handle.net/11449/87790.

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Orientador: Vera Lucia Mores Rall<br>Banca: José Paes de Almeida Nogueira Pinto<br>Banca: Reinaldo José da Silva<br>Resumo: A piscicultura é o setor mais popular da aquicultura e o Brasil tem grande potencial para desenvolvimento da atividade devido às características do país e ao aumento no consumo de peixes. O reservatório de Chavantes, no Médio Rio Paranapanema, possui diversas pisciculturas de tanques-rede com criação de tilápias. No entanto, esses sistemas são intensivos com altas densidades de estocagem e de fornecimento de ração, o que pode ser prejudicial para a qualidade da água e saú

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3

Davies, A. R. "The role and physiology of aquatic minibacteria." Thesis, Cardiff University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373878.

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4

Hill, Susannah Margaret. "Analysis of tellurite resistance in aquatic bacteria." Thesis, University of Liverpool, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329467.

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5

Lu, Xinxin. "Microbially Mediated Transformation of Dissolved Nitrogen in Aquatic Environments." Kent State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=kent1429540424.

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6

Davis, Katie Sarah. "Biodiversity of aquatic oomycetes in the Falkland Islands." Thesis, University of Aberdeen, 2016. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=231638.

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Oomycetes are a diverse group of organisms with worldwide distribution. The phylum contains a large number of pathogenic species which cause immense damage to both animal and plant host species in cultured, managed and wild ecosystems. As such, the majority of research is focused on host-pathogen interactions and the environmental study of oomycetes is greatly neglected. However, due to their devastating economic and ecological effects it is becoming increasingly clear that oomycete ecology and diversity studies are vital to the monitoring and management of diseases caused by oomycete species.

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7

Albergaria, Furtado Semedo Miguel. "Animal Waste and Antibiotic Impacts on Microbial Denitrification in Terrestrial and Aquatic Ecosystems." W&M ScholarWorks, 2019. https://scholarworks.wm.edu/etd/1582642568.

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The global increase in livestock and poultry production observed in the last decades has led to an increase in animal waste generated. The animal waste contains high levels of nitrogen and may carry antibiotics that can disturb important microbial activities such as denitrification in terrestrial and aquatic ecosystems. Disturbances of microbial denitrification can have detrimental consequences to environmental health. In the terrestrial environment, denitrification is an important source and sink of N2O, a potent greenhouse gas in the atmosphere. In aquatic ecosystems, denitrification is a do

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8

Gilfillan, Dennis, Timothy Andrew Joyner, and Phillip R. Scheuerman. "Maxent Estimation of Aquatic Escherichia Coli Stream Impairment." Digital Commons @ East Tennessee State University, 2018. https://dc.etsu.edu/etsu-works/5480.

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Background: The leading cause of surface water impairment in United States’ rivers and streams is pathogen contamination. Although use of fecal indicators has reduced human health risk, current approaches to identify and reduce exposure can be improved. One important knowledge gap within exposure assessment is characterization of complex fate and transport processes of fecal pollution. Novel modeling processes can inform watershed decision-making to improve exposure assessment. Methods: We used the ecological model, Maxent, and the fecal indicator bacterium Escherichia coli to identify environ

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9

Surman, Susanne Barbara. "The integration of an avirulent Legionella pneumophila into aquatic biofilms." Thesis, University of Central Lancashire, 1994. http://clok.uclan.ac.uk/1773/.

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A continuous culture model system was set up in the laboratory and inoculated with a diverse range of microorganisms, including several bacteria and protozoa, obtained from the local mains water tap supply. This inoculum and was added to the system without any prior culture or other selection process. Biofilms readily developed on glass tiles suspended in the planktonic phase of the system. An avirulent Legionella pneumophila was inoculated into the system and was subsequently isolated from both biofilms and also from the aqueous(planktonic) phase of the chemostat. The attenuation of this stra

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10

Loh, Chi Leong. "The hollow fiber diffusion system: A novel method for the in situ survival studies in the aquatic environment." Thesis, University of Ottawa (Canada), 1994. http://hdl.handle.net/10393/6875.

