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 83 for “"clam"”.
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Metapopulation dynamics of the softshell clam, Mya arenaria
… connectivity, with a focus on the softshell clam, Mya arenaria. I first worked towards developing a method for using elemental signatures retained in the larval shell as a tag of natal habitat. I designed and implemented an experiment to determine whether existing methods commonly used for …
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Metapopulation dynamics of the softshell clam, Mya arenaria
… connectivity, with a focus on the softshell clam, Mya arenaria. I first worked towards developing a method for using elemental signatures retained in the larval shell as a tag of natal habitat. I designed and implemented an experiment to determine whether existing methods commonly used for …
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Biologically active compounds from a clam and a tunicate
… characterization of sphingosine analogs from the clam Spisula polynyma. Extracts of the Stimpson surf clam, Spisula polynyma, were found to cause a distinct alteration of the morphology of L1210 murine leukemia cells in which the compounds develop sharp points, usually located opposite to each …
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Characterization, utilization and treatment of mechanized clam processing wastes
… to water quality deterioration caused by clam processing effluent, the Virginia State Water Control Board is imposing much greater effluent discharge limitations on the industry. Meeting these limits will require increased wastewater treatment and decreasing the water volume of water used …
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Toxicity of Copper to <I>Mercenaria mercenaria</I> (Hard Clam)
… and metamorphosis without subsampling. Clam larvae, 100 - 150 microns, were held for up to two weeks in small, 30 mm, sealed petri plates during static assays with excellent survival of control organisms, low evaporative losses, and relatively low between replicate variability. An eight …
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The design of scaled robotic end effectors to mimic razor clam burrowing
… digging of Ensis directus, the Atlantic Razor Clam. Modeled after a 0.5x Ensis scale device, the end effectors are 1.0x and 2.0x Ensis scale. The end effectors will be coupled to a pneumatic robotic actuator to explore the nondimensional relationships governing the digging dynamics of razor …
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Treatment of clam-processing wastewater using upflow anaerobic sludge blanket (UASB) technology
… of a laboratory-scale UASB reactor for treating clam-processing wastewater. Virginia state effluent regulations for BOD₅:TSS ranged from 0:0 to 90:90 to as high as 500:500 depending on the facility location. It was found that at a volumetric organic loading rate of 13.8 g COD/L/d the BOD₅ removal …
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It’s clam-plicated: how functional traits influenced extinction patterns of Neogene West Atlantic mollusks
Because mollusks are not only indispensable members of marine ecosystems, but are also essential human food sources throughout much of the world, their patterns of survival under future anthropogenic climate change conditions must be predicted in order to focus conservation efforts. Bivalves and …
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A multidisciplinary study of the Asiatic clam, Corbicula fluminea, from the New River, Virginia
Studies were conducted with the Asiatic clam, Corbicula fluminea, that examined seasonal periodicities in spawning, body condition, and percent tissue water content. In addition, responses of adults to brief (24 hr) and extended (30 d) periods of exposure to toxicants were investigated. These …
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Genetic, Morphological and Ecological Relationships Among Populations of the Clam Shrimp, <i>Caenestheriella gynecia</i>
<p>Little is known about the ecology of the clam shrimp, <em>Caenestheriella gynecia</em>. <em>Caenestheriella gynecia</em> was first discovered in 1939 in a single pool in Oxford, Ohio. Schmidt and Kiviat (2007) reported four new localities of <em>C. gynecia</em> in New York and New Jersey, three …
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Spawning, growth, and spatial distribution of the geoduck clam, Panope generosa Gould, in Hood Canal, Washington,
Thesis (Ph. D.)--University of Washington
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Production of a Population of the Stout Razor Clam (Tagelus plebeius Solander) in a Virginia Estuary
… net secondary production of the stout razor clam, <em>Tagelous plebeius</em>, was estimated at three sites on an intertidal sand flat at Lynnhaven Inlet, Virginia. Samples were taken at six week intervals for one year. The range of net production (P), mean annual biomass (B), and P/B ratios …
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Toxicological, physiological, and behavioral responses of the Asiatic clam, Corbicula sp., to biocidal and copper perturbations
… and ammonia as control agents of the Asiatic clam, Corbicula sp. Control procedures were evaluated based on lethal and sublethal responses (e.g., glycogen, tissue water, dry weight index, and siphoning activity) of clams during 30-day laboratory artificial stream studies. Studies also were …
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Lipoproteins and heat shock proteins as measures of reproductive physiology in the soft shell clam, Mya arenaria
… normal physiological processes of the soft shell clam, Mya arenaria, including reproduction. The distribution of 14c triolein, an injected lipid tracer, occurred rapidly and was unaffected by the early stages of the disease hematopoietic neoplasia. These results, in combination with other …
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Lipoproteins and heat shock proteins as measures of reproductive physiology in the soft shell clam, Mya arenaria
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biology, 1996.
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Characterizing the effects of ocean acidification in larval and juvenile Manila clam, Ruditapes philippinarum, using a transcriptomic approach
… Assessment of larval and juvenile Manila clam mortality and physiology in this study suggests that this species is capable of coping with elevated pCO2 conditions. The use of high throughput sequencing and RNA sequence analysis in larval clams revealed several physiological processes that …
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Effect of Simulated Tidal Patterns on Growth and Growth Line Formation in the Little Neck Clam, PROTOTHACA STAMINEA
… influence in the number of growth lines in the clam Protothaca staminea.</p> <p>Clams were grown under 4 different "tidal" regimes, (0, 1, 2 and 3 tides per day) for forty-one days. Acetate peels of shell cross sections were used for growth line counting. Photomicrographs and measurements showed …
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Aspects of the biology, ecology and fishery of the beaked clam Eumarcia paupercula (Holten, 1802), in Maputo Bay
Clam populations globally have declined, or been depleted, with one of the major causes being uncontrolled human exploitation. This thesis investigates the population structure, growth, reproduction and exploitation of the beaked clam Eumarcia paupercula in Maputo Bay. The substantial commercial …
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