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 12 of 12 for “"hydrilla"”.
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Growth and root inhibition in Axenic hydrilla verticillata cultures
Hydrilla verticillata Royle is a submersed aquatic weed infesting waterways throughout the world. Hydrilla was introduced into the United States in 196 and has spread across the southern states. Hydrilla has extensive reproductive capacity, spreading by seeds, axillary and subterranean vegetative …
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Trihalomethane-precursor production by Hydrilla verticillata in the Occoquan Reservoir
This project reviewed the ability of hydrilla to release THM-precursors should this plant become established in the Occoquan Reservoir. It was found that the Occoquan Reservoir could support hydrilla. Three sources of THM-precursors were found to result from hydrilla. These included: 1) …
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Analysis of Grass Carp Dynamics to Optimize Hydrilla Control in an Appalachian Reservoir
… carp Ctenopharyngodon idella stocked to control hydrilla Hydrilla verticillata in a riverine reservoir (Claytor Lake, Virginia), 2) to examine grass carp population dynamics and hydrilla growth dynamics in Claytor Lake to guide long-term management efforts, and 3) to describe the aquatic plant …
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The Effects of Hydrilla Infestation on Selected Wintering Waterfowl: Santee Copper Lake System, South Carolina
<p>Hydrilla is an exotic aquatic weed that was introduced into Florida in the 1950's. Since that time it has spread rapidly from lake to lake throughout the southeast and beyond. The Santee Cooper lake system in eastern South Carolina was infested with the weed in the early 1980's. Since that time …
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Consideration of biotype to improve invasive species management
… global forecasts for invasive aquatic plant hydrilla (Hydrilla verticillata). To observe if hydrilla biotype influence SDMs, forecasts were produced and compared using data partitioned by biotype and all known hydrilla data. Further, differences in desiccation response between biotypes were …
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Consideration of biotype to improve invasive species management
… global forecasts for invasive aquatic plant hydrilla (Hydrilla verticillata). To observe if hydrilla biotype influence SDMs, forecasts were produced and compared using data partitioned by biotype and all known hydrilla data. Further, differences in desiccation response between biotypes were …
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Selection and Use of Aquatic Vegetation by Migratory Waterfowl in North Central Texas
… January. Mixed native ponds and mixed native/hydrilla ponds were the most frequently selected habitat types. The study included correlation analysis between pond water levels and waterfowl use. Full ponds received greatest use followed by half full ponds, while almost empty ponds received …
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Food habits of nutria (Myocastor coypus) at Spring Lake, Hays County, Texas
… of the diet: coontail (Ceratophyllum demersum), hydrilla (Hydrilla verticillata), and fanwort (Cabomba caroliniana). Results of Chisquare analysis with related confidence intervals suggest that nutria ate coontail and fanwort more than expected and hydrilla less than expected.
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Behavior and population dynamics of grass carp incrementally stocked for biological control
… control invasive, aquatic weeds such as hydrilla Hydrilla verticillata. Despite the large body of research surrounding the use of grass carp, few studies have demonstrated widely applicable methods for evaluating the success of weed control based on grass carp behavior and population …
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A Physiological Age-Grading System for Female Hydrellia pakistanae Deonier (Diptera: Ephydridae)
… H. pakistanae as a biological control agent for hydrilla prompt researchers to find a method for assessing the fly's success. Developing a physiological age-grading system for the fly using ovarian morphology to detect changes in reproductive activity is useful for evaluating reproductive status …
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Environmental Determinants of Stigonematales In A Southeastern Reservoir.
… fluoride, chloride, nitrate, sulfate, phosphate, hydrilla abundance and previous Stigonematales abundance. Measurements (dissolved oxygen, water temperature) or water samples (turbidity, nutrient content) were taken at three different depths: one surface reading (epilimnion), one reading at 1 …
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Feeding Ecology of Invasive Catfishes in Chesapeake Bay Subestuaries
… contained other invasive species, primarily Hydrilla verticillata and Asian clams Corbicula fluminea. Canonical Correspondence Analysis (CCA) revealed that salinity and season explained the most variation in Blue Catfish diet, while Generalized Additive Models (GAMs) demonstrated that there …