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The Hollow Fiber Diffusion (HFD) system is a novel approach for the in situ study of the survival of bacteria and viruses in the aquatic environment. The HFD system employs a tangential flow, hollow fiber cartridge with a large area $(7 \times 10\sp3$ cm$\sp2$) of exchange surfaces for diffusion. When compared with diffusion chambers, the HFD system responded significantly faster and more accurately to changes in pH, Eh, nutrient concentrations and to the presence of disinfectants in the external aqueous environment. The T$\sb$ diffusion of low molecular weight substrates was 0.6 h for t

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11

Gilfillan, Dennis, Timothy A. Joyner, and Phillip Scheuerman. "Maxent Estimation of Aquatic Escherichia Coli Stream Impairment." Digital Commons @ East Tennessee State University, 2018. https://dc.etsu.edu/etsu-works/5587.

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Background.The leading cause of surface water impairment in United States’ rivers and streams is pathogen contamination. Although use of fecal indicators has reduced human health risk, current approaches to identify and reduce exposure can be improved. One important knowledge gap within exposure assessment is characterization of complex fate and transport processes of fecal pollution. Novel modeling processes can inform watershed decision-making to improve exposure assessment.

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12

Murray, Aimee Kaye. "Selection for antibiotic resistance in the aquatic environment : novel assays to detect effect concentrations of micropollutants." Thesis, University of Exeter, 2017. http://hdl.handle.net/10871/30325.

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The environment is increasingly recognised as a key player in the emergence and mobilisation of antibiotic resistance, which negatively impacts human health, healthcare systems, and farming practices worldwide. Recent work has demonstrated concentrations of antibiotics in the natural environment may select for resistance in situ, but a scarcity of meaningful data has prevented rigorous environmental risk assessment of antibiotics. Without such data, mitigation strategies, such as improved antibiotic stewardship or environmental discharge limits, cannot be effectively designed or implemented. T

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13

Smith, Garrett J. "Microbial contributions to carbon, nitrogen, and greenhouse gas cycling in freshwater terrestrial-aquatic interfaces." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1575380962535345.

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14

Marti, Serrano Elisabet. "Occurrence of antibiotic resistance genes in aquatic microbial communities exposed to anthropogenic activities." Doctoral thesis, Universitat de Girona, 2014. http://hdl.handle.net/10803/671847.

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The overuse of antibiotics has led to the selection of resistant strains. This thesis investigated the occurrence of antibiotic resistance genes (ARGs) in aquatic microbial communities influenced by anthropogenic activities. In this study, qPCR assays were designed to quantify the plasmid-mediated quinolone resistance in environmental samples. Then, several ARGs conferring resistance to several groups of antibiotics were quantified in biofilms and sediments from a wastewater treatment plant (WWTP) discharge point and the receiving river. Ciprofloxacin-resistant strains were also isolated an

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15

Cregger, S. S., and Phillip R. Scheuerman. "A Rapid Biochemical Test Using Cell Lines for Measuring Chemical Toxicity in Aquatic Systems." Digital Commons @ East Tennessee State University, 1993. https://dc.etsu.edu/etsu-works/2896.

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16

Li, Wei. "INFLUENCE OF ENVIRONMENTAL DRIVERS AND INTERACTIONS ON THE MICROBIAL COMMUNITY STRUCTURE IN PERMANENTLY STRATIFIED MEROMICTIC ANTARCTIC LAKES." Miami University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=miami1469757316.

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17

Van, Gray Jonathon B. "Disturbance effects on assembly and recovery dynamics of freshwater microbial biofilm communitieis." Kent State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=kent1556556989587688.

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18

Roberto, Alescia. "METAL EFFECTS ON FRESHWATER MICROBIAL COMMUNITY COMPOSITION, STRUCTURE, AND FUNCTION IN AN URBAN STREAM." Kent State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=kent1543839535987157.

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19

Pokhrel, Lok R., Thilini Silva, Brajesh Dubey, Badawy Amro M. El, Thabet M. Tolaymat, and Phillip R. Scheuerman. "Rapid Screening of Aquatic Toxicity of Several Metal-Based Nanoparticles Using the Metplate™ Bioassay." Digital Commons @ East Tennessee State University, 2012. https://dc.etsu.edu/etsu-works/2873.

