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Showing 1 to 20 of 94 for “"freshwater fish"”.
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Trajectories of Change in South Africa's Freshwater Fish Fauna
In South Africa, freshwaters are the most threatened ecosystems in the country, facing pressure from water abstraction, land-use change, pollution, invasive species and climate change. These anthropogenic pressures are directly impacting the diversity, abundance, and survival of freshwater fauna …
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The impact of carbon dioxide on freshwater fish behaviors
Freshwater environments have the potential to be impacted by acidification due to increases in dissolved carbon dioxide (CO2). Recent work in the marine environment suggests that increased CO2 levels due to climate change can negatively affect a fish’s ability to detect predators, home to natal …
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Incipient Speciation in Freshwater Fish Species from Two Isolated Watersheds
… is evidence of incipient speciation between freshwater fish populations that reside in two isolated river systems: the Bronx and Saw Mill Rivers that have been separated since the Wisconsin glaciation approximately 17,500 years ago. Both rivers contain many of the same fish species. The …
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Ecological consequences of indigenous and non-indigenous freshwater fish parasites.
… can have considerable consequences for their freshwater fish hosts, irrespective of whether they are intermediate or final hosts. The ecological consequences of infection arise from processes including parasite manipulation, where the parasite manipulates the host to increase their chance of …
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Canine scent detection: A new approach to detect invasive freshwater fish
… have contributed to the decline of New Zealand’s freshwater ecosystems through resuspension of sediment from their feeding behaviour and through competition with native species. Methods such as netting, electrofishing, and environmental DNA (eDNA) are used to detect and monitor invasive fish …
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Barcoding and eDNA metabarcoding of a rapidly changing Neotropical freshwater fish community
… Neotropical region comprises one of the greatest freshwater fish diversities in the world. Conservation and management actions in freshwater realms face great challenges in this region due to an insufficient knowledge base (e.g. shortage of taxonomic expertise, lack of robust, routine, …
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Ecology and conservation of Garra ghorensis, an endangered freshwater fish in Jordan
The focal species of the research was the freshwater cyprinid fish Garra ghorensis. Endemic to the southern Dead Sea basin of the Middle East, it is ‘Red listed’ by the IUCN as ‘endangered’. It inhabits the small rivers of the basin (‘wadis’), existing within fish communities of very low species …
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Tracing the effects of diets in freshwater fish using fatty acid profiles
… fatty acids can be used as diet indicators in freshwater systems. More precisely this work was an effort to explore a tool that can be used to describe what salmonids have consumed during the foraging period of the year and relate that to the materials allocated to embryos. As stomach contents …
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Identifying limitations of monitoring the success of river rehabilitation schemes for freshwater fish
… flood protection, navigation and transportation, fisheries and recreation. Rehabilitation of rivers is a tool that underpins the Water Framework Directive (WFD) by means of addressing river degradation by re-introducing habitat heterogeneity to impacted river systems. Many past and recent papers …
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A study of lethality and toxic mechanisms of intermittent chlorination to freshwater fish
… done on the effects of intermittent exposure on fish, and that temperature has little or no effect on chlorine toxicity. Since many steam-electric generating plants are on streams with predominantly warmwater fish, it was important to determine the effects of the intermittent release of chlorine …
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Decoupling aggression and risk-taking: patterns of variation in two species of freshwater fish
… be uncoupled. The study used two species of freshwater fish that have become something of a model to study behaviour: the three spine stickleback (Gasterosteus aculeatus) and the rainbow trout (Oncorhynchus mykiss). In chapter 1 I give a background on the current research on individual …
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FATSOLUBLE VITAMINS IN BLACK SEA AND FRESHWATER FISH//МАСТНОРАЗТВОРИМИ ВИТАМИНИ В ЧЕРНОМОРСКИ И СЛАДКОВОДНИ РИБИ
… daily intake (RDI) of ten Black Sea (bonito, bluefish, goby, garfish, grey mullet, sprat, horse mackerel, red mullet, shad, and turbot) and five fresh water (common carp, bighead carp, grass carp, catfish and trout) commercially important fish species. Significant seasonal changes of fat soluble …
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Responses of wild freshwater fish to anthropogenic stressors in the Waikato River of New Zealand
… of point-source and diffuse discharges on fish populations of the Waikato River, compare responses to different discharges and identify potential sentinel fish species, we sampled wild populations of brown bullhead catfish (Ameiurus nebulosus, (LeSueur, 1819)), shortfin eel (Anguilla …
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Immune and Endocrine Modulations Associated with Enhanced Plant-Based Protein Diets Within Freshwater Fish Species
… as a protein replacement for marine-derived fish meal (MDFM) has gained momentum with the potential for aquafeed cost reduction, improved growth performance, and reducing exploitation on wild fish stocks. Further, potential health benefits and optimized production performance resulting from …
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Abundance Trends and Drivers of Change in Freshwater Fish Communities of the New River Basin
… two most serious threats to biodiversity within freshwater ecosystems, which are among the most threatened in the world. I examined the effects of these factors, specifically focusing on land use and non-native species as drivers of abundance patterns of native fishes in the highly invaded and …
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Assessing predictive performance and transferability of species distribution models for freshwater fish in the United States
… species distribution models (SDMs) of stream fishes of the United States. I explored the spatial transferability and temporal transferability of stream–fish distribution models in chapter 3 and chapter 4 respectively. Chapter 2 showed that the discrimination power of SDMs for 76 non-game fish …
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FATTY ACID COMPOSITION OF BLACK SEA AND FRESHWATER FISH SPECIES / МАСТНОКИСЕЛИНЕН СЪСТАВ НА ЧЕРНОМОРСКИ И СЛАДКОВОДНИ РИБИ
… shad, horse mackerel, red mullet, turbot, bluefish, anchovy, garfish, grey mullet and bonito) and four freshwater (carp, bighead carp, catfish and trout) commercially important fish species were determined. Seasonal changes of lipid content and fatty acid (FA) composition of six Black Sea fish …
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The Role of Images in Freshwater Conservation in South Africa: An Analysis of Images and Perceptions of Freshwater Fish
Freshwater biodiversity is highly threatened, but under-represented in media, and less well known than marine and terrestrial counterparts. The current lack of public awareness of freshwater species and ecosystems may limit freshwater conservation as a popular cause. The manner in which species are …
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Influence of dispersal, natal environment, and variance in reproductive success on the genetic relationships within a population of freshwater fish
Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2010-07-02T15:01:52Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Barthel_Brandon.doc: 12112384 bytes, checksum: 886e739f241f3bc91cd4029977cd0239 (MD5) Barthel_Brandon.pdf: 2184474 bytes, …
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