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 20 of 167 for “"Bioaccumulation"”.
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Modelling bioaccumulation and toxicity of metal mixtures
Contains fulltext : 100831.pdf (Publisher’s version ) (Open Access)
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Sources of variability in trace metal bioaccumulation by fish
Bluegill and channel catfish were collected in 1982 from metal-contaminated Peak Creek, Virginia. Whole-body and tissue concentrations of cadmium, lead, and zinc were determined by atomic absorption spectrophotometry. Variations in metal concentrations within each species were related to duration …
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Modelling the fate and bioaccumulation potential of organic chemicals in China
… fate and exposure. Therefore, many fate and bioaccumulation models have been developed in Western countries while progress on the development of tools and legislation are relatively far behind in China. In this thesis, the application of modelling tools in environmental fate and exposure …
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P-glycoprotein and membrane permeability as determinants of xenobiotic bioavailability and bioaccumulation
… function on the disposition, bioavailability and bioaccumulation of environmentally relevant pharmaceuticals, tetracycline and ivermectin, and the carcinogen benzo[a]pyrene in catfish. The pesticide dieldrin and surfactant linear alkylbenzene sulfonate (LAS) were selected as mixture components …
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Understanding environmental influences on bioaccumulation of contaminants of emerging concern among fish species.
… which make traditional tools for assessing bioaccumulation, like log KOW, difficult, as both groups can be ionized at environmentally relevant pHs. Therefore, I aim to better understand how the environment influences bioaccumulation of pharmaceuticals and PFAS among fish species. First, I …
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Dynamic energy budgets and bioaccumulation : a model for marine mammals and marine mammal populations
… availability on individual growth, reproduction, bioaccumulation, and transfer of toxicants between generations. From the coupled model, I create an individual-based model (IBM) of a marine mammal population. I use it to investigate how interactions of food availability, exposure to toxicants, and …
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Dynamic energy budgets and bioaccumulation : a model for marine mammals and marine mammal populations
… availability on individual growth, reproduction, bioaccumulation, and transfer of toxicants between generations. From the coupled model, I create an individual-based model (IBM) of a marine mammal population. I use it to investigate how interactions of food availability, exposure to toxicants, and …
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Mercury Bioaccumulation and Adverse Reproductive Effects in Snapping Turtles Inhabiting a Historically Contaminated River
… animals to quantify the concentrations of Hg bioaccumulation and in doing so eliminate the ability to relate Hg accumulation to observed effects. The development of non-destructive sampling techniques is a critical step for sustainable monitoring of Hg bioaccumulation and associated effects …
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Evaluation of spatial and temporal models to assess the bioaccumulation of trace metals in marine invertebrates
… and other variables were analysed. Additionally, bioaccumulation of the dissolved heavy metals Cd, Cu, Pb and Zn was investigated for C. crangon in laboratory experiments and analysed by means of two-compartment models. The model parameters obtained were verified with independent experimental data …
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Mammalian carnivores as bioindicators to evaluate the exposure and bioaccumulation of organic contaminants in terrestrial ecosystems
… suggesting species- or analogue-dependent bioaccumulation, biomagnification, or metabolism of Dechlorane chemicals in different food webs. My findings, along with previously reported food web models, suggest Dechloranes may possess substantial bioaccumulation and biomagnification potencies …
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The bioaccumulation of persistent contaminants by zebra mussels and their effects on state-endangered common terns
Common terns currently are listed as endangered or threatened in many states, including Illinois, Vermont, Pennsylvania, Ohio, Wisconsin, Michigan, and New York, and a species of special concern by the U.S. Fish and Wildlife Service (USFWS, 2002). The sole remaining nesting colony in Illinois is …
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Selenium Dynamics in Headwater Streams of the Central Appalachian Coalfields: An Investigation of Enrichment and Bioaccumulation
… the degree and dynamics of Se enrichment and bioaccumulation in headwater streams influenced by coal-mining. Based on Se concentrations in macroinvertebrates collected from 23 headwater streams, nine sites were selected for further study: three reference streams with no history of coal-mining, …
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Development of Alternative Methods to Assess the Toxicity and Bioaccumulation Potential of Chemicals in the Aquatic Environment
The toxicity and bioaccumulation potential of chemicals are properties that need to be assessed in risk assessment. In the context of the aquatic environment, both properties were traditionally evaluated in the whole fish. However, due to the reluctance to use a large number of animals for …
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Selenium bioaccumulation and speciation in the benthic invertebrate Chironomus dilutus: an assessment of exposure pathways and bioavailability
… address specific knowledge gaps related to the bioaccumulation of selenium at the benthic-detrital link of aquatic food webs. To fulfill this objective, laboratory and in situ field experiments were conducted using the benthic invertebrate Chironomus dilutus to identify the exposure pathway(s) …
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Effects of lake trophic state and seasonal cycling on production and bioaccumulation of methylmercury in Te Arawa Lakes
… are expected to clarify the distribution and bioaccumulation of Hg and MeHg within lake ecosystems and to elucidate their transfer through the aquatic food web. These results will provide a scientific basis for assessing ecological and human health risks associated with mercury exposure, …
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The application of active and passive bioaccumulation methods to measure metallic and organic pollutants along the Namibian coastline
… that there are clear trends in the spatial and bioaccumulation indicators for elements in mussels at the two study sites. There were also clear differences between the uptake patterns of OCPs in the mussels and the SPMDs. Although analyses for PCBs were done, they were not detected in the SPMDs …
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