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Current understanding of potential toxicity of engineered nanomaterials to aquatic microorganisms is limited for risk assessment and management. Here we evaluate if the MetPLATE™ test can be used as an effective and rapid screening tool to test for potential aquatic toxicity of various metal-based nanoparticles (NPs). The MetPLATE bioassay is a heavy metal sensitive test based on β-galactosidase activity in Escherichia coli. Five different types of metal-based NPs were screened for toxicity: (1) citrate coated nAg (Citrate-nanosilver), (2) polyvinylpyrrolidone coated nAg (PVP-nAg), (3) uncoate

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20

Craig, C. L., Phillip R. Scheuerman, G. R. Lanza, and J. L. Farris. "The Effects of Water Quality Changes Due to Highway Construction on Aquatic Insects as Measured by the DHA-INT Assay." Digital Commons @ East Tennessee State University, 1993. https://dc.etsu.edu/etsu-works/2897.

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21

Young, Suzanne M. "The Ecology of Antibiotic Resistance: Sources and Persistence of Vancomycin-Resistant Enterococci and Antibiotic Resistant Genes in Aquatic Environments." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/7112.

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The growing crisis of antibiotic resistance is a major threat to ecosystems and human health. Infections caused by known and emerging antibiotic resistant pathogens are on the rise globally, with approximately 700,000 deaths per year caused by antibiotic resistant bacteria (1). In the United States, infections from antibiotic resistant bacteria cause more than 2 million illnesses and 23,000 deaths (2). Antibiotic resistant bacteria and antibiotic resistance genes are released into aquatic ecosystems through hospital waste, residential sewer lines and animal agricultural was

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22

Knackstedt, Kathryn Ann. "Rivers as Sources of Freshwater Ice-Nucleating Particles." Bowling Green State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1498766754881706.

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23

Galvão, Juliana Antunes. "Qualidade microbiológica da água de cultivo e de mexilhões Perna perna (Linnaeus, 1758) comercializados em Ubatuba, SP." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/11/11141/tde-16092004-164101/.

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O consumo de moluscos bivalves pode representar sérios riscos à saúde pública, pois refletem diretamente as condições do meio ambiente. Desta forma considera-se de extrema importância o consumo de mexilhões livres de contaminação. Esta pesquisa objetivou estudar a qualidade microbiológica das águas e mexilhões de três pontos de cultivo do município de Ubatuba, SP, a saber: Engenho da Almada, Barra Seca e Costão do Cedro em um período compreendido entre novembro de 2002 e março de 2003, totalizando 5 coletas mensais. Analisou-se na água: Bacillus cereus, Clostrídios Sulfito Redutores, Aeróbios

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24

Cariani, Zev. "Impact of simulated polar night on Antarctic mixotrophic and strict photoautotrophic phytoplankton." Miami University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=miami1547204599969081.

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25

Mukherjee, Maitreyee. "Identification, enumeration, and diversity of ammonia-oxidizing archaea in the Laurentian Great Lakes." Bowling Green State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1368022892.

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26

Mosier, Damon Kurtis. "USING SINGLE-CELL SORTING, FISH AND 13C-LABELING TO CULTIVATE AND ASSESS CARBON SUBSTRATE UTILIZATION OF ‘AIGARCHAEOTA’ AND OTHER NOVEL THERMOPHILES." CSUSB ScholarWorks, 2019. https://scholarworks.lib.csusb.edu/etd/930.

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‘Aigarchaeota’, a deeply branching lineage in the domain Archaea with no cultivated representatives, includes both thermophilic and hyperthermophilic microorganisms that reside in terrestrial and marine geothermal environments. The ‘Aigarchaeota’ consists of at least nine proposed genus-level groups that have been confirmed via 16S rRNA sequencing, with ‘Aigarchaeota’ Group 1 (AigG1) being the focus of this study. Based on cultivation-independent genomic data available from several AigG1 members in Great Boiling Spring (GBS), NV, and Yellowstone National Park, 22 different types of growth medi

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27

Otte, Hillary K. "CONTROL AND PASSIVE TREATMENT OF RUNOFF FROM HORSE MUCK STORAGE STRUCTURES USING RAIN GARDENS." UKnowledge, 2012. http://uknowledge.uky.edu/forestry_etds/11.

