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 22 for “"Invasive fish"”.
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Invasive fish effects on the invertebrate constituents of wetland communities
… of this research was to assess the impacts of invasive fishes on wetland communities. Within this study we explored fish effects on the invertebrate constituents of these wetlands, and possible niche overlap of fish and dabbling waterfowl using stable isotope analysis. Brook stickleback (Culaea …
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Non-structural Deterrents and Opportunistic Dispersal in an Invasive Fish: The Role of Among-Individual Variation on Common Carp Movement
… ecology to invasion biology. Using an invasive fish, Common Carp (Cyprinus carpio), as my study species, I examined the influence of among-individual behavioural variation on opportunistic dispersal and on the effectiveness of non-structural deterrents - methods used to limit the …
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Effects of interspecific competition, salinity, and hurricanes on the success of an invasive fish, the Rio Grande cichlid (Herichthys cyanoguttatus)
… at least 20 years. It is often the most common fish species in urban canals and has also been found in natural waterways outside of the GNOMA. The effects and potential for further spread of H. cyanoguttatus is uncertain. My research addressed how extensive the cichlids spread in the GNOMA, how …
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Development of an OpenFOAM Solver for Hydroacoustic Simulations: An Application for Acoustic Fish Deterrence
… an underwater acoustic system designed to deter invasive fish species in the Mississippi River Basin. It leverages an established numerical framework (OpenFOAM) and deals with understanding how to model the system. The study prioritizes enhancing the accuracy of the methods developed and ways to …
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Impacts of the invasive Brook Stickleback (Culaea inconstans) on wandering garter snake (Thamnophis elegans vagrans) fitness, feeding behavior and diet
… not only changing their diet to utilize an invasive fish, but deriving a fitness benefit from the new and often abundant prey item as well. To investigate a potentially similar scenario arising on the Turnbull National Wildlife Refuge (Spokane Co., Wash.), we analyzed the morphometrics, …
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A macroinvertebrate bioassessment of two streams on Turnbull National Wildlife Refuge (TNWR)
… nutrient levels (Davidson and Rule 2006) and invasive fish (Scholz et al. 2003). This project focused on stream sections of the Company Ditch (CD) and Pine Draw (PD) watersheds. Company Ditch historically had very high nutrient levels and low water quality. Water quality may be improving since …
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"The Nonchalant Flick of the Carp's Tail": A Material Ecocritical Analysis of US Literature of Carp Introduction and Invasion
… different historical-cultural moments: as a pond fish, a trash fish, and an invasive species, or invasive alien species (IAS). In addition, each chapter reads these works through a particular facet of material ecocriticism, most notably, that of assemblage formation and distributed agencies. …
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Range expansion in the invasive Round goby (Neogobius melanostomus): behavioural and gene transcriptional components of a successful invader
Range expansion of an invasive species can be influenced by intrinsic mechanisms such as behaviours described as being highly flexible and/or of specific behavioural types that are associated with dispersal ability. In addition, related gene transcription can also be influential in invasion …
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Invasion risk and impacts of a popular aquarium trade fish and the implications for policy and conservation management
Invasive species, a top threat affecting global biodiversity, become invasive through a process including four stages: transport, establishment, spread, impact and integration. Species currently in this process provide opportunities to empirically derive the mechanisms driving each of these stages, …
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Chemically-mediated prey responses: invasive brook stickleback induced changes in behavior and life history of larval long-toed salamanders
… to its natural predators and to an unfamiliar fish. Amphibians express chemically-mediated antipredator defenses in behavior, morphology and life history, and are currently threatened with predation by invasive fish. To investigate this issue, we first initiated a behavioral assay to test the …
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Population crash of an endemic South African cyprinid: the role of non-native fish, drought and other environmental factors
Native freshwater fish are in decline worldwide due to human impacts including impoundment, changes to water quality, over-abstraction, climate change and the introduction of non-native species. South Africa's Cape Fold Ecoregion (CFE) harbours exceptionally high freshwater fish endemism, yet the …
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Invasion Routes and Evolution of Brook Stickleback (Culaea inconstans) in Eastern Washington
<p>Chapter 1. Invasive species pose a serious threat to native ecosystems. In eastern Washington brook stickleback (Culaea inconstans) is an important invasive species, especially at Turnbull National Wildlife Refuge, where they compete with waterfowl for food resources and are associated with …
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Invasive SIlver Carp (Hypophthalmichthys molitrix) Protein Hydrolysates- A Potential Source of Natural Antioxidant
<p>Invasive silver carp (Hypophthalmichthys molitrix), continue to spread over the Mississippi River causing a great concern for the river ecosystem due to their impact on native fish species. To minimize the negative effects of silver carp, many strategies were implemented including using it for …
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Canine scent detection: A new approach to detect invasive freshwater fish
… native species. Methods such as netting, electrofishing, and environmental DNA (eDNA) are used to detect and monitor invasive fish species. However, these methods can be labour intensive, expensive, and can have low sensitivity when fish are rare or elusive. Although scent-detection dogs have …
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Modelling and empirical approaches for predicting the invasiveness of alien species.
… impacts native species then it is considered as invasive. Predicting the outcomes of alien introductions is critical for conservation management, with predictions of dispersal rates a critical component within this. In riverine ecosystems, dispersal can be inhibited by barriers and unidirectional …
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Characterizing the trophic niche of non-native psedorasbora parva and the consequences for native fish communities.
Introductions of non–native fish can be a key driver of environmental change that has major implications for biodiversity and ecosystem functioning, including the adverse consequences of increased inter-specific competition for native fishes. Here, the consequences of an introduction of a model …
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Invasive species: fundamental and applied science
Management of invasive alien species (IAS) is notoriously difficult, with many examples of expensive, failed attempts. While there is growing consensus that prevention is better than cure, successful prevention requires user-friendly, effective methods to quantify the ecological impacts of …
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Invasive non-native species and the management and exploitation of freshwater ecosystems
… are also vulnerable to the establishment of invasive non-native species (INNS), whose prevalence has rapidly accelerated through the expansion of global travel, trade, and transportation. INNS can drive significant changes in habitat suitability and native community composition. I …
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Influence of Resource Pulses Following Stochastic Disturbances on Aquatic Food Webs
… Common carp Cyprinus carpio is a highly abundant invasive fish in shallow eutrophic lakes throughout much of the world and is associated with deleterious effects on aquatic ecosystems due in part to nutrient subsidies provided through bioturbation and excretion. Shallow lakes dominated by common …
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Applied ecology and management of the invasive topmouth gudgeon Pseudorabora parva in England & Wales.
… wider environment. This research used the Asian fish of the Cyprinidae family, topmouth gudgeon Pseudorasbora parva, as the model species, a highly invasive fish in mainland Europe. England and Wales was the model area, where 26 P. parva populations have been recorded but the species is not yet …
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