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 16 of 16 for “"resident fish"”.
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Resident fish community impacts on stocked rainbow trout ecology in 15 eastern Washington lakes
… of this research was to analyze the effects of resident fish communities and lake habitat on energy source use and trophic position of stocked rainbow trout. Stable isotope analysis was used to accomplish this goal, with stable carbon isotope ratios indicating the source of carbon, pelagic or …
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Interactive effects of diel-cycling hypoxia, pH, and temperature on growth of Fundulus heteroclitus, a common estuary-resident fish
… significant level of growth compensation when fish exposed to 10 days of treatment (1-11 mg O2 l-1, 6.8-8.1 pH) were returned to normoxia and control pH. However, the high level of individual growth variation following return to normoxia and control pH makes a definitive conclusion on growth …
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Lessons to learn from all out invasion: life history of brown trout (Salmo trutta) in a Patagonian River
… for comparison between sites supporting resident fish with those supporting anadromous fish. Additionally, brown trout and native fish distribution and abundance was described using a combination of local knowledge, angling, electrofishing, and netting. Results indicate that brown trout …
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Lessons to learn from all out invasion: life history of brown trout (Salmo trutta) in a Patagonian River
… for comparison between sites supporting resident fish with those supporting anadromous fish. Additionally, brown trout and native fish distribution and abundance was described using a combination of local knowledge, angling, electrofishing, and netting. Results indicate that brown trout …
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NAKED GOBIES (GOBIOSOMA BOSC) AS INDICATORS OF OYSTER REEF RESTORATION SUCCESS
… bosc</italic>) are the most abundant resident fish on oyster reefs in the Chesapeake Bay and serve as a critical trophic link between the benthic and pelagic communities. Their response to oyster restoration may therefore be a useful indicator of ecosystem functioning. Experiments were …
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Effects of Artificial Reef Implementation on Fish Populations in a Marine Protected Area: Bluefields Bay, Jamaica
Severe overfishing has presented a substantial dilemma in Jamaica. The fish populations within the country's boundaries have been decimated over an extensive period of time. Neighboring Caribbean countries use Jamaica as a worst case scenario as far as fisheries management is concerned. To …
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Population Dynamics and Connectivity Patterns of Adfluvial and Stream-Resident Cutthroat Trout
… of drought, (2) quantify the amount of stream-resident versus adfluvial life histories in an adfluvial spawning tributary, and (3) identify the level of population connectivity between stream-resident and adfluvial components of the population. Chapter 1 shows that stream-dwelling trout were …
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The geochemistry of water-filled sinkholes at Bitter Lake National Wildlife Refuge, Roswell, NM : implications for hydrochemical evolution and trophic support
… biological control in stratified sinkholes. Resident fish populations are affected by water chemistry which reduces reproductive success or exceed the survivable range of habitable conditions. Results of this study may be used to aid with biological resource management and to predict …
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Factors affecting growth and condition of stocked rainbow trout in eastern Washington lakes
… density, presence of largemouth bass, green sunfish, brown trout, and tiger trout negatively affected rainbow trout condition. The collection of significant models suggests that rainbow trout stocked into eastern Washington lakes realize higher growth rates and better condition in the presence …
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Exchange of Mirex between Lake Ontario and its Tributaries
The 1974 discovery of mirex in Lake Ontario fish by Kaiser (1974) triggered a period of intensive study on the substance within the lake ecosystem. Two Lake Ontario tributaries were identified as sources of mirex. The Niagara River is the major source of mirex (366 kg) to Lake Ontario, while the …
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Echolocation in wild killer whales (Orcinus orca)
… with killer whales. Known members of the resident (fish-eating) population were photographically identified 85 times, and transients (mammal eaters) 23 times. Click sounds characteristic of echolocation were identified in the recordings aurally, and by spectrographic and waveform analysis. …
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Habitat selection and movements of diploid and triploid grass carp in a large reservoir
Grass Carp, an herbivorous fish introduced in North America to control aquatic vegetation, has become an increasing ecological threat to aquatic ecosystems they invade. Grass Carp have the potential to cause declines and alterations in aquatic vegetation communities, which in turn can have negative …
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Foraging ecology of two piscivores in woody habitat and effects of their introduction on lake ecosystems
… natural communities. Predation from piscivorous fish is a strong driver of these patterns in freshwater aquatic communities. My research is directed at testing whether the introduction and augmentation of piscivore populations, as well as the alteration of littoral habitats, in Illinois lakes …
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Coal Combustion Residuals in Receiving Lake Ecosystems: Trophic Transfer, Toxicity, and Tracers
… sediment pore waters, biofilm, zooplankton, and resident fish species were collected and analyzed for their trace element profiles by inductively coupled plasma mass spectrometry (ICP-MS). Initial analyses focusing on Se alone revealed significantly higher tissue liver, muscle, and gonad tissue …
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Factors Affecting Mercury Accumulation in South Dakota Fishes
Mercury (Hg) contamination in South Dakota fishes has become an important issue. In recent years, several lakes in South Dakota have been found to contain fish with elevated Hg concentrations and fish consumption advisories have been issued for Bitter Lake (Day County), Twin Lake complex (Highway …