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No report for this QR project is available at this time. This project initially set out to expose snakeheads and flathead catfish (2 invasive fishes) to electric fields in a controlled laboratory study. This turned out to be not feasible for two reasons. Permits to hold the right species of snakeheads on campus could not be obtained, and flathead catfish of appropriate sizes that had not been previously exposed to electric fields (i.e., not captured by electrofishing) could not be attained. The objectives (and timeline) were revised to focus on food web relations for snakeheads and flathead catfish, specifically: (a) Determine trophic level and sources of prey for northern snakeheads collected from the Potomac...
Advancing the knowledge of freshwater mussel conservation: examining the role of manganese on recent mussel die-offs and enigmatic declines
Native freshwater mussels of the family Unionidae are experiencing high imperilment status due to habitat alteration and destruction, pollution and poor water quality, and the introduction of aquatic invasive species. The Southeastern, Mid-Atlantic, and Midwestern regions of the United States contain the greatest biodiversity of native freshwater mussels in the world and are now at even greater risk from the continued stresses of human-mediated changes to the landscape through urban and rural development, mining activities, climate change, nutrient influx and their associated impacts to water and sediment quality. The specific objectives of this study are to (1) Compare the relative sensitivity of early life stages...
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The overall goal of this SSP project was to evaluate the exposure and toxicological effects of contaminant stressors in the water and sediment of the Clinch River in areas of high mussel decline in Virginia and in areas of high abundance and recruitment in Virginia and Tennessee. The investigation also included an assessment of major tributary streams with varied histories of degradation, recovery and disturbance. The specific objectives of this project were to: 1. Integrate existing data sets on mussel populations, NPDES discharges, mining and other energy permitted activities, pesticide use, and land use. 2. Using passive sampling devices, measure water concentrations of a suite of polar and non-polar organic...
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