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 85 for “"aquatic species"”.
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Digital holographic imaging of aquatic species
… of capturing three-dimensional (3D) images of aquatic species. The images produced by this system are used in a non-intrusive manner to characterize the abundance, morphology and 3D location of the aquatic species. The DHI system operates by recording the hologram produced by the interference …
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High-throughput sperm cryopreservation of aquatic species
… of high-throughput sperm cryopreservation to aquatic species. The blue catfish Ictalurus furcatus was selected for research due to its role in production of hybrid catfish with eggs from channel catfish Ictalurus punctatus. A high-throughput cryopreservation pathway was developed by …
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Detection, Occupancy, Abundance, and Mercury Accumulation of the Alligator Snapping Turtle (Macrochelys temminckii) in Texas
… and mercury accumulation of a threatened aquatic species (<em>Macrochelys temminckii</em>,<em> </em>i.e., alligator snapping turtle) within the southwestern periphery of its distribution. Hierarchical modeling suggested the distribution of the species is more affected by watershed-scale …
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Control Method for Invasive Aquatic Species introduced via Ballast Water: Effects of Carbon Dioxide Supersaturation on Survivorship of Digesia tigrina (Planaria: Maculata) and Lirceus brachyurus (Isopoda: Crustacea) and Effect of High Hydrostatic Pressure Processing on Freely Suspended and Shellfish Associated T7 Bacteriophage
Control Method for Invasive Aquatic Species introduced via Ballast Water: Effects of Carbon Dioxide Supersaturation on Survivorship of Digesia tigrina (Planaria: Maculata) and Lirceus brachyurus (Isopoda: Crustacea) Survivorship of an aquatic species of planaria (Digesia tigrina) and isopods …
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Evolution of the African Tigerfish (Genus Hydrocynus) : phylogeographic insights into drainage evolution
Aquatic species,notably fish, can reveal details of drainage evolution, especially where their evolutionary relationships can be reconstructed using phylogeographic methods. In this study, the mitochondrial DNA sequence diversity of the characiform genus, Hydrocynus, which is widespread across …
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Distributional Modeling Of Rare Fishes And Mussels: From Ecological Theory To Biodiversity Conservation
… across North America. Nearly 50% of the mussel species and 25% of the fish species in North America are imperiled. Stream habitat degradation has been cited as the principal cause for declines, with anthropogenic land uses being the leading causes of stream degradation. Species distribution …
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Uncertainty analysis in ecological risk assessment modeling
… development. DU potentially poses lower risks to aquatic species at APG as well. The overall risk posed by the metals followed the order of Mo>Cr>Ta for both YPG and APG sits. Blacktailed-jackrabbits, lesser long-nosed bats, mule deer and cactus mice, at YPG site, are expected to have a reduction …
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Toxicity of aliphatic amines on the embryos of zebrafish Danio rerio - experimental studies and QSAR
… model. Further, regression models for other aquatic species such as the fathead minnow Pimephales promelas, Daphnia magna and Tetrahymena pyriformis showed that the toxicity of each species is a good predictor for each other.
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Towards low dose retrospective dosimetry on shelled species
… work investigates calcified tissues of shelled species for retrospective dosimetry using electron paramagnetic resonance (EPR) spectroscopy. To determine applicable samples for low dose studies, shells of crustacean and mollusc species were irradiated to 10 Gy using a 137Cs source. Reference …
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What is the best chemical approach to estimate the bioavailability of pyrethroid insecticides to benthic invertebrates?
… can be correlated to tissue residues of aquatic species, the majority of this research (with a few exceptions) focuses on compounds that are not acutely toxic or biotransformed. Less is known about the potential applicability of these methods to predict bioaccumulation, and ultimately …
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Past precipitation, watershed characteristics, and drought: interactive effects on watersheds of Northern California.
… drinking water resources and stresses vulnerable aquatic species. Watershed properties, such as aspect, elevation, soil type, vegetation composition, and stand age, are known to impact runoff through differences in evapotranspiration and storage. Drought may further change the hydrological …
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An investigation of certain waterfowl food plants and a botanical survey of Back Bay National Wildlife Refuge, Princess Anne County, Virginia
… the Back Bay National Wildlife Refuge about 330 species and varieties of 198 genera from 76 families were found. Of these plants, five are important submerged aquatic water-fowl foods and twenty-four are emergent or marsh food species. The present production of submerged waterfowl food plants is …
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Water From a Stone: The Limits of the Sustainable Development of the Texas Edwards Aquifer
… over protection of threatened and endangered aquatic species has established the limits on the sustainable development of the Edwards (Balcones Fault Zone) Aquifer in south central Texas as the minimum discharges from Comal Springs in New Braunfels, Texas, and San Marcos Springs, in San …
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Study of the Distribution and Variation of the Herbicide Atrazine in Finished Drinking Water at a Small Community Water System in Kentucky
… properties and is an endocrine disruptor in aquatic species even at low concentrations. Atrazine has the ability to be transported through the environment into water bodies due to its physical and chemical properties favoring its occurrence and distribution. Raw and Finished drinking water …
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Investigating patterns in stream temperature and restorable alluvial water storage for climate resilience of freshwater habitat for salmon and trout
… change shifts the availability of habitat for aquatic species, watershed management must focus on the conservation and restoration of cold-water habitats for species such as salmon and trout that require cold water. Management actions that focus on restoring hydrologic processes can be used to …
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Friends in Low Places: Responses of a Benthic Stream Fish to Intra-Guild Alarm Cues
<p>Many aquatic species produce chemical alarm cues that serve as a warning to nearby conspecifics. In mixed-species aggregations, individuals may also benefit by “eavesdropping” on the chemical alarm cues of other species that are in the same prey-guild. Rainbow Darters (Etheostoma caeruleum) are …
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High-Resolution Mapping of Fish Conservation Priorities within the Mobile River Basin
… important as freshwater fishes and associated aquatic organisms are under increasing peril. Human population, growth and subsequent landscape alteration, is degrading water quality and changing the physical characteristics of streams, potentially threatening aquatic species. The goal is to …
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Lipid Productivity of Algae Grown on Dairy Wastewater as a Possible Feedstock for Biodiesel
… gases. Research under the Department of Energy Aquatic Species Program during 1978-1996 concluded that cultivating algae for biofuels was cost prohibitive at that time and that an integrated approach should be studied that combined wastewater treatment with algal biofuel production. Nutrient …
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Characteristics of trappers in Maine, 1976 to 1980
… participated. Fox was the most preferred upland species and muskrat was the most preferred aquatic species. Detailed information was obtained from individuals who trapped in the fall. Effort per day of season was estimated in both trapper-days and average trap-nights. The problems rated highest …
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The Future of Biofuels: An Economic Analysis of the Design and Operation of a Microalgae Facility in Texas and the Southwestern United States
… had been conducted on it as a part of the Aquatic Species Program from the 1970s to the early 1990s. With the emergence of microalgae as a source of alternative energy, the need for an economic analysis of microalgae has arisen. This research studies the economic feasibility of the design …
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