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 45 for “"Filter-feeding"”.
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Factors influencing the uptake and fate of metallic nanoparticles in filter-feeding bivalves
… ecologically susceptible aquatic biota, such as filter- feeding bivalves, which ingest and accumulate a broad range of dissolved- and particulate-phase contaminants. The present study describes a comprehensive approach to prepare and rigorously characterize MetNP test suspensions to facilitate …
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Efficacy of cellular biomarkers in marine filter feeding organisms for detecting effects of anthropogenic pollution
… effects from anthropogenic pollution in marine filter feeding organisms. I focus particularly on the ecological relevance and consistency of biomarker responses over large spatial scales in the presence of multiple stressors, and their potential application for the improved monitoring of current …
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The impact of seasonally changing feeding habits on the secondary production and accumulation of mercury in a filter-feeding Caddisfly
… period on the South River in central Virginia. Feeding nets were observed as early as April and were widespread by May. Nets were virtually absent from late November through March. Gut content analysis revealed seasonal patterns in the consumption of various food items. From April through …
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Unifying ecosystem concepts and mercury biomagnification in an estuarine environment using stable isotopes (delta-carbon-13 and delta nitrogen-15).
… litter, and estuarine oysters; (4) estuarine filter-feeding invertebrates; (5) estuarine deposit-feeding invertebrates; (6) estuarine planktivorous and benthivorous fish, some benthic invertebrates, and two filter-feeding marine fish; (7) estuarine carnivorous and two benthivorous fish; and …
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UTTERBACKIA IMBECILLIS (BIVALVIA: UNIONIDAE) AS A BIOLOGICAL INDICATOR OF COPPER POLLUTION
… distribution, abundance, and sedentary, filter-feeding lifestyle. The present study evaluated the physiological responses of <italic>U. imbecillis</italic> to copper. This heavy metal is an ecologically relevant stressor, as it is a common aquatic pollutant that is particularly toxic to …
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Toxigenic phytoplankton and concomitant toxicity in the mussel Choromytilus meridionalis off the west coast of South Africa in the autumn of 2007
… concentrations and composition of toxins in the filter-feeding mussel Choromytilus meridionalis, was investigated. Several different methods were used to determine toxin concentations in the mussel.
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The Feeding ecology of, and carbon and nitrogen budgets for, sardine sardinops sagax in the Southern Benguela upwelling ecosystem
… and field studies were employed to examine the feeding ecology of sardine Sardinops sagax in order to evaluate conflicting hypotheses regarding the trophic position of clupeoids in upwelling ecosystems, and to compare the trophodynamics of sardine with those of the co-occurring anchovy Engraulis …
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Distribution and Ecological Function of Pacific Lamprey in the San Luis Obispo Creek Watershed
… of harmful bacteria in water through filter-feeding. We found an increased decline of bacteria in experimental aquaria treated with ammocoetes than in control tanks or tanks containing non-filter feeding Pacific lamprey, indicating that ammocoetes can indeed significantly reduce …
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Competitive interactions and community influences among invasive and native fishes at different spatial scales
… carp (Hypophthalmichthys nobilis) are invasive, filter-feeding planktivores that established in the Mississippi River Basin following their unintentional introduction in the early 1970s. Their subsequent expansion has generated much concern about their potential to compete with native fishes due …
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Design & application of novel methods of analysis for monitoring marine biotoxins
… toxins produced by algae that may accumulate in filter feeding bivalve molluscs and seafood and are classified according to their symptomatic characteristics displayed in humans and mammals following consumption. Due to the severity in potency key marine biotoxins are regulated through CODEX …
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Net Productivity On Artificial Reefs In the Mississippi Sound Estimated From Settlement Plate Measurements
… production estimates. Secondary production by filter-feeding invertebrates on the reefs is a potentially important mechanism by which phytoplankton primary production is incorporated into benthic biomass and made available to higher trophic level consumers, including the target fish species …
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Effects of Season, Size and Parasitism by the Acanthocephalan, Profilicollis altmani, on the Carotenoid Concentration and Composition of the Pacific Mole Crab, Emerita analoga
… Pacific Mole crab <em>Emerita analoga </em>is a filter-feeding crustacean inhabiting sandy beaches along the western coasts of North and South America. The tissues of <em>E. analoga</em> contain carotenoids, dietary pigments that are involved in crustacean cryptic coloration and egg development. …
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Biodiversity survey towards conservation of subtidal reef habitats in KwaZulu Natal : biogeography and depth patterns
… localities algae dominated shallower reefs while filter-feeding epifauna were more prevalent at deeper depths. Species richness, evenness and diversity were highest at 10m in the northern coral-dominated region while in the central/south region diversity peaked in the intermediate depth zone (15 - …
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The Short Term Responses of Benthic Macroinvertebrates to the Removal of Riparian Rhododendron in Southern Appalachian Streams
… There was also a significant decrease in filter feeding organisms in the removal reaches. Traits analysis also revealed that several traits that are shared by collector gathers also increased, e.g., short life cycles that are related to the increase in Chironomidae. Using Nonmetric …
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Relationships between invertebrate detritivores and gut bacteria in marine systems
Aspects of the feeding strategies and digestive invertebrate-microbial interactions of two saltmarsh thalassinid detritivores, the mudprawn Upogebia africana (Ortmann) and the sandprawn Callianassa kraussi Stebbing were examined. Resources available in their respective habitats were investigated …
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Feeding morphology of juvenile Utterbackia imbecillis (Bivalvia:Unionidae)
The ontogeny of the feeding morphology of juvenile U. imbecillis was examined to provide information about this relatively little studied stage of unionid mussel development. Glochidia larvae were induced to metamorphose to juveniles by using in vitro culture techniques. Juveniles were reared in a …
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Assessing the use of Viviparus georgianus snails as a means for biomanipulation of cyanobacterial species Microcystis aeruginosa
… species Viviparus georgianus has demonstrated filter-feeding characteristics and can live at high densities in eutrophic lakes. The aim of this thesis is to assess the potential use of this snail species as a potential means for biomanipulation of the cyanobacterial species Microcystis …
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A Study of the Macroinvertebrate Drift in the Des Moines River
… were more numerous below the reservoir were the filter-feeding Trichoptera, Hydropsyche, and Cheumatopsyche. This is apparently a result of the washout of detritus and lentic zooplankton, such as Leptodora, from the reservoir. A positive correlation between numbers in the drift and volume was …
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Characterizing the Microbiome of Scottish Freshwater Pearl Mussels (Margaritifera margaritifera): A Metabarcoding Analysis using Next-Generation Sequencing
… crucial for effective conservation. With their filter-feeding lifestyle exposing them to diverse microbial communities, these mussels serve as an excellent model for investigating host-microbiome interactions. This study provides the first taxonomic characterization of the microbiome in Scottish …
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Use of stable isotope signatures in the macroalga Ecklonia maxima and the filter feeder Mytilus galloprovincialis to determine the extent of sewage dispersal from the Green Point outfall, South Africa
… Ecklonia maxima (for dissolved nutrients) and a filter-feeding organism, the blue mussel Mytilus galloprovincialis (for organic particulates). It was hypothesized that biota within close proximity of the outfall would have isotopic values (signatures) which were closer to the values recorded for …
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