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Runoff from livestock operations may contain a variety of pathogens and high levels of nutrients and other harmful contaminants, and is of particular concern in central Kentucky as watersheds are threatened by waste generated from a high concentration of equine activity. Rain gardens are a type of stormwater management tool used to capture and passively treat runoff. This project aimed to incorporate rain gardens into the horse muck storage structures at a thoroughbred facility in the Canr Run watershed in Lexington, Kentucky. Water quality data from soil water within two rain garden muck pads

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28

D'souza, Nigel A. "Psychrophilic diatoms in ice-covered Lake Erie." Bowling Green State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1332431260.

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29

Kotkowski, Rachel. "Environmental Influences on Bacterio-phytoplanktonic Coupling and Bacterial Growth Efficiency in a Sub-tropical Estuary." FIU Digital Commons, 2014. http://digitalcommons.fiu.edu/etd/1155.

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Bacterio-phytoplanktonic coupling and bacterial growth efficiency (BGE) measurements were used to analyze microbial trophic dynamics and the influence of environmental factors in Florida Bay, Florida. Phytoplankton gross primary productivity (GPP) was measured using 24-hour in situ oxygen incubations; bacterial productivity (BP) was measured using 3H- thymidine incorporation. Weak bacterio-phytoplanktonic coupling was observed over the sampling period. BP was more influenced by local total nitrogen concentrations while GPP was more evenly distributed. BGE rates were low but consistent with mar

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Ghosh, Suchismita. "UTILIZATION OF DIFFERENT FORMS OF NITROGEN BY HETEROTROPHIC BACTERIA UNDER VARYING ORGANIC CARBON CONCENTRATIONS: FROM ISOLATES TO COMMUNITIES." Kent State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=kent1374844259.

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31

Brown, Tanya. "Phenomenological and Molecular Basis of the Cnidarian Immune System." FIU Digital Commons, 2017. http://digitalcommons.fiu.edu/etd/3468.

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Coral reefs are one of the most diverse ecosystems on the planet due partially to the habitat structure provided by corals. Corals are long lived organisms that can live for hundreds of years and as a result growth of many species is very slow. As a result of this, recovery of corals from disease outbreaks is very slow and difficult and therefore the ecosystem is deteriorating rapidly. Due to this increase in disease and its detrimental effect on coral reefs, it has become imperative to study how corals respond to disease outbreaks. The response of the coral to pathogens is believed to be cont

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32

Servais, Shelby M. "Changes in Soil Microbial Functioning in Coastal Wetlands Exposed to Environmental Stressors and Subsidies." FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3821.

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Environmental perturbations are ubiquitous features of ecosystems and shape ecological structure and function. Climate change will alter the intensity and frequency of disturbances and expose ecosystems to novel combinations of useful inputs (subsidies) and harmful inputs (stressors). Coastal wetlands are particularly vulnerable to changing environmental conditions and are increasingly exposed to effects of interacting subsidies and stressors. In particular, the Florida Coastal Everglades, which has experienced accelerated change due to a history of water management practices, is vulnerable to

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33

Akins, Leighannah. "Understanding the relationship between bacterial community composition and the morphology of bloom-forming Microcystis." Kent State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=kent1543502274681124.

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34

Martindale, Jane. "Genetics of gas vacuolation in Ancylobacter aquaticus." Thesis, University of Bristol, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390146.

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35

Gordon, Skyler A. "An Assessment of Potential False Positive E.coli Pyroprints in the CPLOP Database." DigitalCommons@CalPoly, 2017. https://digitalcommons.calpoly.edu/theses/1730.

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The genetic information found in each species of organism is unique, and can be used as a tool to differentiate at the molecular level. This has caused rapid genotyping methods to become the cornerstone of a new area of research dependent on reading the genome as a form of identification. One of these specific identification methods, known as pyroprinting, relies on the small variation of DNA sequences within the same species to develop a unique, reproducible fingerprint. By simultaneously pyrosequencing multiple polymorphic loci within the ribosomal operons known as the intergenic transcribed

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36

Ouattara, Koffi Nouho. "Etude et modélisation de la contamination fécale des rivières du bassin de l'Escaut." Doctoral thesis, Universite Libre de Bruxelles, 2012. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209685.

