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Showing 1 to 20 of 65 for “"Aquatic sciences"”.
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Overwintering abundance and distribution of striped bass (Morone saxtilis) in the Hudson River estuary using hydroacoustic techniques
Using a modification of standard techniques, a target strength to length relationship was developed for white perch (Morone americana) and striped bass (Morone saxtilis). This target strength to length relationship was compared to two standard relationships (Love and Foote). The calculated …
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Evaluation of a fall stocking of adult and intermediate largemouth bass (Micropterus salmoides) into two Ohio River embayments
On October 20, 1998 the West Virginia Division of Natural Resources stocked adult and intermediate size hatchery reared largemouth bass (Micropterus salmoides) into two Ohio River embayments in an attempt to supplement existing populations. Prior to stocking each fish was fitted with an anchor tag …
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Habitat utilization and movement patterns of subadult largemouth bass (Micropterus salmoides) in the Ohio River
Ohio River electrofishing surveys identified embayments as preferred macrohabitat of subadult largemouth bass. Catch rates within macrohabitats were low ranging from 0.00--2.73 subadult bass/hour. Embayment electrofishing CPUE was higher than tributary or main channel except in spring, when …
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Dispersal of Fry and Distribution of Redds Interact to Shape Density Dependence in Winter Steelhead of the Skagit River
The spatial scale of dispersal during early life stages when mortality rates are high is essential for understanding the relationship of the distribution of spawners to population productivity. In this study, we quantified the fine-scale distribution of age-0+ (fry) steelhead (Oncorhynchus mykiss) …
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Spatial population dynamics of brook trout (Salvelinus fontinalis) in a central Appalachian watershed
I examined the spatial population dynamics of brook trout (Salvelinus fontinalis) in a central Appalachian watershed. The objectives of my research were: (1) identify factors that influence reproduction; (2) determine if factors that influence reproduction influence the distribution and abundance …
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Effects of maturation, polyploidy, and nutrition on growth, composition, and gene expression within fatty acid metabolism in rainbow trout
In many cultured fish species, such as salmonids, gonadal development occurs at the expense of stored energy and nutrients, including lipids. Mobilization of intramuscular lipid during gonadal development decreases fillet quality. The aquaculture industry induces triploidy to generate sterile …
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An Ecological Assessment of Restoration Efforts Developed to Recover an Intensively Mined Appalachian Watershed
<p>Assessments of watershed-based restoration efforts are rare. Monitoring of projects pre- and post-treatment are essential for the science of stream restoration ecology to advance. We took an experimental approach, following adaptive watershed management principles, to evaluate the effectiveness …
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Selection of benthic habitat by yellow-phase American eels (Anguilla rostrata)
This thesis examines habitat preference of yellow-phase American eels (Anguilla rostrata) and relationships between age and length with that preference. The thesis is comprised of two chapters: (1) an introduction and literature review on American eel life history, their habitat selection, and the …
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COEXISTENCE, RESILIENCE AND RESISTANCE OF MARINE INVERTEBRATE COMMUNITIES ACROSS A LATITUDINAL GRADIENT
Biogeographic barriers have limit the movement of organisms, leading to speciation and shaping the development of unique regional biotas. Human-aided circumvention of biogeographic barriers, however, has increased the connectivity of isolated biotas, while changes in climate have been altering …
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Ante- and post-mortem factors affect muscle protein functionality from fish
Rainbow trout, Oncorhynchus mykiss, fillets were brined in 8.7 or 17.4% (w/v) sodium chloride solution, respectively, for 30, 60, 90, or 120 min at 3°C. Increased brine concentration decreased brined pH, myosin solubility, brined and cooked moisture content, and water activity, and increased …
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Factors influencing brook trout (Salvelinus fontinalis ) abundance in forested headwater streams with emphasis on fine sediment
The influence and relative importance of fine sediment on wild brook trout (Salvelinus fontinalis) population size was assessed. Brook trout production in headwater streams was inversely proportional to substrate permeability in one of two years, suggesting substrate composition influenced …
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Effects of turbidity on the foraging abilities of brook trout (Salvelinus fontinalis) and smallmouth bass (Micropterus dolomieu)
Sedimentation is the major pollutant of waters in North America. Most research on the effects of increased sedimentation has focussed on its effects on stream habitat and its ramification on the reproductive potential of fish. Although relatively large sediment loads may be necessary to alter …
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Modeling Water Temperatures and Brook Trout (Salvelinus fontinalis) Growth Potential Within a Complex Appalachian Riverscape
Climate change is expected to cause air temperatures to increase 2-5°C in the Appalachians throughout the 21st century. These air temperature increases will cause water temperatures to increase, and may negatively effect cold and cool water fish species. Brook trout are an important game fish …
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Captive propagation, reproductive biology, and early life history of Crystallaria cincotta (Diamond Darter), Etheostoma wapiti (Boulder Darter), E. vulneratum (Wounded Darter), and E. maculatum (Spotted Darter)
Reproductive biology and early life history data are important for understanding the ecology of fishes, and can be used for the management and conservation of rare species. During 2008--2012, a captive propagation study was conducted on Crystallaria cincotta (Diamond Darter), a rare species with a …
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Local and regional controls of brook trout (Salvelinus fontinalis) metapopulation dynamics within a complex Appalachian riverscape
Brook trout have recently become a species of conservation focus due to their unique spatial structure and restricted thermal requirements. These life history characteristics make brook trout particularly vulnerable to major biodiversity threats, such as climate change and habitat loss. For …
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An Evaluation of the Occurrence of Micronuclei and other Nuclear Abnormalities in Fishes from the Great Lakes Basin, United States
… are widely used to identify contamination in the aquatic environment. The "fish tumors or other deformities" biological use impairment (BUI) occurs at 18 of the 30 areas of concern (AOC) located in the Great Lakes basin within the United States. As each AOC evaluates this specific BUI for possible …
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Effects of Culverts on Brook Trout Genetic Diversity
Brook trout (Salvelinus fontinalis) are a species of concern within their native range due to a historical loss of habitat, overfishing, and stocking of non-native salmonids. Road culverts have been recognized as an additional impediment to population persistence as movement between diverse habitat …
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Combined effects of water chemistry, canopy cover, and stream size on benthic macroinvertebrates along a Central Appalachian stream continuum
I sampled benthic macroinvertebrates along a 25.2 km stream continuum in the Central Appalachian Mountains of West Virginia from May---October 2000. Six components of macroinvertebrate community structure and function were measured: density, biomass, richness, community taxa similarity, feeding …
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Geology, surface hydrology, and fish habitat relationships in the upper Shavers Fork drainage basin, West Virginia
Shavers Fork is the mainstem stream of a unique upper elevation watershed located in the Appalachian Plateaus province of West Virginia. Surficial "facies" mapping of in-stream and floodplain-adjacent landforms helped to classify small-scale flow patterns into heterogeneous and homogeneous channel …
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Effects of sediment upon benthic macroinvertebrates in forested northern Appalachian streams
Excess fine sediment negatively influences the fauna of North American streams. With the current emphasis on multiple-use forests, the question is not whether fine sediment is detrimental, but what is the threshold of fine sediment that is tolerable?;To determine a threshold tolerance of fine …
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