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Le bassin versant de l’Escaut (20 000 km²) est caractérisé par forte densité de population (plus de 500 habitants par km2) et une activité agro-pastorale intensive. Les rivières de ce bassin sont sévèrement affectées par les rejets d’eaux usées domestiques, les effluents d’élevage et les eaux de ruissellement des sols agricoles. Le but de cette étude est :(i) d’évaluer la qualité microbiologique de ces rivières ;(ii) d'identifier et de quantifier les différentes sources de contamination fécale à l’échelle du bassin de l’Escaut; (iii) d’étudier les processus qui contrôlent le devenir des bactér

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37

Madhuri, Sumeda. "Polyamine Transformation by Bacterioplankton in Freshwater Ecosystems." Kent State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=kent150114771851742.

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Warhurst, Billy Christopher. "Effects of Elevated Salinity and Oxidative Stress on the Physiology of the Toxigenic Cyanobacterium Microcystis Aeruginosa." UNF Digital Commons, 2014. http://digitalcommons.unf.edu/etd/523.

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Harmful algal blooms (HABs) are found worldwide, particularly in places where warm, well-lit, and stagnant waters are common. HABs can have negative effects on aquatic plants and wildlife due to the reduction in light availability associated with turbidity, decrease in O2 availability, and the production of secondary metabolites that can harm or even prove lethal. Aquatic ecosystems are regularly being affected by elevated salinity because of recent water management strategies, episodes of drought, and salt water intrusion. This research focused on how salinity levels ranging from 0-10ppt affe

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Fyffe, Deanna Lynne. "Methods to Monitor Lake Erie's Harmful Algal Blooms: A Fellowship with the Cooperative Institute for Great Lakes Research." Miami University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=miami1511971289649061.

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Rodriguez-Palacios, Alexander. "Ecology and Epidemiology of Human Pathogen Clostridium difficile in Foods, Food Animals and Wildlife." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1313582304.

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Ormiston, Anna Kathleen. "ENVIRONMENTAL, SPATIAL AND TEMPORAL EFFECTS ON MICROBIAL COMPOSITION IN LAKE ERIE." Kent State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=kent1461444253.

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42

Basile, Daniela Rodrigues Silva [UNESP]. "Ecotoxicidade e eficácia de sanitizante na redução de Aeromonas hydrophila na água de cultivo e pele de Oreochromus niloticus." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/94613.

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Made available in DSpace on 2014-06-11T19:27:16Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-12-19Bitstream added on 2014-06-13T19:14:31Z : No. of bitstreams: 1 basile_drs_me_jabo.pdf: 758354 bytes, checksum: a2a046dd21b1f6d30060647b68f603d7 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>O objetivo do estudo foi determinar a toxicidade aguda do sanitizante (composto por glutaraldeído e cloreto de dimetil cocobenzil amônio) para tilápias (Oreochromis niloticus) e verificar a eficácia do produto utilizado na redução da população de bactérias do gênero

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Basile, Daniela Rodrigues Silva. "Ecotoxicidade e eficácia de sanitizante na redução de Aeromonas hydrophila na água de cultivo e pele de Oreochromus niloticus /." Jaboticabal, 2011. http://hdl.handle.net/11449/94613.

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Orientador: Oswaldo Durival Rossi Junior<br>Coorientador: Claudinei da Cruz<br>Banca: Luiz Augusto do Amaral<br>Banca: Leticia Ane Sizuki Nociti<br>Resumo: O objetivo do estudo foi determinar a toxicidade aguda do sanitizante (composto por glutaraldeído e cloreto de dimetil cocobenzil amônio) para tilápias (Oreochromis niloticus) e verificar a eficácia do produto utilizado na redução da população de bactérias do gênero Aeromonas presentes na pele dos peixes e na água de criação por contaminação experimental. Para os testes de toxicidade aguda, os animais foram expostos a 0,01, 0,02, 0,03 e 0,0

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Franceschini, Lidiane [UNESP]. "Infecções parasitárias e microbianas na produção do pacu Piaractus mesopotamicus e do híbrido patinga procedentes da região noroeste do Estado de São Paulo." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/99444.

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Made available in DSpace on 2014-06-11T19:30:13Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-02-27Bitstream added on 2014-06-13T19:39:32Z : No. of bitstreams: 1 franceschini_l_me_botib.pdf: 588829 bytes, checksum: 796cb08752fb62d3915ad06ac0d6aa82 (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>O desenvolvimento das atividades relacionadas à aquicultura tem aumentado consideravelmente a relevância dos estudos sobre parasitas e outros patógenos de organismos aquáticos, principalmen

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Franceschini, Lidiane. "Infecções parasitárias e microbianas na produção do pacu Piaractus mesopotamicus e do híbrido patinga procedentes da região noroeste do Estado de São Paulo /." Botucatu : [s.n.], 2012. http://hdl.handle.net/11449/99444.

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Orientador: Reinaldo José da Silva<br>Coorientador: Sérgio Henrique Canello Schalch<br>Banca: Eduardo Makoto Onaka<br>Banca: Maurício Laterça Martins<br>Resumo: O desenvolvimento das atividades relacionadas à aquicultura tem aumentado consideravelmente a relevância dos estudos sobre parasitas e outros patógenos de organismos aquáticos, principalmente, daqueles hospedeiros com potencial para o cultivo e comercialização. O objetivo deste estudo foi avaliar a ocorrência de infecções parasitárias e microbianas na produção de pacu Piaractus mesopotamicus e do híbrido "patinga" (P. mesopotamicus x P

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46

Hispano, Vilaseca Coral. "Avaluació d'una infestació de Gnathia maxillaris (Montagu, 1804) (Crustacea:Isopoda:Gnathiidae), a partir del seguiment i eradicació d'un brot a un sistema d'aquaris de grans dimensions." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/385111.

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Gnathia maxillaris és un isòpode marí ectoparàsit hematòfag de peixos. Diferents brots d’infestacions han estat descrits en animals salvatges i més recentment en sistemes de producció de l’aqüicultura o en tancs d’exhibició d’aquaris. El control d’aquests brots o l’aplicació de mesures o programes d’eradicació resulten molt complexos degut a que el seu cicle biològic ha estat només parcialment descrit, no es disposa d’un coneixement detallat sobre l’ecologia de l’espècie i no existeix informació sòlida sobre tractaments terapèutics o preventius específics per aquesta parasitosi. En aquest treb

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Williamson, Heather. "Distribution of Mycobacterium ulcerans in Aquatic Environments in Ghana." 2008. http://etd.utk.edu/2008/August2008Dissertations/WilliamsonHeatherRose.pdf.

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Ward, Christopher Spencer. "Microbial Community Responses to Natural and Anthropogenic Disturbances in Aquatic Ecosystems." Diss., 2015. http://hdl.handle.net/10161/11354.

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<p>Aquatic ecosystems are highly dynamic environments, suggesting that resident microbial communities to respond and adapt to these environmental changes. However, despite the frequency of disturbances in aquatic ecosystems such as annual cycles in environmental parameters and episodic storm events, few studies have examined the impacts of disturbances on aquatic microbial communities. In this dissertation, I investigate community- and taxon-level responses to natural and anthropogenic disturbances in the coastal ocean and wetland mesocosms using ribosomal RNA gene library sequencing. In my fi

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Stout, Lisa M. "Influence of plant-associated microbial communities on heavy metal uptake by the aquatic plant Lemna minor." 2006. https://scholarworks.umass.edu/dissertations/AAI3242356.

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We present research aimed at determining how bacteria associated with aquatic plants influence phytoextraction of heavy metals. We focused on the aquatic plant Lemna minor and its response to cadmium (Cd) as a model. We studied bacterial communities from plants at a contaminated site, Rice City Pond (RCP), and plants provided by the U.S. Environmental Protection Agency (EPA) that had not been exposed to Cd. Initially, we performed comparative studies of the bacterial communities from these plants, with or without Cd addition, by analysis of 16S rRNA genes. We also studied Cd tolerance in both

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Hipsey, Matthew Richard. "Dynamics of microbial pollution in aquatic systems." 2007. http://hdl.handle.net/2440/37890.

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Microbial pollution of surface waters and coastal zones is one of the foremost challenges facing the water industry and regulatory authorities. Yet despite the concern and increasing pressures on water resources in both developed and developing countries, understanding of microbial pollutants in the aquatic environment is fairly scattered. There is a need for an improved ability to quantify the processes that control the fate and distribution of enteric organisms to support decision - making and risk management activities. The aim of this thesis has been to advance the understanding of the dyn

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